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本刊1984年第二期发表了潘建国同志的“齿轮液体碳氮共渗亚温淬火”一文,用尿素取代氰化钠盐浴,虽然仍存在有毒的氰根,并未彻底解决剧毒污染问题,但原材料费用有所降低。目前,国内一些仍在使用氰盐浴单位,若采用尿素则是一种代用方法。最近我们收到伟江汪同志对使用尿素盐浴的看法,也收到张先立同志反映在使用尿素盐浴进行碳氮共渗实践中所得出的否定结论,这些都应该予以重视。我们认为,应尽量不用剧毒氰盐的化学热处理工艺,提倡用气体碳氦共渗或氮碳共渗等是有发展前途的工艺。当然,也应发展无毒盐浴,以及有毒盐浴的废渣废水的有效处理,希望目前正在解决使用氰盐问题的有关同志,提出你们的意见和经验,以深入讨论并共同推动这项改革工作。
In 1984 the second issue of Comrade Pan Jianguo published “gear liquid carbonitriding sub-temperature quenching ” article, with urea instead of sodium cyanide salt bath, although there is still toxic cyanide, did not completely solve the drama Poisonous pollution, but raw material costs have been reduced. At present, some domestic units are still using cyanide bath units, if urea is a substitute method. Recently, we have received Comrade Wang Wei’s views on the use of urea salt baths and the negative conclusion that Comrade Zhang Xianli has reflected in the practice of carbonitriding using urea salt baths. All these deserve our attention. In our opinion, we should try our best not to use the chemical heat treatment process of poisonous cyanide salts, and to promote the development of a promising process using gas-carbon-helium infiltration or nitrocarburizing. Of course, non-toxic salt baths should also be developed as well as effective treatment of waste and effluent from poisonous salt baths. We hope that relevant comrades on the issue of cyanide salt are currently being solved and put forward your opinions and experiences for deepening discussion and jointly promoting this reform. .