Box-type muffle furnace is a commonly used high-temperature furnace, which is widely used in metal heating, sintering, annealing and other processes. cnc-horizontal-metal-band-sawing-machine-gz4265In order to ensure the accuracy and stability of the temperature in the furnace, it is very important to verify the box-type muffle furnace. This article will give a detailed introduction to the inspection records of box-type muffle furnaces.automatic-type-double-column-horizontal-metal-band-sawing-machine-gz4240  Furnace door sealing performance verification The sealing performance of the furnace door is one of the important factors for the box-type muffle furnace to maintain temperature stability. The verification record should include the following: 1. Check whether the furnace door seal is intact and whether there are problems such as aging and cracking;automatic-type-double-column-horizontal-metal-band-sawing-machine-gz4240-1-5-meters-servo  ⒉. Make sure there is no obvious air leakage after the furnace door is closed; 3. Evaluate whether the sealing performance meets the requirements by observing whether there is obvious heat leakage around the furnace door.Alumina ceramic densely sintered

The heat generating device of the heating mesh belt furnace usually adopts a radiant tube, which consists of a metal outer tube and a built-in squirrel cage structure.Analysis of vacuum heat treatment process for wind power products The composition of the heating element is shown in Figure 1. Depending on the operating temperature, the material used in the radiant tube is also different.Vacuum Hardening Stainless Steel The metal outer tube of the radiant tube of the quenching furnace is made of SUS310S, and the maximum operating temperature can reach 1200°C. Tempering furnace The metal outer tube of the radiant tube is made of SUS304, and the maximum operating temperature can reach 800°C.Sintering of B4C by Pressureless Liquid Phase Sintering The heating element with built-in squirrel-cage structure is composed of metal electric heating elements and corundum insulating ceramic sheets. Metal heating elements are also It is called resistance wire, and its commonly used materials are nickel-chromium alloy wire and iron-chromium-aluminum alloy wire.Vacuum Heat Treatment of Fasteners

In industrial production, use the heat generated by fuel combustion, or convert electrical energy into heat energy, so as to purchase thermal equipment for various processing techniques such as smelting, heating, drying, sintering, cracking and distillation of workpieces or materials, Known as industrial furnaces.Vacuum Heat Treatment Applications for Metal Machine Tools and Gear Parts  Industrial kiln is mainly composed of furnace lining, furnace frame, heating device (such as combustion device, electric heating element), preheater, furnace front pipeline, smoke exhaust system, furnace machinery and other parts.Pay Attention to Vacuum Tempering to Improve the Quality of Quenched Parts At present, industrial furnaces are widely used in all walks of life in the national economy, such as metallurgy, building materials, chemical industry, light industry, food and ceramics and other industries. It has many varieties, high energy consumption and great influence, and is the key equipment for industrial heating. The development of its heating technology and the adoption of high-efficiency energy-saving technology have a great impact on improving product quality, reducing production costs, rationally utilizing energy, improving working conditions, and realizing civilized production.Analysis of vacuum heat treatment process for wind power products In practical application, according to different industrial furnaces and specific production process requirements, comprehensive consideration should be given to design, construction, operation, maintenance and management, and strive to meet the above basic requirements as much as possible.Vacuum Hardening Stainless Steel

The tube furnace air firing method means that before the material is baked in the tube furnace, an empty firing operation is required to remove the moisture and other impurities in the tube. The specific steps of empty burning operation are as follows:Vacuum sintered powder metallurgy parts Open the intake and exhaust valves of the tube furnace to allow the air in the furnace to circulate. Turn on the power and adjust the temperature in the furnace to the set temperature. After the temperature in the furnace reaches the requirement, clean up the materials in the furnace.316L stainless steel vacuum brazing process Close the intake valve and let the gas in the furnace circulate so that the oxygen and other impurities in the air in the tube can be fully burned. Maintain the temperature and time in the tube until the combustion in the tube is completely over.Close the exhaust valve and lower the temperature in the furnace to room temperature. Check whether there are residual ash and other sundries in the tube furnace, and clean them up in time.Vacuum heat treatment of aluminum alloy die castings The above are the specific steps of the tube furnace empty firing method. During air firing, the temperature and time must be strictly controlled to ensure the quality of the material in the tube and the safety of the equipment in the furnace.Vacuum Oil Quenching for steel hardening heat treatment

The surface of silicon is always covered with a layer of silicon dioxide, even if it is just cleaved silicon, at room temperature, as long as it is exposed to air, an oxide film of several atomic layers will be formed on the surface. Sintering of B4C by Pressureless Liquid Phase Sintering When we expose the silicon wafer to a high temperature and oxygen-containing environment for a period of time, the surface of the silicon wafer will grow a layer of silicon dioxide, SiO2, which has good adhesion to silicon and is highly stable chemically and electrically insulating. Vacuum Heat Treatment of Fasteners  Because silicon dioxide has such good properties, it is widely used in silicon semiconductor devices. According to different needs, silicon dioxide is used for the protective layer and passivation layer of devices, as well as the isolation of electrical properties, insulating materials and dielectric films of capacitors, etc. Vacuum sintering of transparent ceramics In addition to being prepared by heating silicon wafers, silicon dioxide can also be obtained by various chemical vapor deposition, such as LPCVD and PECVD. The choice of which method to prepare the silicon dioxide layer has a considerable relationship with the manufacturing process of the device.Vacuum sintered powder metallurgy parts

1. Ammonia is a poisonous gas with a stimulating odor, which is harmful to human eyes and respiratory organs. Leakage should be prevented, especiallyVacuum Heat Treatment of Fasteners  Prevent the human body from contacting with liquid ammonia, otherwise it will cause skin burns. 2. Frequently check and maintain the airtightness of the gas system of the device. The leakage of ammonia gas has an irritating odor, while the decomposition gas is colorless and odorless, but it is flammable and explosive gas. Therefore, in order to prevent leakage and avoid accidents, unqualified gas and waste gas must be vented to the outside.Vacuum sintering of transparent ceramics 3. Strict control of temperature is an essential condition for the full decomposition of ammonia, so it is necessary to pay attention to whether the temperature controller is working normally. If the temperature controller fails or the thermocouple is not in good contact, it will easily cause the inconsistency between the indicated temperature and the actual temperature, and even burn out if the temperature is too highVacuum sintered powder metallurgy parts Once the decomposition furnace and catalyst are found, the power supply should be cut off immediately for maintenance. The calciner must not exceed 850°C during the heating process. 4. Do not touch parts such as high-temperature surfaces with hands, arms and body.316L stainless steel vacuum brazing process

High-temperature furnace box furnace is a common high-temperature heating equipment. Its structural features mainly include furnace body, heating element, temperature control system and furnace door. The following will explain these aspects in detail, and expand the description in conjunction with the title center.Vacuum Heat Treatment of Fasteners  The furnace body is the main part of the high-temperature box-type furnace, which is usually welded by steel plates and has high strength and stability. The interior of the furnace body is usually lined with high temperature resistant materials to ensure the high temperature resistance of the furnace body. In addition, the furnace body is also equipped with vents and exhaust ports to facilitate the circulation and discharge of gas in the furnace.Vacuum sintering of transparent ceramics The heating element is the core part of the high temperature box furnace, usually made of materials such as resistance wire or electric heating rod. The number and layout of heating elements are determined according to the size of the furnace body and heating requirements. Usually, multi-point heating is used to ensure the uniformity and stability of the temperature in the furnace.Vacuum sintered powder metallurgy parts Third, the temperature control system is an important part of the high-temperature box-type furnace, and its main function is to monitor and control the temperature in the furnace in real time. The temperature control system is usually composed of temperature sensors, controllers and actuators, which can realize functions such as automatic temperature control and timing temperature control to meet different heating requirements.316L stainless steel vacuum brazing process

Resistance furnaces are widely used in the national economy, and high-power resistance furnaces are used in various industrial production processes. However, there are various interference factors in most resistance furnaces, Vacuum Heat Treatment of Fasteners  which will bring great changes to industrial production. Therefore, in the design of the resistance furnace temperature control system, it is necessary to consider how to effectively avoid various interference factors and adopt a better control scheme.Vacuum sintering of transparent ceramics It is very necessary to choose a suitable chip and control algorithm. This design requires the design of a hardware part of a resistance furnace temperature control system that can be widely used in various fields with a single-chip microcomputer. Vacuum sintered powder metallurgy parts The hardware circuit design takes the single-chip microcomputer as the control core and configures the clock circuit, temperature detection circuit, temperature control circuit and alarm circuit outside. Realized processing, storage, alarm and other functions.316L stainless steel vacuum brazing process

Regenerative combustion technology has been used in large-scale and high-temperature furnaces such as blast furnace hot blast stoves, open hearth furnaces, coke ovens, and glass melting furnaces since the mid-19th century. Optimal Vacuum Heat Treatment For Bevel Gears The principle is to use the waste heat recovery device in the regenerator to alternately switch the flue gas and air to make it flow through the regenerator, so as to recover the sensible heat of the high-temperature flue gas to the greatest extent and increase the temperature of the combustion-supporting air. However, the traditional regenerator uses checker bricks as the regenerator, which has low heat transfer efficiency, large regenerator volume, and long reversing cycle, which limits its application in other industrial furnaces.Vacuum Hardening Stainless Steel The new type of regenerator adopts ceramic balls or honeycomb as the regenerator, and its specific surface area is as high as 200-1000m2/m3, which is dozens to hundreds of times larger than the old checker bricks, thus greatly improving the heat transfer coefficient. The volume of the regenerator can be greatly reduced. In addition, due to the improvement of the reversing device and control technology, the reversing time is greatly shortened. The reversing time of the traditional regenerator is generally 20-30 minutes, while the reversing time of the new regenerator is only 0.5-3 minutes.Sintering of B4C by Pressureless Liquid Phase Sintering The new regenerator has high heat transfer efficiency and short reversing time, resulting in low exhaust gas temperature (below 200°C), and high preheating temperature of the preheated medium (only 100-150°C lower than the furnace temperature). Therefore, the waste heat of the exhaust gas is recovered close to the limit, the temperature efficiency of the regenerator can reach more than 85%, and the heat recovery rate can reach more than 80%.Vacuum Heat Treatment of Fasteners

The feeding gate is a proportional valve, that is, a valve that can control the switching speed of the valve. The proportional valve has a pilot valve, and the pilot valve must be energized whether the valve is opened or closed. The proportional valve is a valve controlled by 4~20mA signal, 4~12mA controls the valve to close, and 12~20mA controls the valve to open.Vacuum Hardening Stainless Steel The absolute value of the difference between the current and 12mA determines the speed of the valve action. The larger the absolute value of the difference, the faster the valve action; the smaller the absolute value of the difference, the slower the valve action.Sintering of B4C by Pressureless Liquid Phase Sintering Unloading gate operation screen: The computer controls the power on and off of the pilot valve and the input current of the proportional valve by comparing the set value of the blanking gate with the actual value of the blanking gate, so as to realize the precise positioning of the blanking gate. That is to say, when the deviation between the set value and the actual value is less than 100 degrees, there is no need to adjust the opening degree, and the unloading gate will not act. When the deviation between the set value and the actual value is greater than degrees, and the set value is greater than the actual value, the valve is opened; when the deviation between the set value and the actual value is greater than degrees, and the set value is less than the actual value, the valve is closed. Vacuum Heat Treatment of Fasteners  There are 3 speed gears for forward and reverse valve action, which are high speed, medium speed and low speed respectively. The larger the deviation value is, the faster the valve action speed will be. When the difference between the actual angle and the set angle is greater than 8 degrees, use high speed, when it is 4~8 degrees, use medium speed, and when it is less than 4 degrees, use low speed.Vacuum sintering of transparent ceramics

The main components of diesel engine fuel system include fuel injection pump, fuel injector assembly, fuel injector, plunger assembly, fuel delivery valve assembly and other precision components.Application of Vacuum Heat Treatment in Fastener Manufacturing Its manufacturing process includes casting, forging, stamping, cold extrusion and metal cutting and other soft processing forming technologies before heat treatment. After heat treatment, it needs to be finished by grinding, honing, grinding, EDM, Optimal Vacuum Heat Treatment For Bevel Gears electrolysis and other processing methods. After the processing of parts is completed, assembly and performance testing should be carried out according to the prescribed procedures. Only after passing the test can it leave the factory as a finished product.Vacuum Hardening Stainless Steel In addition to requiring high hardness and wear resistance after heat treatment, the material of precision coupling parts should have high tempering resistance and dimensional stability, good corrosion resistance and contact fatigue strength, and small linear expansion In addition to the coefficient, it should also have good machinability.Sintering of B4C by Pressureless Liquid Phase Sintering

This furnace is mainly used for artificial aging treatment of standard profiles produced in the extrusion workshop, so as to eliminate the internal stress of the profiles and improve their mechanical strength.Vacuum sintering of transparent ceramics Put the billet on the material frame, push the material frame into the furnace, and close the furnace door.Turn on the heater and fan, observe the temperature rise in the furnace, the general temperature rise rate is 135°C/h, and make a record.Aluminum alloy and stainless steel vacuum brazing When the temperature in the furnace rises to 200°C, hold the temperature for 2.5 hours.Downtime baked.Strictly implement the shift system. Vacuum sintered powder metallurgy parts The shifter should clearly explain the use of the aging furnace and the problems found to the successor, and fill in the shift record. The successor should inquire in detail and check the acceptance.316L stainless steel vacuum brazing process

The rolled steel plate of a cold-rolled sheet project is annealed, and the annealing method is an all-hydrogen bell annealing furnace. The unit is located on the AB span of the third area of the main workshop, between lines 310 and 324 (see the floor plan). Application of Vacuum Heat Treatment in Fastener Manufacturing The whole set of units has imported technology from the German LOI company and has 17 furnaces in total. Each annealing furnace is composed of hearth, inner cover, outer cover, cooling cover, quick cooling system, medium pipeline, hydraulic control system, etc. (see Figure 1). Optimal Vacuum Heat Treatment For Bevel Gears The installation elevation is on the steel structure of -40mm (outside: -30mm), and the diameter of the hearth is 2.81 meters. The inner cover, heating cover, cooling cover, quick cooling system and combustion support system of the bell furnace are all provided by the manufacturer Tianjin LOI. Vacuum Hardening Stainless Steel The company assembles the whole and only needs to be hoisted as a whole, so the installation focuses on the installation of the furnace platform, surrounding equipment and the installation of the furnace bottom medium pipeline. This plan is specially compiled for the better construction of the whole unit.Sintering of B4C by Pressureless Liquid Phase Sintering

In industrial production, use the heat generated by fuel combustion, or convert electrical energy into heat energy, so as to purchase thermal equipment for various processing techniques such as smelting, heating, drying, sintering, cracking and distillation of workpieces or materials, Vacuum Heat Treatment of FastenersKnown as industrial furnaces. Industrial kiln is mainly composed of furnace lining, furnace frame, heating device (such as combustion device, electric heating element), preheater, furnace front pipeline, smoke exhaust system, furnace machinery and other parts.Optimal Vacuum Heat Treatment For Bevel Gears At present, industrial furnaces are widely used in all walks of life in the national economy, such as metallurgy, building materials, chemical industry, light industry, food and ceramics and other industries. It has many varieties, high energy consumption and great influence, and is the key equipment for industrial heating. Sintering of B4C by Pressureless Liquid Phase Sintering The development of its heating technology and the adoption of high-efficiency energy-saving technology have a great impact on improving product quality, reducing production costs, rationally utilizing energy, improving working conditions, and realizing civilized production.Vacuum Hardening Stainless Steel

The performance of metal materials is generally divided into two categories: process performance and service performance. The so-called process performance refers to the performance of metal materials under the specified cold and hot processing conditions during the processing and manufacturing process of mechanical parts. Vacuum Oil Quenching for steel hardening heat treatmentThe quality of the metal material process performance determines its adaptability to processing and forming in the manufacturing process. Due to different processing conditions, Vacuum sintered powder metallurgy partsthe required process performance is also different, such as casting performance, weldability, forgeability, heat treatment performance, machinability, etc. The so-called service performance refers to the performance of metal materials under the conditions of use of mechanical parts, including mechanical properties, physical properties, chemical properties, etc. The performance of metal materials determines its scope of use and service life.Vacuum heat treatment of aluminum alloy die castings In the machinery manufacturing industry, general mechanical parts are used in normal temperature, normal pressure and non-strongly corrosive media, and each mechanical part will bear different loads during use. The ability of metal materials to resist damage under load is called mechanical properties (or called mechanical properties).316L stainless steel vacuum brazing process

First open the adjustment mode: (1) From the front room to the back room, press the forward button F3 of the pushing device until the signal light 1 of the material hook hooked to the material tray lights up, Vacuum Hardening Stainless Steeland then press the backward button F4 of the push-pull device to pull the tray out , until the material tray reaches the pulling position, the material hook is unhooked [unhook light 2 lights up] press F5 to open the middle door, press F3 to push the material tray into the back room, Metallographic Inspection Knowledge of Bolt Quenching And Temperingpush it to the position and 4 lights up, the material hook returns to 5, and the middle door Closed, the material hook returns to the original position, and the action stops. (2) The material tray goes from the back room to the front room, firstly raise the lifting platform, press the F3 material hook to 11, open the middle door, Ion Nitriding vs Gas Nitridingstop the material hook at 4, then press F3, the material hook reaches the 13 grabbing position, Press F4, the material hook reaches 14, close the middle furnace door, the lifting table goes down to the oil tank, and the material hook returns to the original position.Sintering of B4C by Pressureless Liquid Phase Sintering

Since the birth of precalcining kiln in the early 1970s, it has gone through four stages of development. (1) The first stage. Early to mid 1970s. It is the birth and development stage of pre-decomposition technology.Metallographic Inspection Knowledge of Bolt Quenching And Tempering In 1964, the German Dottenhausen cement plant used oil shale containing combustible components as a component of cement raw materials. In order to avoid premature volatilization of combustible components in the low-temperature part, they fed oil-bearing shale raw meal in the middle of the suspension preheater to increase the decomposition rate of raw meal entering the kiln, creating a precedent for pre-decomposition technology.Ion Nitriding vs Gas Nitriding But the precalciner kiln that really uses advanced fuel as the second heat source in the calciner started in 1971. Therefore, the birth of precalciner kiln should be the first SF kiln (Suspension Preheater-Flash Furnacel) jointly developed by Japan IHI Company and Chichibu Cement Company. Vacuum Heat Treatment of FastenersAfter the birth of the first SF kiln, various types of precalciner kilns appeared one after another in Japan (MFC furnace of Mitsubishi Corporation - 1971; RSP furnace of Onoda Cement Company - 1972; KSV furnace jointly developed by Kawasaki and Ube Cement Company - 1974 year, etc.). All calciners use heavy oil as fuel.Sintering of B4C by Pressureless Liquid Phase Sintering

Bell furnace is a kind of heat treatment furnace, which consists of a heating mantle, two movable furnace seats, two inner mantles and a valve frame. The heating mantle is made of steel plate rolled into a circle and welded. Vacuum Carburizing Technology of Automobile Connecting RodOn the upper part of the mantle body there is a position for hoisting and changing the mantle, on the lower part there are three supporting feet for supporting the furnace mantle, and at the bottom there is a sand-sealing knife, which is used during heating. The heating mantle can be directly pressed on the flange of the furnace inner mantle to achieve a sealing effect.Vacuum sintering systems The furnace cover is sealed with the furnace body through the supporting feet and the sand sealing knife, while the inner cover is sealed with the furnace cover through the supporting feet and the sand sealing knife. Applications of vacuum brazingThe furnace cover is also equipped with a cylinder-driven mechanical seal mechanism, which achieves the sealing effect by pressing the sealing surface between the furnace cover and the inner cover, and injecting nitrogen into the seal. The bell furnace has the advantages of uniform heating temperature, accurate temperature control, energy saving, less environmental pollution, quick start-up and quick stop of the equipment, and can be used for vacuum, positive pressure or atmosphere treatment, but the equipment is huge, the sealing mechanism is complex, and the maintenance volume is large. ,costly.Low alloy wear-resistant steel and its vacuum heat treatment process

Click the "Furnace Body Seal Loosen" button until the computer screen displays "Furnace Body Seal Loosen in Place"; click the "Furnace Door Up" button until the computer screen displays "Furnace Door Up in Place"; click "Trolley Out" button until the trolley comes out of the furnace as a whole and does not touch the limit baffle on the track.Sintering of B4C by Pressureless Liquid Phase Sintering Hang down the charging rack on the furnace body, check the aluminum alloy single wires that have been inspected by the quality inspection team, classify the aluminum alloy single wires with the same resistance and similar tension according to the same model, and then place the aluminum alloy single wires neatly on the charging rack on, and make a record. When installing the wires, it should be ensured that there should be a certain gap between every two trays for air circulation.Vacuum Heat Treatment of Fasteners Hoist the installed loading racks on the trolley one by one, and keep the loading racks stable during hoisting to prevent the loading rack from shaking and damaging the insulation layer of the trolley. And check whether there are protrusions on both sides of the trolley to prevent the furnace wall from being scratched when entering the furnace, Silicon Carbide Reaction Sintering Processand check whether there are sundries on the trolley track that affect the trolley entering the furnace. After the inspection is normal, press the "trolley in" button until the computer screen displays "trolley in place"; press the "furnace door down" button until the computer screen displays "furnace door down in place"; click "furnace body Press the button until the computer screen displays "The furnace body is sealed and pressed in place".Vacuum sintering of transparent ceramics

First of all, it is the control of the temperature in the furnace. Industrial furnaces need to control the temperature during the heating process to achieve safe and stable production. However, if the control system in the furnace fails or is improperly adjusted, the temperature will be out of control, causing the temperature to be too high or too low, causing equipment failure or explosion.316L stainless steel vacuum brazing process In addition, due to the high temperature in the furnace, if you accidentally open the operation door or the observation port, etc., it may cause the staff to be burned by the heat in the furnace. Secondly, it is the damage and aging of the furnace body. Vacuum heat treatment of aluminum alloy die castings Due to the frequent work of industrial furnaces, the internal metal materials may be damaged and aged due to high temperature and corrosion. This situation will not only lead to a decrease in work efficiency, but may also cause cracks in the furnace body, which may cause an explosion. Therefore, regular inspection and maintenance is very necessary.Vacuum Oil Quenching for steel hardening heat treatment Furthermore, it is the leakage of energy supply materials such as gas and fuel oil. If these materials leak into the environment during operation, it may cause major hazards such as suffocation and poisoning to workers, and cause explosions and other accidents. Therefore, when using an industrial furnace, attention should be paid to checking the inside and outside of the furnace and the burner and other equipment to ensure that there is no leakage.MIM degreasing and sintering for ceramic hard alloy