Dispersion hardening是什么意思

用法例句

It was more strength and more wearable after by new heat treatment process of two times tempering and dispersion hardening than original one time tempering method for hot extruding die steel 4Cr5MoSiV1.

4Cr5MoSiVl钢制热挤压铝模具两次回火、弥散硬化的热处理工艺,比旧的一次回火工艺,具有韧性好,耐磨性好的优点。