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几年来,在‘标准机床’工厂里应用盐浴槽进行螺钉、螺帽和其他零件的热处理,螺钉和螺帽用10号和15号低碳钢制造。经顶锻随后滚外螺纹和切削内螺纹制成。对这些零件的硬度和耐磨性要求较高,因此在机械加工后要经受渗碳和淬火,最后经氧化处理。由于有螺纹,就不仅必须规定其渗碳层深度,还要规定其渗碳层的饱和度。当渗碳层中的含碳量高于0.9%时就不可避
For several years, salt baths have been used in the ’standard machine tool’ plant for the heat treatment of screws, nuts and other parts made of mild steel Nos. 10 and 15. Top forging then roll outside the thread and cutting thread made. The hardness and wear resistance of these parts require higher, so after machining to withstand carburizing and quenching, and finally by oxidation. Due to the thread, it is necessary not only to stipulate the depth of its carburized layer, but also to specify the saturation of its carburized layer. When the carbon content in the carburizing layer is higher than 0.9%, it is inevitable