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我厂原来一直采用氰化钠作渗碳剂,年耗量近三吨.在国家环保法颁布后,各有关部门对使用氰化钠这一剧毒物品加以限制,区环保办公室亦责令我厂整改.为此,我们根据上海热处理厂在外热式坩锅盐浴炉中用603作渗碳剂的经验。结合我厂内热式电极盐浴炉的条件,对设备性能和介质及603渗碳剂进行了分析,认为我厂使用603渗碳剂是可行的。603中起主导作用的木炭粉与氰化钠有本质上的差异,前者是以粉尘状存在于盐浴之中,后者是以熔融状态溶于氯化钡盐浴中.所以,炉温的均匀和盐浴的流动性是使用603的关键问题.在介质中,只有低熔点介质可得到良好的流动性。我厂是以氯化钠、氯化钾为介质基础,并控制好适当配比.内热式盐浴炉
I had been using sodium cyanide plant carburizing agent, the annual consumption of nearly three tons in the State Environmental Protection Act promulgated, the relevant departments of the use of sodium cyanide this highly toxic substances to be restricted, the District Environmental Protection Office also ordered my plant Rectification.To this end, we based on the Shanghai heat treatment plant in the external thermal crucible salt bath furnace with 603 for the experience of carburizing agent. Combining with the conditions of the thermal electrode salt bath furnace in our factory, the equipment performance and the medium and the 603 carburizing agent are analyzed, and it is feasible to use 603 carburizing agent in our factory. 603 in the leading role of charcoal powder and sodium cyanide are essentially different, the former is dust-like presence in the salt bath, the latter is dissolved in molten salt in the barium chloride salt bath. Therefore, the furnace temperature The homogeneity and salt bath fluidity are the key issues with the use of 603. In media, only low melting point media give good fluidity. I plant is based on sodium chloride, potassium chloride as the basis for the media, and control the right ratio. Internal thermal salt bath furnace