时间-温度-硬度曲线
time-temperature-hardness curve
高温硬度
hot hardness
high temperature hardness
High-temporture hardness
red hardness
高温硬度测试器
high-temperature microhardness tester
深氮化硬化32Cr3MoVE钢
32Cr3MoVE deep nitrided steel
梯度硬度模具
mould with gradient hardness
循环软化硬化
cyclic hardening and softening