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我厂生产红旗—100推土机履带销套,热处理曾采用渗炭后盐溶加热淬火工艺,效率低;后改为箱式电阻炉加热淬火工艺,因无保护气体,工件表面氧化脱碳严重,特别是内孔热处理后再加工,氧化脱碳严重影响了产品质量。1978年我厂试验采用中频感应穿透加热工艺,获得良好效果。经过一年多的实践验证,此工艺基本上使生产达到了质量稳定、成本低、生产效率高、劳动条件好的要求,对大批量生产有推广价值。本文就对此工艺作一简单介绍。
I plant production red flag -100 bulldozer track pin sets, heat treatment has been used after the infiltration of salt dissolved heating quenching process, low efficiency; later replaced by box-type resistance furnace heating quenching process, because of no protective gas, the workpiece surface oxidation decarburization serious, especially Is the heat treatment hole after processing, oxidation decarburization seriously affected the product quality. In 1978, our factory experimented with medium-frequency induction penetrating heating process and achieved good results. After more than a year of practical verification, this process basically enables the production to meet the requirements of stable quality, low cost, high production efficiency and good working conditions, and has the promotion value for mass production. This article on the process for a brief introduction.