论文部分内容阅读
我厂生产的165F、295柴油机及井岗山牌汽车齿轮曲轴,均用QT60-2制造,为提高耐磨性和疲劳强度,采用正火及中频感应加热淬火进行表面强化。在中频感应加热时,由于球铁的导热性差、淬透性好,为防止淬火裂纹,一般多采用油冷或用冷却能力介于油水之间的乳化液冷却,这既不经济,操作条件也较差。我厂采用喷雾正火预先热处理,然后用100kW800Hz可控硅中频加热进行喷水淬火。采用正火预先热处理,是为了获得成分
The 165F, 295 diesel engines and the Jinggangshan automobile gear crankshaft produced by our factory are all made of QT60-2. In order to improve the abrasion resistance and fatigue strength, the surface is strengthened by normalizing and medium frequency induction heating quenching. Induction heating in the IF, the ductile iron due to poor thermal conductivity, good hardenability, in order to prevent quenching cracks, the general use of oil-cooling or cooling capacity between oil and water between the emulsion cooling, which is neither economical nor operating conditions Poor. I plant spray normalizing heat treatment in advance, and then with 100kW800Hz SCR intermediate frequency heating water quenching. Pre-heat treatment using normalizing is to obtain the composition