Quenching heat treatment

In the heat treatment industry, what are the misunderstandings about quenching and heat treatment? Today Xiaobian will come to talk with you about the misunderstanding of quenching and heat treatment.vacuum-furnace-for-metal-smelting

1. The workpiece after quenching and heat treatment is not cold to room temperature, and can not be tempered?vacuum-heat-treatment-process

Some people think that after quenching heat treatment, the tempering heat treatment process can not be entered before cooling to room temperature. In fact, many kinds of steels, especially low and medium carbon steels, have higher martensite transformation end point than room temperature. When they are cooled to room temperature, they tend to crack. After quenching heat treatment, they can be transferred to tempering heat treatment process as soon as possible.

2. Quenching and heat treatment of the workpiece must be tempered with temperature?plasma-nitriding-furnaces

It is not advisable to use this method. The temperature before tempering after quenching should be determined according to the martensitic transformation point of steel grades. In order to prevent quenching cracking, we can not speculate on it. Tempering with temperature is adopted in a general way.vacuum-induction-melting-furnaces

Heat Treatment of Automotive Parts

There are five main heat treatment processes for automobile parts: annealing and normalizing, quenching, tempering, aging and tempering, surface quenching and chemical heat treatment. Today, Xiaobian mainly introduces several commonly used heat treatment processes for automotive parts.Industrial-vacuum-pressure-free-sintering-furnace-for-diamond-segments

1. Carburizing Heat Treatment of Automotive Parts

The main purpose of carburizing heat treatment is to obtain good fatigue resistance and wear resistance of parts and to ensure the reliability of Parts'performance. Generally, differential gear, transmission shaft gear, steering shaft gear, engine piston and gear parts of automobile drive axle need carburizing heat treatment.vacuum-furnace-range-up-to-3000c

2. Tempering and Heat Treatment of Automotive Parts

The quenching and tempering heat treatment of automobile parts can be divided into protective atmosphere quenching and tempering heat treatment and general quenching and tempering heat treatment. Protective atmosphere conditioning and heat treatment can ensure that parts do not produce surface oxidation, peeling and other defects in the process of heat treatment, and ensure the surface quality of parts. If the quenched and tempered parts need follow-up processing, general heat treatment is carried out.Industrial-vacuum-gas-quenching-furnace-with-high-pressure

Heat treatment of aluminium alloy

The purpose of casting heat treatment of aluminium alloy is to improve mechanical properties and corrosion resistance, stabilize dimensions, and improve processing properties such as cutting and welding. Because the mechanical properties of many as-cast aluminium alloys can not meet the application requirements, except for ZL102 of Al-Si system, ZL302 of Al-Mg system and Zl401 of Al-Zn system, the other casting aluminium alloys need to be further improved by heat treatment of aluminium alloys, which include the following aspects:Three-chamber-Horizontal-Oil-and-Gas-Quenching-Vacuum-Furnace

(1) Eliminate the internal stress caused by uneven cooling rate during solidification due to the structure of castings (uneven wall thickness, large thickness of junction), etc.High-Temperature-Metal-Melting-Furnace

(2) Improve the mechanical strength and hardness of the alloy, improve the metallographic structure, and ensure that the alloy has certain plasticity, cutting and welding properties.

(3) Stabilizing the structure and size of castings, preventing and eliminating high temperature phase transformation and changing the volume;

(4) Eliminate intergranular segregation and component segregation to homogenize the structure.Box-type-lab-inert-gas-vacuum-heat-treatment-furnace

Induction Melting Heating Technology

Induction melting is a kind of induction heating technology. After countless research and development, induction melting equipment has a brand-new technical outlook.

As we all know, the great scientist Faraday founded the concept of modern induction heating, which was based on the change of current in the primary coil and the induction of current in the close secondary coil. In the heating process of metal workpiece, a layer of induction coil should be added outside the workpiece that needs heating. When a certain frequency AC passes through the winding induction coil outside the metal, a frequency alternating flux can be generated automatically. Under the action of alternating flux, the metal workpiece will generate an induction potential, and then a certain induction current will be generated and recharged. The heating effect of overcurrent on metal can finally achieve the purpose of heating the workpiece.high-temperature-vacuum-furnace

Induction melting technology has the characteristics of fast melting speed, reducing the loss caused by oxidation in the process of smelting metal. It can also be used in special processes, such as vacuum melting. Vacuum and induction heating technology can not only avoid oxidation and decarbonization caused by combustion, but also can be used to produce alloys that can not be produced by other methods. In Nd-Fe-B smelting industry, vacuum and induction heating technology has developed to a relatively mature stage.vacuum-heat-treatment-furnace-price

Induction heating technology has been fully developed and applied in China, especially in the automotive field. Induction heating technology has played a more unusual role. In the heat treatment of automotive parts, the weight of parts treated by induction heating has accounted for more than 60% of the total heat treatment parts. Therefore, in order to better apply this technology in more fields, we must also conduct in-depth research and Discussion on induction heating technology.buy-vacuum-furnace

Vacuum brazing furnace principle

The vacuum brazing furnace is a furnace for performing maintenance sintering on the object to be heated in a vacuum environment, and the heating method is relatively high, such as resistance heating, induction heating, microwave heating, and the like. The vacuum induction furnace is a furnace that performs maintenance sintering on the heated article by induction heating, and can be classified into a power frequency, an intermediate frequency, a high frequency, and the like, and can be attributed to a subclass of the vacuum brazing furnace.lab-use-small-volume-vacuum-induction-melting-furnace

The vacuum induction sintering furnace is a complete set of equipment for sintering cemented carbide tips and various metal powder restraints by using the principle of medium frequency induction heating under vacuum or maintenance atmosphere. It is made of cemented carbide, metal tantalum and ceramic materials. Planned for industrial production. VSWF vacuum induction tungsten sintering hydrogen furnace I, the first principle and the use of vacuum induction tungsten sintering furnace is under the condition of hydrogen charging after vacuuming, using the principle of medium frequency induction heating, so that the tungsten crucible in the coil generates high temperature, after heat radiation conduction At work, it is suitable for scientific research and military units to form powder sintering of refractory alloys such as tungsten, molybdenum and their alloys.hydrogen-sintering-furnaces

Second, the primary layout and composition The layout methods are mostly vertical and lower discharge methods. The primary group becomes: electric furnace body, vacuum system, water cooling system, pneumatic system, hydraulic system, feeding and discharging mechanism, base, work table, induction heating equipment (tungsten heating body and high-grade insulation material), power feeding equipment, intermediate frequency power supply and Electrical control system, etc.hydrogen-annealing-furnaces

 Third, the primary function After the vacuum is filled with hydrogen maintenance gas, control the furnace pressure and atmosphere sintering conditions. The optical fiber infrared radiation thermometer and the armored thermocouple can be connected to the temperature measurement (0～2500°C), and after the intelligent temperature controller is compared with the setting program, the performance status feedback is selected to the intermediate frequency power supply, and the temperature concave and convex and the heat preservation are automatically controlled. program.medium-temperature-hydrogen-furnace

vacuum atmosphere furnace characteristics

With the development of electronic information technology and economic prosperity, soft ferrite materials are more and more inclined to high-grade, small batch, multi-variety, short delivery period, good consistency and so on. In the past, the push-plate vacuum atmosphere furnace has gradually failed to meet the requirements of this high-grade product and changeable. The bell-shaped furnace came into being. The traditional soft ferrite manufacturers in the world have ordered the bell-shaped furnace. Laboratory-vacuum-tube-furnace-for-vacuum-atmosphere

With China's accession to the WTO, domestic ferrosilicon manufacturers have begun to experiment in order to adapt to the needs of the market, and have begun trials to produce high-end products. The market demand for bell jar furnaces has become increasingly urgent. Now according to the needs of the market, with reference to foreign similar equipment, we have developed a new generation of sintering equipment - bell-type vacuum atmosphere furnace series products, which use all-fiber high-temperature furnace lining, partition grouping and other technologies, with large batch output, temperature It has excellent uniformity of atmosphere, high consistency of sintered products and high yield. Compared with tunnel kiln, it is more flexible and has higher control precision, especially suitable for sintering and other products.1600-C-ceramic-sintering-furnace

The task of the bell-type vacuum atmosphere furnace is to achieve the desired purpose in a certain space. In addition, for the production type vacuum atmosphere furnace, the focus should be on the uniformity of temperature and atmosphere in an even small working area. Only when the temperature and atmosphere uniformity meet certain requirements can the consistency of batch sintered products be guaranteed.690-vacuum-melting-of-nickel-base-alloy-for-desulfurization

Internal Heating Vacuum Heat Treatment Furnace

Vacuum heat treatment furnace includes vacuum annealing furnace, vacuum sintering furnace, high temperature and high pressure vacuum furnace, vacuum heating furnace, atmosphere vacuum furnace, vacuum tube furnace, vacuum box furnace, etc. Vacuum heat treatment furnace is divided into external heat treatment furnace and internal heat treatment furnace.

The structure of the internal heat vacuum heat treatment furnace is that the whole heating device (heating elements, refractories) and the workpiece to be treated are placed in the vacuum container, without the furnace tank, the whole furnace shell is a vacuum container. The furnace is equipped with electric heating elements, heat insulation screen, hearth, fan, conveyor and other components. The shell of the furnace is usually designed by double-layer water-cooling, so it can also be called cold-wall vacuum furnace.Vacuum-Sintering-Furnace-for-metal-parts-heat-treatment

Electric heating elements are mostly located in the middle of the heating chamber. They are arranged around the effective heating zone of the workpiece. The external structure is a metal radiation screen or a non-metal heat insulation screen. The furnace bed is installed in the lower part of the heating chamber. The fan structure is located in the cooling chamber. There are also heating and cooling systems installed at one end of the heating chamber, the upper part or the lower part, and the heat exchanger device constitute a forced air circulation heating and cooling system. The transfer mechanism is mostly located in the cooling chamber, some of which are connected with the material basket bracket outside the furnace. Different types of structure are adopted according to the use and some special requirements. The heating electrode is introduced through the furnace shell. The water cooling and sealing structure of the heating electrode should be considered in the design to ensure its good working characteristics.powder-metallurgy-heat-treatment-vacuum-sintering-furnace

At present, the internal heat vacuum heat treatment furnace has various forms. According to its shape and structure, it can be divided into vertical, horizontal, single chamber, double chamber and three chambers. The working cooling modes are divided into self-cooling, negative pressure gas-cooling, negative pressure oil-cooling and pressurized gas-cooling (2x10pa), high pressure gas-cooling (2x10pa) and ultra-high pressure gas-cooling (20x10pa). According to heat treatment technology, it is divided into quenching furnace and tempering furnace. It has single function and multi-function.Vacuum-induction-sintering-furnace-for-smelting-metal-powder