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钢淬火怎么变软

更新时间: 2020-10-25 00:00:00     

1、把淬过火的钢重新再放进热处理的炉子里,加热到500度,保温两个小时;

2、把淬火后的钢取出来放在空气中冷却到室温,钢的硬度一般应该在HB200到230;

3、若想把钢的硬度退到淬火前的硬度,就将炉温升到850度,随着炉冷却下来,钢的硬度便会下降。

关键词: 淬火 怎么

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