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表面淬火主要是通过快速加热与立即淬火冷却相结合的方法来实现的,即利用快速加热使钢件表面很快地达到淬火温度,而不等热量传至中心,即迅速予以冷却,如此便可以只使表层硬化,而中心仍为未淬火组织,即原来塑性和韧性较好的退火、正火或调质状态的组织。表面淬火传统方法主要有感应加热表面淬火、火焰加热表面淬火、电接触加热表面淬火、电解液加热表面淬火等,各有能耗高、精确性不高、工件变形大等缺点。现在,电子束技术和激光技术逐步用于表面淬火中。电子束技术已有近40年的历史,这种技术对表面热
Surface quenching is achieved by a combination of rapid heating and immediate quench cooling, where the surface of the steel quickly reaches the quenching temperature by rapid heating, and the heat is rapidly cooled to the center, so that it can be cooled Only the surface hardening, and the center is still not quenched tissue, that is, the original good ductility and toughness of the annealed, normalized or tempered state of the organization. The traditional methods of surface hardening induction heating surface hardening, flame heating surface hardening, electrical contact surface heating quenching, electrolyte heating surface hardening, etc., each with high energy consumption, accuracy is not high, large deformation and other shortcomings. Now, electron beam technology and laser technology are gradually used in surface hardening. Electron beam technology has been nearly 40 years of history, this technology is hot on the surface