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我厂是机械部定点生产滚丝机的专业厂。蜗轮、蜗杆传动是各种规格滚丝机变速系统的关键件。蜗杆材料过去一直采用20Cr钢,经表面渗碳机油淬火,齿部硬度要求达到55HRC。但由于我厂没有专用渗碳设备,加之现场作业人员操作技术水平所限,淬火后蜗杆硬度指标一直不稳定,因硬度不足和硬度过高导致裂纹的现象时有发生,热处理批量废品问题一直没有解决。 从《机械工人》上看到《冷轧辊整体快速加热双液淬火工艺》一文后,很受启发。
I plant is the Ministry of Machinery sentinel production line of professional factory. Worm gear, worm drive is a variety of specifications Threading Machine transmission key components. Worm material has been used in the past 20Cr steel, hardened by surface carburizing oil, tooth hardness requirements to reach 55HRC. However, due to the fact that there is no special carburizing equipment in our factory and the operation skill level of the field workers is limited, the hardness index of the worm has not been stable after quenching. The problem of cracks caused by insufficient hardness and high hardness often occurs. solve. From the “mechanic” to see the “whole roll of rapid heating double-liquid quenching process,” a article, very inspired.