Generally, when stainless steel screws are thermally tr […]
Generally, when stainless steel screws are thermally treated, they are selected based on the hardness of the screws themselves. Commonly used thermal treatments include: red hot treatment, chemical thermal treatment, and some thermal treatments. The first two types of thermal treatment are planned as a whole. After all, that type of thermal treatment is a thermal treatment method for some treatments. No matter which thermal treatment method is used, it is very important for the screw itself. Different heat treatment methods are used for different hardness. Even with the same heat treatment method, the hardness is different, and the selected scale and degree standard are different.
Thermal treatment of screws:
1. Red hot treatment: Red hot treatment is mainly performed by induction heating or flame heating. You can use two hardness testers to check the hardness of the screw, and then choose which standard thermal treatment to use. The two hardness testers are Vickers. Hardness tester and Rockwell tester. In addition to the hardness, it can also be selected from the thickness of the surface heat treatment. For processing or many units that use surface heat treatment of workpieces, the Vickers hardness tester is selected. When the surface heat treatment hardened layer is thick, Rockwell can also be used. Hardness Tester. Different reheating treatment standards can be interchanged, because its conversion value is recognized worldwide. After selecting a hardness tester, you should choose different scales, which are HRA scale and HRC scale.
2. Chemical thermal treatment: Another thermal treatment method for screws is chemical thermal treatment, which mainly makes the surface of the workpiece enter one or more kinds of chemical element atoms, and then changes the chemical composition, organization and function of the surface of the workpiece. What effect can be achieved after such chemical treatment? After quenching and low temperature tempering, chemical heat treatment can make the surface of the workpiece have high hardness, wear resistance and contact fatigue strength, and the core of the workpiece has high strong resistance.