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我厂生产的梅花牌自行车中轴棍(A 型中轴),在工作中主要承受弯曲、扭转力的作用,要求具有足够的强度和刚度。中轴棍原采用低碳钢(A3或 B3F)渗碳淬火,生产效率低,劳动强度大,生产成本高,质量不稳定。为此,我们采用了高温加热强烈淬火获得低碳马氏体以代替原渗碳淬火工艺,其结果是简化工艺,成本低,质量稳定,生产效率提高1.5倍,节省电力消耗40%。现将情况简介如下。1.试验依据根据马氏体形态学的资料报道,只有当含碳量低于0.6%时方可形成低碳马氏体。而
I plant the Plum brand Bicycle Axle (A-type axis), the main job in the bending, torsional force, requires adequate strength and stiffness. The original low-carbon steel shaft (A3 or B3F) carburizing quenching, low production efficiency, labor-intensive, high production costs, the quality of instability. For this reason, we adopt a high-temperature heating and strong quenching to obtain low-carbon martensite instead of the original carburizing and quenching process. As a result, the process is simplified, the cost is low, the quality is stable, the production efficiency is increased by 1.5 times, and the electricity consumption is saved by 40%. Now the situation is as follows. 1. Test basis According to the martensite morphological data reported, only when the carbon content is less than 0.6% before forming low-carbon martensite. and