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用高频电流进行机床导轨加热淬火已有较长历史。它与用电接触加热相比,可提高导轨的耐磨性,延长床身的使用寿命。但在应用过程中也暴露出一些缺点,如:频率高(200～300kHz)加热深度浅,在要求得到厚的淬硬层时(机械工业部规定为1.5～3mm),就必须延长加热时间,但这会加大内外温差,造成表面过热而内部加热不足,引起组织及其组织转变的不均匀性,从而增加
It has been a long history to heat harden a machine tool with a high-frequency current. Compared with electric contact heating, it can improve the wear resistance of the guide rail and prolong the service life of the bed. However, there are also some shortcomings exposed in the application process, such as: high frequency (200 ~ 300kHz) shallow heating depth, in the request of thick hardened layer (Ministry of Machinery Industry for the provisions of 1.5 ~ 3mm), it is necessary to extend the heating time, But this will increase the temperature difference between inside and outside, resulting in the surface overheating and lack of internal heating, causing tissue and organizational changes in the non-uniformity, thereby increasing