Mastars' rapid prototyping service can provide various prototyping services according to customers' needs, verify your designed, provide fast, efficient and cost-effective services, and lay the foundation for future mass production of your products. General stainless steel heat treatment processes include: solution treatment, stabilization treatment and stress relief treatment.

The main features of heat treatment of stainless steel are: non-magnetic austenite structure at room temperature, low yield strength ratio, good plasticity, good weldability, easy smelting, casting, forging and hot forming; Its composition is characterized by high chromium (≥ 17%), nickel (8%-15%) and other elements that improve corrosion resistance (such as molybdenum, niobium, titanium, etc.). Therefore, austenitic stainless steel not only has good corrosion resistance, but also has good mechanical and technological properties, so it has been widely used in mechanical equipment.

1. Stress relief treatment

Stress relief treatment is a heat treatment process to eliminate the residual stress of steel after cold working or welding. It is generally heated to 300-350 ℃ for tempering. For steels without stabilizing elements Ti and Nb, the heating temperature shall not exceed 450 ℃, so as to avoid precipitation of chromium carbides and intergranular corrosion. For cold worked and welded parts of ultra-low carbon and stainless steel containing Ti and Nb, they should be heated at 500-950 ℃ and then cooled slowly to eliminate stress (the upper limit temperature is taken for eliminating welding stress), which can reduce the tendency of intergranular corrosion and improve the stress corrosion resistance of steel.

2. Stabilization treatment

Generally, it is carried out after solution treatment. It is commonly used for steel containing Ti and Nb. After solution treatment, the steel is heated to 850-880 ℃ for heat preservation and air cooling. At this time, the carbides of Cr are completely dissolved and fully precipitated during cooling, so that the carbon can not form chromium carbides again, so the intergranular corrosion is effectively eliminated.

3. Solution treatment

After the steel is heated to 1050-1150 ℃ and then water quenched, the main purpose is to dissolve the carbides in austenite and keep this state to room temperature, so that the corrosion resistance of the steel will be greatly improved. This is a heat treatment method to prevent intergranular corrosion. For thin-walled parts, air cooling can be used. Generally, water cooling is used

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