How to improve the quality of die steel

1. In order to improve the mechanical properties of die steel, the modification of inclusions by Ca, re and other trace elements is used to change the structural morphology and physical properties of inclusions in die steel, and to spheroidize and refine inclusions in die steel.

2. The high temperature diffusion heat treatment of the ingot of the die steel can improve the composition inhomogeneity of the ingot in the die steel, so as to improve the transverse performance of the steel.

3. In hot working, repeated upsetting and multidirectional rolling of ingots of die steel can reduce the level of carbide segregation in die steel and improve the anisotropy of steel.

4. The purity of steel has a great influence on the isotropic properties of die steel. The secondary refining technology (including vacuum refining, ESR and ladle powder spraying) can improve the purity of steel, especially reduce the content of harmful impurities in die steel, which is very beneficial to improve the properties of die steel.