Vacuum Heat Treatment: Rejuvenate Metals

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Vacuum Heat Treatment: Rejuvenate Metals

Vacuum heat treatment is a new type of heat treatment technology that perfectly combines vacuum technology and heat treatment technology. Simply put, it is to place part or all of the heat treatment process in a vacuum environment. This vacuum environment can be various levels from low vacuum to ultra-high vacuum. Vacuum heat treatment not only belongs to atmosphere control heat treatment, but can also be widely used in ceramic firing, vacuum smelting, electric vacuum parts degassing, annealing, metal parts brazing, and ceramic-metal sealing.

Quenching, annealing, brazing, sintering and other treatments under vacuum can obtain better material properties and product quality. However, despite the many advantages of vacuum heat treatment, in practical applications, it is still necessary to pay attention to controlling process parameters and operating specifications to ensure treatment effects and product quality. Different types of vacuum heat treatment furnaces have different specifications and applicable ranges, and it is crucial to choose the right equipment.

Vacuum heat treatment can achieve almost all conventional heat treatment processes, but the quality is greatly improved. It has the advantages of no oxidation, no decarburization, no carburization, etc. It can also remove phosphorus chips on the surface of the workpiece, and has the functions of degreasing and degassing, thereby achieving the effect of surface brightening and purification. In addition, under the action of vacuum degassing, the physical and mechanical properties of metal materials can also be significantly improved.

When formulating vacuum heat treatment process regulations, we can follow the principle of solid phase change under normal pressure and refer to the data of various types of organizational transformation under normal pressure. With the continuous advancement of related technologies, my country has been able to provide a full set of processing equipment that meets various processing needs, such as vacuum high-pressure gas quenching furnace, vacuum oil quenching furnace, vacuum annealing, vacuum sintering furnace, etc., as well as related supporting facilities, such as vacuum pumps, vacuum valves, vacuum measuring instruments, etc.

The main advantages of vacuum heat treatment include:
No oxidation: In a vacuum environment, there is no oxygen, which can avoid the oxidation problem of the workpiece surface and keep the original metallic luster of the workpiece.
No decarburization: In a vacuum state, carbon elements will not react with oxygen, thereby avoiding the decarburization problem of the workpiece and ensuring the stability of the chemical composition of the workpiece.
No carburization: Vacuum heat treatment can effectively prevent the occurrence of carburization, that is, during the heating process, carbon elements will not diffuse from the high carbon area to the low carbon area, ensuring the uniformity and stability of the workpiece.
Surface purification: Vacuum heat treatment can remove impurities such as phosphorus chips and oil stains on the surface of the workpiece, making the surface of the workpiece bright and purified.
Improve performance: Vacuum heat treatment can change the organizational structure of the workpiece and improve its mechanical properties, corrosion resistance, wear resistance and other aspects.

In short, vacuum heat treatment is an efficient and precise heat treatment technology that can significantly improve the performance and quality of metal materials. In practical applications, the reasonable selection of equipment and process parameters will help to better play its advantages.

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Vacuum Heat Treatment: Rejuvenate Metals

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