Vacuum Heat Treatment And Quenching Advantages

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By the rapid development of the vacuum heat treatment and high pressure gas cooling quenching technology, there appeared the high negative pressure gas cooling flow rate, pressure air cooled and high pressure gas cooling, new technologies, such as ultrahigh pressure gas cooling not only greatly improved the ability of vacuum cooling quenching heat treatment, and after quenching workpiece surface brightness is good, small deformation, and the advantages of high efficiency, energy saving, no pollution.

In addition to the oxide scale, is there any difference in hardness between vacuum treatment and ordinary treatment at the same temperature?Is there any other difference? In the heat treatment, why the ordinary heat treatment is not, but to choose to use vacuum heat treatment? Shanghai Gehang Vacuum Technology Co., Ltd. is a professional manufacturer of vacuum heat treatment equipment, with more than 20 years of experience in production, design, research and development.

Vacuum heat treatment is a new heat treatment technology that combines vacuum technology and heat treatment technology. The vacuum environment in which the vacuum heat treatment is located refers to the atmosphere environment under one atmosphere pressure, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum. Vacuum heat treatment actually belongs to the atmosphere control heat treatment.

Vacuum heat treatment means that all and part of the heat treatment process is carried out in vacuum. Vacuum heat treatment can realize almost all the heat treatment processes that can be involved in conventional heat treatment, but the quality of heat treatment is greatly improved.Compared with conventional heat treatment, vacuum heat treatment at the same time, can achieve no oxidation, no decarburization, no carburizing, can remove the surface of the workpiece phosphorus chips, and has the effect of degreasing and degassing, so as to achieve the effect of surface brightness and purification.

And the price of vacuum heat treatment is high because the equipment is expensive, energy consumption; Each furnace weight is small because the vacuum chamber is small, easy to vacuum; The workpiece after vacuum heat treatment has stronger oxidation resistance and corrosion resistance than the workpiece after ordinary heat treatment, and the microstructure is denser.

Its advantages are as follows:
1. No oxidation, no decarburization and rust removal effect, save the surface grinding process, thus saving the consumption of steel and raw materials, save processing time.

2. Degassing effect.The gas dissolved into the metal at normal pressure, in the negative pressure from the metal to the surface of the diffusion and overflow, this phenomenon is called degassing.Vacuum quenching heating has the degassing property, so that the purity of the material surface is improved, thus improving the fatigue and plasticity of the die.Toughness and corrosion resistance.

3. It is helpful to remove the residual oil on the surface of the workpiece and improve the quality of the product.

4. There is no danger of hydrogen embrittlement in the processed parts to prevent the surface embrittlement of titanium and insoluble metals.

5. Small heat treatment 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 temperature difference of the workpiece section is small, the thermal stress is small, so it will not produce greater deformation due to the action of external forces.In general, vacuum quenching deformation salt bath quenching 10%~50%.

6. Vacuum quenching process is stable, good repeatability, safe operation, high degree of automation, clean working environment, pollution-free, pollution-free.

Editor: Frank Lee
Copyright: SIMUWU vacuum furnace

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