Four methods to interpret the quality of very high cold heading steel

1. Strictly control the chemical composition of steel according to the standard of cold heading steel, optimize the material structure, improve the plasticity of the material, ensure the stability of the steel performance, reduce the damage of inclusions to the performance, and reduce the content of harmful elements in the steel.

2. Through the control of the smelting and rolling process, reduce the amount of reduction, the number of rolling passes and the number of turns to obtain a uniform and refined grain structure, and avoid wrinkles and ears during the production process Folding improves the comprehensive mechanical properties of cold heading steel.

3. Choose appropriate rolls and a uniformly deformed pass system to ensure a smooth surface of the product, reduce cracks in the finished product, improve the quality of production spare parts, and ensure process requirements.

4. Strictly control heating temperature, time and furnace atmosphere, maintain positive pressure operation, and reduce surface burnout and surface decarburization.