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前言在工业生产中,利用高频感应电流对钢件进行表面加热淬火已有五十多年的历史。目前,这项技术已成为普遍应用的表面强化手段。与其它表面加热不同,感应加热的特点是,直接在工件内产生热量,即内热式。在居里点以上,热透深度的增加是在表面缓慢升温过程中进行的,过热倾向小,与一般电炉加热相比,感应淬火得到的组织更细密,表面硬度较高,残余压应力分布较合理,弯曲疲劳强度和耐磨性较高,而且,还具有节能、快速和无污染等优点。有资料表明,到九十年代高频感应淬火应用将增加73%[3]。
Preface In industrial production, the use of high-frequency induction current on the surface of steel quenching has more than 50 years of history. At present, this technology has become a commonly used surface hardening method. Unlike other surface heating, induction heating is characterized by direct heat generated in the workpiece, that is, thermal. Above the Curie point, the increase of heat penetration depth is carried out during the slow heating of the surface, and the overheating tendency is small. Compared with the normal electric furnace heating, the structure obtained by induction hardening is more fine, the surface hardness is higher, and the residual compressive stress distribution is more Reasonable, bending fatigue strength and high wear resistance, but also has the advantages of energy saving, fast and pollution-free. Data show that by the 1990s high-frequency induction hardening applications will increase by 73% [3].