试题与答案

将金属构件加热到高于或低于临界点,保持一定时间,随后缓慢冷却,从而获得接 * * 衡状态的

题型:单项选择题

题目:

将金属构件加热到高于或低于临界点,保持一定时间,随后缓慢冷却,从而获得接 * * 衡状态的组织与性能的金属热处理工艺。该定义表示()。

A、退火

B、正火

C、回火

D、淬火

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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