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我厂是生产12型拖拉机齿轮和轴的专业厂,所有零件都得热处理,热处理车间耗电占全厂容量的75%以上。在当前能源短缺的情况下,热处理车间的节能有着重要的意义。现将我厂在这方面的实践,介绍如下: 一、渗碳直接热油淬火 1.渗碳直接热油淬火工艺 12型拖拉机齿轮采用20CrMnTi钢,这是很适宜在渗碳后直接淬火的细晶粒钢。鉴于齿轮花键孔精度要求较高(花键孔底径φ28～φ48mm,允差在0.05mm内),如采用渗碳缓冷后,轮齿再高频淬火,既不能获得良好的机械性能,又耗费能源。我们根据渗碳钢淬火后,变形主要是热应力所引
I plant is the production of 12 professional tractor gear and shaft plant, all parts have to heat treatment, heat treatment plant power consumption accounts for more than 75% of the plant capacity. In the current energy shortage situation, the heat treatment plant energy saving is of great significance. Now I plant in this area, the practice described below: First, carburizing direct hot oil quenching 1 carburizing direct hot oil quenching process 12 tractor gear 20CrMnTi steel, which is very suitable for direct quenching after carburizing fine Grain steel. In view of the high precision gear spline hole (spline hole bottom diameter φ28 ~ φ48mm, tolerance within 0.05mm), such as slow cooling after carburizing, tooth and then high-frequency quenching, neither to obtain good mechanical properties, Spend energy again. After we quenched according to carburizing steel, the deformation is mainly caused by thermal stress