annealing softening 退火软化
To include the quenching and tempering intermediate softening annealing and finishing after.
要包括中间的软化退火和精加后的淬火及回火。
The most commonly used heat treatments on metals are softening annealing, quenching, normalizing, surface hardening treatment, precipitation hardening.
最常见的热处理包括软化退火、淬火、正火、表面强硬化、淀积硬化。
Hardness can do 61 — 65hrc maturation process is: annealing, softening after casting machining, machining of air cooling after quenching and low temperature stress tempering.
硬度能做到61——65hrc成熟工艺是：铸造后软化退火，便于加工，加工后空冷淬火加低温去应力回火。
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