Many large forgings with high requirements for mechanical properties and surface hardness need to be rough-machined after forging, and heat treated or surface quenched.

Quenching the surface of large forgings is prone to quenching cracks. Let's discuss the methods to prevent quenching cracks.

Methods to prevent quenching cracks

1. Use reasonable heat treatment specifications, control the heating rate and cooling process, and reduce heating defects and temperature stresses in forgings;

2. Avoid serious metallurgical defects and residual stresses in forgings;

3. Re-fire in time after extinguishing the fire.