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在机械制造中,用来制造承受各种复合应力的零件,如轴类、连杆、螺栓、齿轮等,往往采用调质用的优质碳素钢,进行调质(淬火和高温回火)综合热处理,以便得到适当的高强度和高韧性。例如,用量很大的45~#优质碳素钢,为了获得较好的综合机械性能,绝大部分均采用轧制或热锻——粗加工——调质——精加工工艺。其中,调质处理工艺一般为加温到820～840℃,保温90min,水冷、淬火后的回火温度为570～590℃,保温120min,空冷。据初步归算,重1kg的零件,调质需消耗1kwh电。
In machinery manufacturing, used to manufacture a variety of composite components to withstand stress, such as shafts, connecting rods, bolts, gears, etc., often with the use of quality carbon steel for tempering (quenching and tempering) synthesis Heat treatment in order to obtain the appropriate high strength and high toughness. For example, a large amount of 45 ~ # quality carbon steel, in order to obtain better overall mechanical properties, the vast majority are used for rolling or hot forging - roughing - quenching - finishing process. Among them, the quenching and tempering process is generally heated to 820 ~ 840 ℃, holding 90min, water cooling, tempering temperature after quenching 570 ~ 590 ℃, holding 120min, air cooling. According to the preliminary calculation, weight 1kg parts, conditioning need to consume 1kwh electricity.