vacuum equipment

Vacuum annealing furnace is a kind of vacuum furnace in which vacuum system is assembled by vacuum pump, vacuum measuring device, vacuum valve and other components, and some substances in the chamber are discharged, so that the pressure in the chamber is less than a standard atmospheric pressure, and the space in the chamber can realize the vacuum state. The vacuum furnace is generally composed of a main engine, a furnace, an electrothermal device, a sealed furnace shell, a vacuum system, a power supply system, a temperature control system and an outside conveyor. The sealed shell is welded with carbon steel or stainless steel, and the joint surface of the detachable part is sealed by vacuum sealing material. In order to prevent the deformation of the shell after heating and the deterioration of the sealing material, the furnace shell is usually cooled by water cooling or air cooling. The furnace is located in the sealed furnace shell. According to the use of the furnace

Compared with other processing technology, metal heat treatment generally does not change the shape of the workpiece and the overall chemical composition, but by changing the microstructure of the workpiece, or by changing the chemical composition of the workpiece surface, endow or improve the workpiece performance. Metal heat treatment is characterized by improving the internal quality of the workpiece, which is not generally visible to the naked eye. In order to make the metal workpiece have the required mechanical, physical and chemical properties, heat treatment process is often an important process step in addition to the rational selection of materials and forming process. Iron and steel is a kind of material widely used in machinery industry. The microstructure of iron and steel is complex and can be controlled by heat treatment. So the heat treatment of iron and steel is the main content of metal heat treatment. In addition, Al, Cu, Mg, Ti and their alloys can al

Equipment use: Vacuum carbon tube furnace is a high temperature, high vacuum resistance furnace using graphite as a heating element. The maximum working temperature can reach 2000 °C ~ 2400 °C. This series of products are widely used in inorganic materials (such as ceramic seals, silicon carbide, zirconia, zinc oxide, alumina, etc.), and metal materials (such as cemented carbide) sintered in a vacuum or protective atmosphere, can also be used Purification of rare earth elements and their oxides and sapphire annealing treatment. It is also suitable for use in colleges and universities and research institutes for pilot production. Brief introduction of the structure: The electric furnace is a vertical vacuum electric furnace, which is composed of a furnace cover, a furnace body, a furnace bottom and a vacuum unit. The inner layer of the furnace shell is stainless steel, and the outer layer is carbon steel, and the two layers are cooled by water. The furnace shell is provid

Stainless steel vacuum cup has made great progress in China since the reform and development, especially in the past decade. Our company has developed more than 50 series of vacuum cups and pots, hundreds of varieties, is still in constant development, production, variety with each passing day. Vacuum cups are simply divided into tailless vacuum cups (or holistic vacuum cups) with tailed vacuum cups according to their production methods. The tail vacuum cup is obtained by vacuum exhaust platform, similar to glass thermos bottle and large electronic tube. On the vacuum exhaust platform, vacuum cup is inserted (bottom of the vacuum cup is welded with exhaust copper pipe). When the vacuum is less than 2 *E23Pa, the copper pipe is cut and polished with hydraulic clamps, and then the following processes are carried out: painting, gluing, electrolysis, polishing, pressing and packing. The tailless vacuum cup is formed in a vacuum brazing furnace by vacuum pumping, vacuum brazi

In recent years, due to the rapid development of vacuum heat treatment furnace, great breakthroughs have been made in vacuum brazing, vacuum sintering, vacuum annealing and other heat treatment processes. In many vacuum heat treatment processes, high temperature rapid cooling process is required, which makes the strong cooling system become a necessary structural component of most vacuum heat treatment furnaces. The structure of the strong cooling system of the vacuum heat treatment furnace is generally composed of three parts: the fan, the heat exchanger and the cooling air duct. The structural types of the strong cooling system can be generally divided into two types: internal circulation and external circulation. It is necessary to choose the structure type of the strong cooling system according to different furnace type and technical requirements. The structure type and design scheme of the two kinds of strong cooling systems are introduced respectively. Strong cooli

Its advantages lie in: 1. No oxidation, no decarbonization and rust removal, eliminating the surface grinding process, thus saving steel and raw material consumption, saving processing time. 2. degassing. Gases dissolved in metals at atmospheric pressure diffuse from the inside of the metal to the surface and overflow at negative pressure. This phenomenon is called degassing. Vacuum quenching heating has degassing characteristics, so that the surface purity of the material is improved, thereby improving the fatigue and plasticity of the mold. Toughness and corrosion resistance. 3., it is beneficial to remove residual oil and improve product quality. 4. the treated parts have no hydrogen embrittlement risk to prevent surface embrittlement of titanium and insoluble metals. 5. heat treatment has little distortion. Because the vacuum heating is slow, the temperature difference between inside and outside the workpiece is small; vacuum heating is generally preheated 1-2 times,

The principle of the vacuum furnace is to use the vacuum system to discharge some of the material inside the furnace chamber, so that the internal pressure is lower than a standard atmospheric pressure, so that there is a vacuum transition in the furnace. The earliest record of vacuum furnace is the 1930s, 1927 made in the United States electrical materials vacuum annealing furnace. In 1953, vacuum consumable electric arc furnace has been used in smelting titanium sponge in industry. Before and after 50s, vacuum furnaces were widely used in industry. In 1960, the United States developed an oil quenching vacuum furnace. The main characteristics of vacuum furnace are: 1, the pressure inside the furnace can be drawn into industrial furnace below atmospheric pressure. 2. Electric heating in vacuum furnace, the surface of the heated workpiece is not oxidized, not decarbonized, small deformation, good mechanical properties. 3. Smelting metal with vacuum furnace is beneficial t

Oxidation corrosion is one of the fatal defects in product parts. In the past, many products of a domestic company were quenched by salt furnace. When the rainy season comes, the parts must be surface treated within a week. Otherwise, the residual salt will corrode the workpiece, which will lead to the quality problem of batch scrap. In this season, the problem is usually solved by surface treatment immediately after heat treatment. However, due to the large output and variety of products, this method aggravates the workload of the surface treatment workshop during the construction period, resulting in pressure on production arrangements. In order to alleviate this pressure and achieve balanced production, VQ02-100 type oil quenching vacuum furnace was introduced. Oxidation corrosion is one of the fatal defects in product parts. In the past, many products of a domestic company were quenched by salt furnace. When the rainy season comes, the parts must be surface treated w

Leak detection in vacuum system of vacuum heat treatment furnace is a big problem that often occurs in production.There are a lot of information about leak detection technology.This paper puts forward the treatment method when the vacuum system breaks down in use.It is based on the theoretical analysis of different time and conditions that the possible position of leak can be judged. It is known from the field experience that the leak detection by analytic method can not only reduce the cost but also accommodate the shortcomings of the leak detection instruments which are not available in general small factories. For vacuum heat treatment furnace leak detection, including furnace body and vacuum system two parts. When the furnace body and vacuum system are assembled, no matter how reliable the seal is, there is always some leakage. Therefore, the leakage rate is used as an important performance index of the heat treatment furnace. Leakage rate refers to the gas flow rate

The arrangement method of graphite rod heating elements arranged on both sides of the heating chamber is especially suitable for high vacuum furnace. In high vacuum atmosphere, the heat radiation zone produced by the heating elements on both sides can heat the workpiece uniformly. When the furnace temperature is between 400 and 1300 degrees, the temperature difference of each point in the heating zone can reach + 5 K. Before 60s, temperature control has always been one of the main problems in heat treatment technology. Later, due to the use of electronic temperature control technology, this problem has been solved. At present, from the point of view of temperature distribution, the accuracy of temperature distribution in hot spots is an important issue. Almost always, we have to give priority to trying to achieve a uniform temperature in the structure of the hot zone, and for some reason the temporary temperature inhomogeneity in the hot zone will disappear with the e

A three-dimensional finite element model of vacuum brazing furnace heater was established. The distribution of temperature field, voltage and current density of heater during the process of transforming current into Joule heat and transferring heat to surrounding environment by radiation heat transfer was simulated by thermoelectric coupling element. Meanwhile, the overall Joule heat generation and radiation heat loss during the process are obtained by extracting post-processing data. Numerical simulation of welding thermal process has been widely used, and its technology is becoming more and more mature and perfect. However, the simulation of vacuum brazing thermal process is relatively lacking. The heat process of vacuum brazing is characterized by the integrity of heating, the fixity and continuity of heat source, and the simplicity of heat transfer process, radiation heat transfer. Heating body is the most important part of the whole vacuum brazing furnace. It transfer

In order to better explain the electrical control system, the mechanical structure of this type of vacuum aluminum brazing furnace is first introduced, as shown in Figure 1. The main body of the vacuum aluminum brazing furnace is composed of a heating chamber, a furnace body, a front and back stove door and various functional parts. The heating chamber is installed in the furnace body and consists of a plurality of heating resistors and insulation layers. The heating resistors are connected by the electrodes and cables outside the furnace body to form 28 heating zones. Each zone is powered by a set of thyristor voltage regulating power supply circuit. The furnace body is a double-layer water-cooled jacket structure with the necessary functional components of brazing furnace welded on it. The front and rear doors are also double-layer water-cooled jacket structure, which can be mounted on the door car which can move vertically along the axis of the furnace body. The door ca

According to the inside and outside of the heater in the vacuum vessel, the vacuum heat treatment furnace can be divided into internal heating furnace and external heating furnace. 1. Externally heated vacuum heat treatment furnace In this vacuum furnace outside the furnace can have ordinary air furnace, through the vacuum container heating, the workpiece side-heating. The heat treatment furnace has poor thermal efficiency and long cooling time. In addition, due to temperature difference between the workpiece and furnace, vacuum external pressure will also lead to deformation and damage of the furnace. Although the heat treatment furnace is cheap, it is not suitable for actual industrial production. 2. Internal thermal vacuum heat treatment furnace is a vacuum vessel with electric heater and insulator, the vessel itself is water-cooled. When the temperature is low, only the vacuum seal part is water cooled or not cooled. Compared with the external thermal type, the int

We introduced vacuum oil quenching furnace and gas quenching furnace, today we introduce vacuum sintering furnace. METAL HEAT TREATMENT: INDUCTION HEATING HEAT TREATMENT Vacuum sintering furnace is a kind of furnace for protecting and sintering the heated articles in a vacuum environment. Vacuum induction furnace is a kind of furnace, which can be divided into frequency, intermediate frequency and high frequency, and can be classified as a subclass of vacuum sintering furnace. Vacuum induction sintering furnace is a complete set of equipment for sintering cemented carbide tool head and various metal powder compactor under the condition of vacuum or protective atmosphere by using medium frequency induction heating. It is designed for industrial production of cemented carbide, dysprosium metal and ceramic materials. VSWF vacuum induction tungsten sintering hydrogen furnace BRAZING TECHNOLOGY IN DIAMOND TOOLS APPLICATION One, the main principle and use vacuum induction

What is the material of heat exchanger in vacuum hot water boiler? The heat exchanger in the boiler USES SUS304 stainless steel tube. The pipe is not easy to scale, high heat transfer efficiency, and will not rust. Why is the hot medium water in the vacuum hot water boiler heated in the vacuum state? Water under different pressure, the boiling temperature is different, in an atmospheric pressure (0.1 Mpa), water boiling temperature is 100 ℃, and under the pressure of 0.8 Kpa, water boiling temperature of 4 ℃. Vacuum hot water boiler is in vacuum 2.67 Kpa ~ 66.6 Kpa pressure within the scope of work, the corresponding saturation temperature is 15 ℃ ~ 85 ℃. So in a vacuum, it's very easy for the hot water to boil and vaporize. Why must vacuum in operation of vacuum water boiler? When noncondensable gas is produced inside a vacuum boiler, the pressure will rise, which is called vacuum destruction. The non - condensable gas produced in vacuum boiler has serious influence o

When the vacuum furnace is used, it is necessary to measure the temperature at 9 o 'clock. Let's find out! First of all, it is confirmed that all the instruments are effective. According to on-site product and process execution, nine samples are taken for inspection, and the test content includes hardness and metallographic structure. Then, it is determined whether all samples taken at the nine-point position are unqualified. Measuring temperature at 9 o 'clock is not difficult actually, according to present condition, have 3 kinds of methods to be able to achieve. 1. There is only one single channel thermometer, which is measured by manually rotating each channel, so that the error of each channel is consistent and can truly reflect the deviation in the furnace. 2. There is a patrol instrument that can automatically switch each channel signal, but only replace example 1 with automatic switch. 3. There is a multi-channel recorder (of course, 12 channels or abo

Compared with the external  heat treatment furnace , the internal heat vacuum heat treatment furnace has more complicated structure and control system, higher manufacturing and installation accuracy, more difficult debugging and more expensive cost. But the internal heating vacuum heat treatment furnace has small inertia, high thermal efficiency, can realize rapid heating and cooling, high operating temperature. At present, the internal heating vacuum furnace has been successfully developed and used in production. At the same time, the internal heating vacuum furnace can be large-scale, convenient for continuous operation, high degree of automation and high production efficiency. . In recent ten years, the internal heating vacuum furnace has developed rapidly and become the main type of vacuum heat treatment furnace.  THE ADVANTAGES OF THE INTERNAL HEAT VACUUM FURNACE MAINLY INCLUDE THE FOLLOWING SEVEN POINTS:  1. large scale high temperature furnace can be manufactured withou

SUMMARY OF VACUUM DEGREASING SINTERING FURNACE  The  vacuum degreasing sintering furnace  comprises a furnace seat and a sintering furnace fixed thereon, and also includes a water cooling device, a vacuum device and a degreasing device connected with the sintering furnace; the sintering furnace comprises a furnace door and a furnace body; the furnace body is provided with an internal heat insulation, a graphite storage tank, a pulley, a bracket and an outlet pipe; and the vacuum device comprises a vacuum tube, a pneumatic tube. High vacuum baffle valve, first bellows shock absorber, Roots vacuum pump, second bellows shock absorber, rotary vane vacuum pump, vacuum pump base and exhaust pipe; water cooling device includes the backwater tank outside the furnace and the circulating water pipeline connected with it. The advantages of the vacuum degreasing sintering furnace are novel structure, good sealing performance and thermal insulation performance, and good stability when the vacu

The development of vacuum induction melting technology and the application of induction smelting technology in different occasions.  According to the structure of different vacuum induction furnaces, their advantages and disadvantages are compared. Looking forward to the future development of vacuum induction furnace, the development trend of vacuum induction furnace is expounded. The development and progress of vacuum induction furnace are mainly reflected in the gradual improvement of the overall structure of the equipment, the increasingly obvious trend of modularization and the more intelligent control system. 1. VACUUM INDUCTION MELTING TECHNOLOGY 1.1. Principle Induction heating technology usually refers to the vacuum conditions, through the principle of electromagnetic induction to better inductive magnetic materials to obtain induction current, to achieve the purpose of heating a technology. Current passes through the electromagnetic coil around the metal at a cert

The development of vacuum induction melting technology and the application of induction smelting technology in different occasions.  According to the structure of different vacuum induction furnaces, their advantages and disadvantages are compared. Looking forward to the future development of vacuum induction furnace, the development trend of vacuum induction furnace is expounded. The development and progress of vacuum induction furnace are mainly reflected in the gradual improvement of the overall structure of the equipment, the increasingly obvious trend of modularization and the more intelligent control system. 1. VACUUM INDUCTION MELTING TECHNOLOGY 1.1. Principle Induction heating technology usually refers to the vacuum conditions, through the principle of electromagnetic induction to better inductive magnetic materials to obtain induction current, to achieve the purpose of heating a technology. Current passes through the electromagnetic coil around the metal at a cert