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活塞销是汽车发动机中连接活塞与连杆的重要零件。我厂过去采用低碳合金钢外表面渗碳淬火处理,渗碳剂单纯使用煤油,造成碳黑严重、硬度不均、质量不稳。从去年起,我厂大胆采用复合渗碳剂,把单液渗碳改为多液渗碳、较好地解快了渗碳质量问题。现将具体作法介绍如下: 先将活塞销按批号、炉次分类装夹在专用工具上待渗碳。使用75千瓦井式气体炉进行加热、渗碳温度为910℃。当炉温升至800℃时,便可向炉内滴入甲醇(40滴/分)。炉温达到910℃时保温20～
The piston pin is an important part connecting the piston and connecting rod in the car engine. In the past, our factory adopted carburizing and quenching on the outer surface of low-carbon alloy steel, purely using kerosene for carburizing agent, resulting in severe carbon black, uneven hardness and unstable quality. Since last year, I plant bold use of composite carburizing agent, the single-liquid carburizing to multi-liquid carburizing, better solution to the problem of carburizing quality. Specific practices are introduced as follows: First, the piston pin by batch number, furnace classification folder on special tools to be carburized. Heated with a 75-kilowatt gas furnace at a carburizing temperature of 910 ° C. When the furnace temperature rose to 800 ℃, can be dropped into the furnace methanol (40 drops / min). Furnace temperature reaches 910 ℃ insulation 20 ~