充氢条件下应力弛豫和恒载荷拉伸试验结果表明，氢有引起钢的软化和硬化的双重作用。
The experimental results of stress relaxation and constant load tests in hydrogen charging condition prove that hydrogen has dual action of softening and hardening steel.
按所采用的步骤，钢可以通过硬化来抵抗切削和磨损，也可以通过软化来允许机加工。
According to the procedure used, steel can be hardened to resist cutting action and abrasion, or it can be softened to permit machining.
本文介绍了高速钢快速软化退火的三种方法。这些方法具有节能、高效、周期短、成本低等特点。
This paper introduces three methods of rapid softening and annealing for high speed steel. There are many advancetages of energy-saving, short cycle and low cost.
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