temper hardening

Three. They are hardening, temper and anneal.

三种. 它们是淬火 、 回火和退火.

Three: they are hardening, temper and anneal.

三个过程: 它们是淬火 、 回火和退火.

For example , heat hardening, anneal, temper and so on.

有淬火 、 退火 、 回火各种热处理设备.

The results show that the microstructure transforms from temper martensite to temper troostite when the temper temperature is from 300 ℃ to 630 ℃, and the peak of secondary hardening appears at about 520 ℃.

结果表明：H13钢在300℃～630℃温度范围内回火，显微组织经历了由回火马氏体组织向回火托氏体组织的转变过程，在520℃左右出现二次硬化峰。