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固体渗碳是机械制造业中一门热处理技术。曲轴、齿轮等零件的传动摩擦,不但表面要求光滑,而且还要一定的硬度,这样运转寿命就长。通常20号碳素钢经机械加工后,就可达到一定的表面光洁度,但硬度还相差很远。所以一些机械零件,必须经过热处理才能达到表面硬度HRC45—55以上。我县自行车零件厂,在制造自行车刹车卡盘零件中,用20号碳素钢制造偏心轴等,产品设计要求硬度HRC55—64。该厂开始选用石墨作渗碳剂,但零件合格率十分低,次品多。改变渗碳剂配比和不同操作条件,渗碳又不稳定,因此这些热处理工序成为生
Solid carburizing is a heat treatment technology in the machinery manufacturing industry. Crankshaft, gear and other parts of the transmission friction, not only the surface requirements of smooth, but also a certain degree of hardness, so long running life. Usually 20 carbon steel by mechanical processing, you can reach a certain degree of surface finish, but the hardness is still a long way from. So some mechanical parts, must be heat treated to reach the surface hardness HRC45-55 above. I County Bicycle Parts Factory, in the manufacture of bicycle brake chuck parts, with 20 carbon steel eccentric shaft manufacturing, product design requirements hardness HRC55-64. The plant began to use graphite as a carburizing agent, but the parts pass rate is very low, defective products. Change the ratio of carburizing agent and different operating conditions, carburizing is not stable, so these heat treatment process into a raw