工频感应加热装置在热处理工艺上,目前多用于冷轧辊、柱塞及轮类等圆柱形大件的表面淬火,以及筒状和环状大型焊接件的局部热处理。对于“V”型或“O”型等孔型的型钢矫正圈的表面淬火却应用得比较少。究其原因,主要是矫正圈的孔型深度较大,不利于表面感应加热淬火。过去,我厂采用的是整体加热淬火方法,工艺复杂、工人劳动强度大、能源、材料等消耗较高。型钢矫正圈在工作时承受很大的静载荷、交变载荷、接触疲劳和热冲击,因此,必须具有高的强度、疲劳抗力、耐磨性和抗 Frequency induction heating device in the heat treatment process, currently used for cold roll, plunger and wheel cylindrical surface of the large quenching, as well as the cylindrical and ring-shaped large parts of the local heat treatment. For the “V” type or “O” type of profiled steel correction ring surface hardening is applied less. The reason, the main hole is larger corrective ring depth, is not conducive to the surface induction heating quenching. In the past, our factory adopted the whole method of heating and quenching. The process is complex, the labor intensity of workers is high, and the consumption of energy and materials is high. Sectional ring steel in the work to bear a lot of static load, alternating load, contact fatigue and thermal shock, therefore, must have high strength, fatigue resistance, wear resistance and resistance