Abstract: The research of laser transformation hardening on steel 980 has been done in this paper. The width, depth and microhardness of quench zone was measured.

摘要：对980钢进行激光相变硬化研究，分别对其空冷和水冷时淬火硬化层的宽度和深度进行测量，对其组织和硬化层硬度进行分析。

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One of the greatest contributors to non-uniform hardness, increased thermal stresses, cracking and distortion is non-uniform fluid flow throughout the quench zone in production quench tanks.

造成淬火后工件硬度不均匀、热应力增加、畸变和开裂，主要是因为淬火槽内整个淬火区的液流不均匀。

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To quench 20 steel in critical zone under different intensity alternation magnetic field and to observe the microstructure after phase transformation.

对20钢进行不同强度交流磁场下的临界区淬火处理，观察相变后的组织。

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