As thermal equipment for smelting, roasting, sintering, melting, heating and other processes of materials or workpieces, relatively complete copper smelting furnaces have appeared in China as early as the Shang Dynasty in industrial furnaces, and the furnace temperature can reach 1200 °C. During the Spring and Autumn Period, with the development of technology to increase furnace temperature, cast iron appeared at that time.AUTOMATIC HORIZONTAL ROTARY ANGEL METAL BAND SAW MACHINE CH-300SA In 1794, a straight cupola for melting cast iron appeared in the world. Then, in 1864, on the basis of Siemens (England) regenerative furnace principle, Martin (France) built the first steelmaking open hearth furnace heated by gas fuel. Through the high temperature preheating of air and gas in the regenerator, he made the furnace temperature reach the temperature above 1600 ℃ required for steelmaking.AUTOMATIC HORIZONTAL ROTARY ANGEL METAL BAND SAW MACHINE CH-400SA By the 1920s, the supply of electric energy was gradually sufficient, and various resistance furnaces, electric arc furnaces and cored induction furnaces were used in industry to achieve a wide range of applications. At the same time, the emergence of mechanized and automated furnace types has increased furnace productivity and improved working conditions to a certain extent.Vacuum brazing of surgical forceps - heat treatment process In the 1950s, coreless induction furnaces developed rapidly. Later, electron beam furnaces appeared, which use electron beams to impact solid fuels, which can enhance surface heating and melt materials with high melting points.Research on Vacuum Heat Treatment Technology of Cr12 Steel

The stage from the fuel into the furnace to the ignition temperature is called the preparation stage. In this stage, the evaporation of water should be completed, the volatile matter should be separated out, and the mixture of fuel and air should reach the ignition temperature. Obviously, this stage is the endothermic process, and the source of heat is flame radiation and high-temperature flue gas backflow. In addition to the burner itself, the factors that affect the length of the preparation stage are the strength of the heat provided by the hot flue gas in the furnace for the pulverized coal flow, the amount, temperature, concentration, volatile content and fineness of the pulverized coal flow.HIGH SPEED CIRCULAR SAWING MACHINE HY-85NC When the ignition temperature is reached, the volatile matter is first ignited and burned, releasing heat to increase the temperature, and the coke is heated to a higher temperature and begins to burn. The combustion stage is a strong exothermic process, the temperature rises rapidly, and the chemical reaction is strong. At this time, the surface of the carbon particles often appears in an oxygen-deficient state. The key to the enhanced combustion stage is to strengthen the mixing, so that the air flow is strongly disturbed, so as to provide oxygen to the surface of the carbon particles, and diffuse the carbon dioxide on the surface of the carbon particles.HIGH SPEED CIRCULAR SAWING MACHINE HY-100NC The burnout stage is mainly to burn off the unburned carbon in the combustion stage. Although there is not much carbon left in the burnout stage, it is very difficult to completely burn it out. The main reason is that there are many factors that are not conducive to complete combustion, such as a small amount of carbon. The fixed carbon is surrounded by ash; the oxygen concentration is already low; the disturbance of the air flow is gradually attenuating; the temperature in the furnace is gradually decreasing.Six details of gas carburizing If the fuel has low volatile content, high ash content, coarse pulverized coal, and small furnace volume, it will be more difficult to completely burn out. According to the test, for coal powder with a fineness of R90=5%, 97% of the combustibles can be burned in 25% of the time, while the remaining 3% of the combustibles can be burned in 75% of the time. This is the basic reason why it is impossible to completely burn the combustibles in the actual boiler.Control of retained austenite in tooth angle by vacuum carburizing heat treatment

Tempering equipment description: The glass tempering unit is mainly composed of four parts: the discharge section, the convection heating section, the flat tempering section, and the section extraction section, as well as high-pressure centrifugal fans, air supply pipes, air collection boxes, air circuits, electrical control cabinets, and operating desks. GANTRY COLUMN STRUCTURE HORIZONTAL STRAIGHT CUTTING BANDSAWS CH-1000 The forced convection leveling tempering unit adopts a unique injection flow increasing technology. By sucking hot air in the furnace and mixing it with preheated compressed air in the nozzle, the temperature of the airflow ejected from the nozzle to the glass surface is greatly increased, and the hot air in the furnace is circulated by convection. The forced reinforcement, the uniformity and stability of the furnace temperature are improved, so that the heating effect of the glass in the furnace is better. Compared with general compressed air convection models, the compressed air consumption is reduced by more than half.GANTRY COLUMN STRUCTURE HORIZONTAL STRAIGHT CUTTING BANDSAWS CH-1200 The transmission of each part of the unit adopts AC frequency conversion technology, driven by a motor, and the reciprocating drive speed is adjustable; the operation of each part is automatically completed by the control system composed of industrial computers and PLC; Electric balance, automatic on-off of the main air valve;Control of retained austenite in tooth angle by vacuum carburizing heat treatment The main drive of the furnace body and air grid adopts O-shaped belt drive, and the furnace body adopts triple compound drive synchronization technology, that is, orthogonal circular drive belts plus interconnected circular drive belts; the main drive of the inlet and outlet tables adopts chain drive, with a simple and reliable structure. ;The furnace body and the main drive of the air grid are equipped with a manual emergency film output function when the power is cut off. According to customer needs, an emergency power supply device can also be added to ensure the low-speed operation of the ceramic roller table of the furnace body after a power failure.Vacuum brazing of surgical forceps - heat treatment process

Steel for high-strength bolts The chemical composition requirements of steel for high-strength bolts are as follows: Carbon is the most important element affecting the plastic deformation of steel. The higher the carbon content, the higher the strength of the steel and the lower the plasticity. The higher the carbon content, the lower the quenching heating temperature, the higher the hardenability, and the higher the tendency of cracking and deformation. Manganese can reduce the harmfulness of sulfur to steel.FX27P-60CNC CYLINDRICAL GRINDER (WITH ROBOT UNIT) As a permanent element in steel, the increase of manganese can increase the tensile strength and yield strength of steel, and increase the hardenability. Among the alloy steels, CrMo and CrMoV are more suitable for high-strength fasteners used under complex conditions.FX32A-35CNC HIGH PRECISION OBLIQUE-FEED CNC CYLINDRICAL GRINDER(FULL COVER) In order to control the bolt strength and guaranteed stress within the qualified range, on the basis of increasing the lower limit of hardness, the following five aspects should be paid more attention to during tempering. Differences in materials, furnace types, upsetting (differences between red punching and cold heading), thread differences (difference between full teeth and half teeth, the total effective cross-sectional area of full teeth is small.Vacuum heat treatment of electrical pure iron The bearing tensile strength is low, the tempering temperature deviation is 5-10°C and the difference between the medium (the difference between water quenching and oil quenching). 3. Operation points of mesh belt furnace High-strength fasteners have large production volume and low price, and the threaded part is relatively fine and precise. Therefore, mesh belt furnace is especially suitable for heat treatment of small and medium-sized fasteners, with high degree of automation and good heat treatment quality. .Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics

Gas-fired hot water boiler refers to a boiler that uses flammable gases such as natural gas and liquefied petroleum gas as fuel, and automatically supplies hot water to meet people's daily needs such as heating and bathing. With the awareness of environmental protection and energy saving and emission reduction in the whole society, the energy structure of boilers and heating systems has also shown corresponding changes.ZK5140C/I ZK5150C/I ZK5163C/I CNC VERTICAL DRILLING MACHINE Gas-fired hot water boilers have received widespread attention due to their energy-saving, environmental protection, safety and automatic operation characteristics. At present, they have gradually replaced traditional coal-fired boilers and become the main heating method in cities. How to effectively use energy-saving technology to reduce the operating cost of the boiler, further save limited resources, and prolong its service life as much as possible under the premise of safe operation has become an important issue for the staff.U SERIES UNIVERSAL CUTTER GRINDER Generally speaking, there are many types of gas-fired hot water boilers, such as heating type and bathing type according to usage; normal pressure type and pressure type according to structure; vertical type and horizontal type according to structure, etc. Although various types of gas-fired hot water boilers have certain differences in their structures and shapes, their working principles and operating modes are generally the same, so their energy-saving technologies are relatively universal.Precision carburizing heat treatment of gears Since gas has the characteristic of burning more fully than solid and liquid, gas-fired hot water boilers are more efficient than coal-fired boilers. High combustion thermal efficiency. The survey also shows that, compared with coal-fired boilers, the promotion and use of gas-fired hot water boilers has improved the heating season in various places.High Pressure Gas Quenching Technology For Gears

The reasonable selection of the furnace bottom strength of the regenerative heating furnace is closely related to the furnace length, actual heating capacity, heating quality, and furnace operating conditions (combustion load, furnace pressure, maintenance cycle, furnace body life, etc.). However, there is no detailed information on the calculation of the bottom strength of the regenerative heating furnace. Through the selection and calculation of the furnace bottom strength in the medium-plate regenerative heating furnace project of a steel plant, it is ensured that the use effect is basically consistent with the actual capacity of the furnace.SX2P MINI MILL DRILL (1) The selection of the furnace bottom strength of the regenerative slab continuous heating furnace. When the billet is a room temperature billet and the thickness of the raw material is 150-300mm, it should be based on the heat penetration time of the billet. The furnace bottom strength is generally 600-700kg ( m2.h) is more suitable.SX2LF MINI MILL DRILL (2) When continuous hot charging, the heat storage continuous heating furnace can calculate the heating capacity according to experience. Taking the normal temperature billet as the benchmark, the heating capacity will increase by 11% to 12% for every increase in the billet. Calculating its thermal charging capacity, the furnace bottom strength is more suitable at 1050-1150kg（m2.h）.Precision carburizing heat treatment of gears (3) Because the average radiation temperature and pressure of the regenerative continuous heating furnace is much higher than that of the traditional continuous heating furnace, under the same conditions, the thermal charging heating capacity can be increased by 45% to 55% compared with the traditional furnace.High Pressure Gas Quenching Technology For Gears

There are two types of suspension preheaters: cyclone preheater and vertical cylinder preheater. In the preheater, due to the contact surface between the raw material and the gas.Large volume and good heat exchange, so the thermal efficiency of the system is much higher than other kiln types.LARGE CNC HORIZONTAL LATHE The exhaust gas discharged from the main combustion zone enters the four-stage or five-stage cyclone after complete combustion in the subsequent combustion zone. The preheated raw meal enters the fuel decomposition and combustion zone of the D-D furnace from the three-stage or four-stage cyclone, and enters the kiln through the five-stage cyclone after preheating and decomposition.HIGH PRECISION CNC LATHE The D-D furnace throat directly connected to the kiln tail is a device for adjusting balance, which can balance the combustion gas volume of the rotary kiln and the high-temperature air passing through the tertiary air duct. At the same time, since the raw meal fed to the D-D furnace forms a eruption layer in the reduction zone, the concentration of the raw meal in the lower part of the D-D furnace increases, so that the temperature of the exhaust gas entering the furnace drops sharply, preventing the bottom of the furnace from forming a crust .Vacuum heat treatment of electrical pure iron The technological process in charge of the calciner is mainly the decomposition process of carbonate. In the actual production process, there are many factors affecting the decomposition of raw meal carbonate, and the situation is also very complicated. But the main factors are the decomposition temperature in the furnace, the degree of uniform distribution and residence time of materials in the furnace, and the physical properties of raw materials.Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics

Heat treatment mesh belt furnace has been widely used in fasteners, bearings, transmission parts and other mechanical parts. With the improvement of the manufacturing technology level of mesh belt furnaces and the requirements of energy saving, the heating method of the third generation product of mesh belt furnaces - stick-type mesh belt furnaces has developed from heating by metal electric heating elements to heating by gas. The heat generation device of the electric heating mesh belt furnace usually adopts a radiant tube, which is composed of a metal outer tube and a built-in squirrel-cage heating element. Depending on the operating temperature, the material used in the radiant tube is also different.XK7132A XH7132A CNC MILLING MACHINE CENTER The heating element with built-in squirrel-cage structure is composed of metal electric heating elements and corundum insulating ceramic sheets. The metal heating element is a resistance wire, and its commonly used materials are nickel-chromium alloy wire and iron-chromium-aluminum alloy wire. After the nickel-chromium alloy wire is heated in the air, a layer of hard Crz03 protective film is formed on the surface and adheres to the alloy substrate. The melting point is higher than that of the alloy substrate. It can withstand alternating heating and cooling and has strong corrosion resistance.XK7136 XH7136 CNC MILLING MACHINE The heat generation device of the gas heating mesh belt furnace is commonly known as the gas burner. For the convenience of use, maintenance and energy saving, the high-speed burner enables the fuel and the combustion-supporting air to be completely burned in the combustion chamber. Spray into the furnace at a high speed, strengthen the convective heat transfer to the workpiece, promote the circulation of the air flow in the furnace, and achieve the purpose of uniform furnace temperature and improved heating effect.Vacuum heat treatment of electrical pure iron The control of the gas burner is more complicated than that of the electric heating radiant tube. It needs to complete the flame detection in the furnace, automatic ignition control, gas supply control, combustion air control, etc. The combustion system adopts a ratio valve control method to make the gas/air ratio the best and reduce excess air.Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics

1. When the electric furnace is used for the first time or is used again after long-term inactivity, it must be dried in an oven. Oven temperature and time: Room temperature - 300°C for 4 hours Open the furnace door to evaporate most of the moisture in the furnace.HORIZONTAL MITRE BAND SAW MACHINE BS-1018R 300°C--800°C rapid temperature rise, close the furnace door. 800℃--1000℃ for 3 hours Open the furnace door regularly until there is no moisture in the furnace door.HORIZONTAL SCISSOR STRUCTURE MITER METAL BAND SAW MACHINE CS-280S 2. When the electric furnace is used, the input power must not exceed the rated power, and the furnace temperature must not exceed the rated temperature, so as not to damage the heating element and inner furnace lining. It is also forbidden to directly pour liquid and molten metal into the furnace. Regularly clean the iron filings and oxides in the furnace to keep the furnace clean. 3. Silicon-molybdenum rods are suitable for use in air and neutral atmospheres (such as inert gases). Reducing atmospheres such as hydrogen will destroy the protective layer, and chlorine and sulfur vapors will severely corrode silicon-molybdenum rod components.Control of retained austenite in tooth angle by vacuum carburizing heat treatment 4. Silicon-molybdenum rods should not be used for a long time in the temperature range of 400°C to 700°C, because the silicon-molybdenum rods will be oxidized and destroyed in this temperature range.Vacuum brazing of surgical forceps - heat treatment process 5. Regularly check whether the electric furnace and the connection parts of the conductive system of the temperature controller are in good contact. (Special attention should be paid to the connection point of silicon molybdenum rod heating element.)

The focus pusher is made of Q345-B material, with water cooling wall; it is made of 16Mo3 material, without water cooling wall. Since the coke pusher is the core component of the coke pusher equipment and even the entire coke oven machinery, if the design structure of the coke pusher is unreasonable or the material is improperly selected, the entire coke discharge process will be affected. Therefore, it is very important to choose the structure and material of the focus pusher reasonably. The design structure, material and advantages and disadvantages of the two focus pusher rods are introduced below.FULLY AUTOMATIC HIGH SPEED METAL CIRCULAR SAW MACHINE The design concept of Yankuang 7.63m coke oven machinery is environmental protection, structural optimization and energy saving. Therefore, the coke pusher they designed is a cooling wall structure, that is, the coke pusher is cooled by circulating water, so that the coke pusher will not be thermally deformed and cracked due to excessive temperature in the carbonization chamber. The body material of the focus pusher is Q345-B, and the structure is a box beam type with water cooling walls on both sides.HIGH SPEED CIRCULAR SAWING MACHINE HY-75NC Because there is a cooling water system in the coke pushing system to meet the supply of circulating water in the cooling wall of the coke pushing rod, 2 sets of water pumps are needed to provide power, and cooling water heat exchangers, support chains, special heat-resistant rubber hoses, and control valve groups are also required Wait. Due to the extremely complex external structure of the water system and the high performance requirements of each part, the cost of the entire equipment is greatly increased, and it brings a lot of inconvenience to daily maintenance.Tips for vacuum brazing problem The main advantage of this structure is that the material of the main body can be ordinary carbon steel Q345-B, which is easy to purchase and low in cost; in addition, the structure of the water-cooled wall can relieve the pressure of the coke pusher due to sudden cooling under different external temperatures. Thermal deformation and cracks due to sudden heating.Research on Vacuum Heat Treatment Technology of Cr12 Steel

MBZ direct-type coal-fired hot air stove is composed of MBL coal-burning machine, high-temperature gas purification room and air mixing room. This device uses a coal-fired machine as the first-level heat supply. The raw (bituminous) coal is added to the coal hopper at one end of the coal-fired machine through the coal feeder, and the coal seam of a certain height is fed into the coal-fired machine at a uniform speed by the chain grate. In the combustion chamber, under the action of the combustion-supporting fan, the high-temperature flue gas generated by coal combustion is ejected from the side fire outlet of the coal-fired machine into the high-temperature gas purification chamber. GANTRY COLUMN STRUCTURE HORIZONTAL STRAIGHT CUTTING BANDSAWS CH-1000 The high-temperature gas purification chamber is made of refractory materials, and the high-temperature flue gas undergoes secondary combustion in the purification chamber, and a small amount of dust entrained during the coal combustion process is polymerized and settled in the purification chamber by high temperature. The clean hot air (~1000°C) coming out of the purification room is mixed with a certain amount of cold air, and mixed to form hot air at the temperature (200-300°C) required for material drying, which enters the spray tower to dry the material (papermaking black liquor). GANTRY COLUMN STRUCTURE HORIZONTAL STRAIGHT CUTTING BANDSAWS CH-1200 The temperature of the hot air can be adjusted according to the needs of the process, and the temperature stability of the continuous hot air is ±5°C. The burnt coal slag is discharged from the other end of the coal burner to the slag discharger, and sent out through the automatic scraper slag discharger.Research on Vacuum Heat Treatment Technology of Cr12 Steel Environmental protection up to standard, no secondary pollution, clean operating environment; high cleanliness of hot air, dust content <120mg/Nm3, no open flame in hot air; high thermal efficiency >95%;Vacuum heat treatment of 3Cr2W8V steel-aluminum die-casting mold

Tube furnaces are mainly used in metallurgy, glass, heat treatment, lithium battery positive and negative materials, new energy, LED luminescent materials, abrasive tools and other industries to measure materials under certain atmosphere conditions.X1 MICRO MILL DRILL The tube furnace is protected by hydrogen filling after vacuuming, and uses the principle of medium frequency induction heating to generate high temperature in the tungsten crucible in the coil tube, and conducts it through thermal radiation. Powder forming and sintering of tungsten, molybdenum and their alloys.SX1 MOCRO MILL DRILL 1. After the tube furnace is used for the first time or not used for a long time, it should be baked at a temperature of about 120°C for 1 hour, and then used at a temperature of about 300°C for 2 hours to avoid cracking. The furnace temperature should not exceed the rated temperature as far as possible, so as not to damage the heating element and furnace lining.Vacuum brazing of surgical forceps - heat treatment process It is forbidden to directly inject various liquids and dissolved metals into the furnace, and keep the furnace clean. 2. If a quartz tube is used in a tube furnace, when the temperature is higher than 1000°C, the high temperature part of the quartz tube will become opaque. This is called devitrification, which is an inherent defect of quartz glass tubes and is normal.Tips for vacuum brazing problem

The heat pump dryer uses the reverse Carnot principle to absorb the heat of the air and transfer it to the warehouse to increase the temperature of the drying room, and cooperate with the corresponding equipment to realize the drying of the material. The heat pump dryer consists of a compressor-heat exchanger (inner unit)-throttler-heat absorber (outer unit)-compressor and other devices to form a cycle system. The refrigerant circulates in the system under the action of the compressor.X1 MICRO MILL DRILL It completes the gaseous boosting and heating process in the compressor (temperature up to 100°C), it enters the internal machine and releases high-temperature heat to heat and dry the air in the room, and at the same time it is cooled and transformed into a liquid state, when it runs outside After cooling down,SX1 MOCRO MILL DRILL the liquid state quickly absorbs heat and evaporates and turns into a gaseous state again, and at the same time the temperature drops to minus 20°C - 30°C. At this time, the air around the heat absorber will continuously transfer heat to the refrigerant. The continuous circulation of the refrigerant can transfer the heat in the air to the drying room to heat the air temperature in the room.Vacuum brazing of surgical forceps - heat treatment process It adopts embedded installation and is integrated with the warehouse, which is easy to install and easy to maintain. It adopts the design of multi-fan and large air volume, which can provide even air supply and better drying effect.Tips for vacuum brazing problem

Basic inspection: Firstly, the sundries on the foundation should be removed, and a temporary and reliable fence should be erected on the edge; level gauges for measuring elevation, Ф0.5mm steel wire, wire hammer, CK6136Q CK6140Q CK6150Q HIGH PRECISION EFFICIENT METAL FLAT BED CNC LATHEink fountain and adjustable brackets for pulling steel wire ropes should be prepared; foundation center given by civil engineering line position, check whether the vertical and horizontal centerlines are vertical.CQ6280C SERIES UNIVERSAL LATHE After the center line meets the requirements, use a hammer to cast the center position on the foundation embedded part or the foundation edge angle iron frame, and mark it; Vacuum brazing of surgical forceps - heat treatment process according to the foundation center line, check the actual position and center deviation of the anchor bolts and each positioning embedded part No more than 2mm, record the inspection results in the installation record; Tips for vacuum brazing problem clean the anchor bolts, measure the verticality deviation of the bolt holes should be <L/450; and the elevation of the settlement observation point, and make a record; check the shape and size of the foundation and the shape and size of the hole, which should meet the design requirements; check that the surface of the foundation should be free of defects such as pockmarks, honeycombs, cracks, holes, and exposed ribs.

The main task of the aluminum alloy smelting furnace is to efficiently melt aluminum ingots, scrap and other furnace materials to prepare aluminum alloys. The development history of aluminum alloy smelting furnace is actually the history of continuous improvement and improvement of furnace efficiency in view of existing problems. The basic requirements for modern aluminum alloy melting furnaces are: 1) Good thermal performance. That is, the melting speed is fast, the thermal efficiency is high, and the fuel consumption per unit output is small.X6230 SERIES UNIVERSAL SWIVEL HEAD MILLING MACHINE 2) Good operability. That is, the furnace temperature is uniform, the furnace temperature, furnace pressure, and furnace atmosphere can be easily adjusted and controlled, and the charging and stirring are easy to realize mechanized operations, and the adaptability to fuel changes is strong.X5746 X5750 X5750A UNIVERSAL RAM MILLING MACHINE 3) High cost performance. That is to say, the equipment occupies a small area, the equipment investment per unit output is low, the service life is long, the maintenance cost is low, the metal loss is small, and the fuel used is cheap and easy to obtain.Six details of gas carburizing 4) Environmental protection and safety. That is, the equipment has low noise, good furnace sealing, good smoke exhaust, and good operating environment; the equipment must have reliable safety guarantees in the process of ignition, combustion, and flameout.Control of retained austenite in tooth angle by vacuum carburizing heat treatment

Gas industrial furnace is a complex thermal equipment. It generally consists of the following parts: furnace, gas combustion device, flue gas exhaust device, furnace door and lifting device, metal frame, various auxiliary equipment (such as waste heat utilization device, various measurement control and adjustment devices, etc.).FULLY AUTOMATIC HIGH SPEED METAL CIRCULAR SAW MACHINE The furnace is the core area of the gas industrial furnace. It is a place where the gas can be stably burned, and the heated workpiece can directly or indirectly exchange heat with the high-temperature flame and flue gas.HIGH SPEED CIRCULAR SAWING MACHINE HY-75NC The hearth is made of refractory materials and is a closed space surrounded by furnace walls, furnace roof and furnace bottom (including foundation).The side brickwork of the furnace is called the furnace wall. Cemented carbide vacuum dewaxing and sintering process It is required to have sufficiently high refractoriness and qualified heat insulation performance. The interior of the furnace wall is built with refractory clay bricks, plus a heat insulating layer, and the outer surface is covered with a steel plate shell with a thickness of 4 to 10 mm.High Pressure Gas Quenching Technology For Gears

At present, aluminum alloy has the largest number of die castings. It has light weight, high specific strength, high mechanical properties and corrosion resistance, etc. However, compared with zinc alloy, its casting performance is relatively poor, and it has a tendency to stick to the mold. , it is more likely to produce defects such as oxidation, gas absorption, segregation, slag inclusions, and large crystal grains during smelting. Iron is a harmful element in aluminum alloys, but when the iron content in aluminum alloys is lower than 0.6%, it will be damaged during the production process. Die sticking is easy to occur in the medium, and when it is higher than 1%, the mechanical properties of the alloy will be reduced. The reasons for the "iron increase" of aluminum alloys mainly come from three aspects:FULLY AUTOMATIC PLC CONTROL HORIZONTAL STRAIGHT CUTTING BANDSAWS GZ4250 1) During the smelting process, there are many opportunities for contact between iron and alloys, such as crucibles, iron spoons, ladles, smelting tools, etc., and their surfaces should be coated with paint.Cemented carbide vacuum dewaxing and sintering process 2) The dissolution rate of iron in molten aluminum alloy increases with the increase of temperature. When the melting temperature of aluminum alloy is higher than 750°C, it is called "overburning of aluminum alloy". At this time, the dissolution rate of iron increases rapidly.High Pressure Gas Quenching Technology For Gears 3) In addition to the temperature factor, the iron increase in aluminum alloy is also related to time, that is, the longer the holding time, the more iron is added, and the air intake is also increased. All are beneficial.Six details of gas carburizing

According to the furnace temperature system, it can be divided into a heating period and a preheating period. The furnace is also divided into a heating section and a preheating section accordingly. The small furnace for heating thin materials is also heated on one side. Z3040X13 RADIAL DRILLING MACHINE Generally, it is heated on both sides. When burning coal, there is a combustion chamber at the end, which is called the head furnace, and the combustion chamber for lower heating is located on both sides, which is called the waist furnace. For heavy oil or gas stoves, burners are installed on the upper and lower end walls, and sometimes burners are also installed on the side walls.Z3050X16 RADIAL DRILLING MACHINE When the thickness of the billet is not large, a two-stage furnace can be used, but when the end face of the billet is thick, the temperature difference between the inside and outside is relatively large after heating.High Pressure Gas Quenching Technology For Gears In order to eliminate the temperature difference, the heating time must be extended, but it is limited by the surface temperature of the material. If the surface temperature is too high, heating defects will occur. At this time, the two-stage continuous heating furnace cannot meet the requirements.Six details of gas carburizing

The utility model provides an automatic loading and unloading layered curing furnace, which comprises a layered curing furnace, an automatic feeding module located at the front end of the layered curing furnace and an automatic unloading module located at the rear end of the layered curing furnace; HD2525-1 CNC SINGLE- SPINDLE GANTRY MOVABLE HIGH-SPEED the layered curing furnace includes The frame body is equipped with multi-layer parallel baking chambers, and the heating device and temperature control device are arranged in the baking chamber, and the front end of each layer of baking chamber is provided with an independently controlled feeding furnace door ,HD2020-1 CNC SINGLE- SPINDLE GANTRY MOVABLE HIGH-SPEED DRILLING MACHINE the rear end of each layer of baking cavity is provided with an independently controlled discharge furnace door; when feeding, the feeding furnace door is opened, and the automatic feeding module places the material in the baking cavity, and the feeding furnace door Close; when the material is baked in the baking cavity, Precision carburizing heat treatment of gears open the discharge furnace door, and the automatic unloading module will take the material out of the baking cavity; each layer is fed and discharged according to this action. Adopting the technical scheme of the utility model, the multi-layers are loaded and discharged in turn for baking, which greatly improves the efficiency and reduces the cost; the structure is simple and convenient for implementation.Cemented carbide vacuum dewaxing and sintering process

This calciner is developed on the basis of summarizing the rich experience of many out-of-kiln decomposition methods. It is formed by adding a TSD calciner between the kiln and the C5 cyclone. It mainly consists of the swirl pre-combustion chamber, the main furnace and the ascending pipe to form the calciner area.CK6163 CK6180 CK6185 HEAVY DUTY HORIZONTAL FLAT BED CNC LATHE MACHINE There is a shrinkage between the kiln tail smoke chamber and the main furnace to balance the pressure between the kiln and the calciner. The wind speed at the constriction can generally reach 30-50 m/s, and the negative pressure is 0.8-1.0 kPa. CK61100 CK61125 MULTI-FUNCTIONAL AND PRECISION METAL CNC FLAT-BED LATHE The tertiary air drawn from the cooler enters the furnace at a certain speed from the upper part of the pre-combustion chamber in a tangential direction. The raw material coming down from the C4 cyclone is fed into the airflow before the tertiary air enters the furnace, and a spreader is installed there to make the air and material mix into the furnace.High Pressure Gas Quenching Technology For Gears Intense vortex motion is generated inside it, and due to the centrifugal force, the central part of the pre-combustion chamber becomes the equilibrium phase area of the material concentration, and the peripheral part becomes the dense phase area of the material.Six details of gas carburizing