Hardness can do 61 — 65hrc maturation process is: annealing, softening after casting machining, machining of air cooling after quenching and low temperature stresstempering.
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。
2
According to the tempering temperature and hardness curve, the redistribution of residual stress is associated with the transformation of residual austenite.
由回火温度与硬度变化曲线证实，残余应力重新分布是与残余奥氏体转变相关联。
3
You cannot know yourself fully without challenge, stress, distress, and unusual circumstances tempering the good times.