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由于感应加热设备的频率不同,零件所要求硬化层深度不同,在奥氏体化温度下的加热速度、加热温度和保持时间,对零件的质量和能源的节约有着很大的影响。例如,冷轧辊的工频感应加热淬火,如果把奥氏体化温度由880℃提高到930℃,就使淬火后的隐晶马氏体变为针状、粗针状马氏体,使残留奥氏体增加,表面硬度降低。φ500mm的轧辊,每延长一分钟不必要的保持时间,不仅产生上述质量问题,还将多消耗10kW左右的电能。根据快速加热概念,可以把感应加热区分为快速加热和非快速加热,据此
Due to the different frequency of induction heating equipment, parts require different hardened depths, the heating rate, heating temperature and holding time at austenitizing temperature have a great influence on the quality of parts and the energy saving. For example, the cold-roll induction heating and quenching, if the austenitizing temperature from 880 ℃ to 930 ℃, the quenched cryptocrystalline martensite into acicular, coarse needle-like martensite, the residual Increased austenite, reduced surface hardness. φ500mm roll, every extension of one minute of unnecessary retention time, not only have the quality problems, but also will consume more about 10kW of electrical energy. According to the concept of rapid heating, induction heating can be divided into rapid heating and non-rapid heating, according to which