Tool steel is generally purchased in the annealed condition. Sometimes it is necessary to rework a tool that has been hardened, and the tool must then be annealed. For.
退火。退火工艺的组成为把钢加热到一定温度并保持一段时间，通常再缓慢冷却。退火是为了产生均匀化从而建立起有一致的特有性质的标准均匀化组织。
Chromium nickel stainless steel is usually non - magnetic in the annealed state, some of which are magnetic after cold working.
铬镍不锈钢在退火状况下通常是无磁性的，在冷加工之后，有的会有磁性的。
Why shall harden steel be annealed ?
淬火钢为什么要退火呢?。
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