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近年来,许多单位采用气体碳氮共渗、气体软氮化等多种化学热处理工艺,或者采用碳化硅等进行液体渗碳。在钢锉制造行业中,大多数液体碳氮共渗盐浴仍然采用氰化钠、黄血盐等作保护剂,主要是因为锉刀、手用锯条等经热处理后、不再进行磨削加工,对防止脱碳、氧化要求比较严格,用常用的脱氧剂(如,二氧化钛、二氧化硅、矽钙铁、硼砂等)不够理想,炉前用 HRC55～58的
In recent years, many units adopt many kinds of chemical heat treatment processes such as gas carbonitriding, gas soft nitriding, or liquid carburizing with silicon carbide or the like. In the steel file manufacturing industry, most liquid carbonitrided salt baths still use sodium cyanide, yellow blood salt and other protective agents, mainly because the file, hand saw blades and other heat treatment, no longer grinding, To prevent decarburization, oxidation more stringent requirements, with commonly used deoxidizer (such as titanium dioxide, silicon dioxide, silicon calcium iron, borax, etc.) is not ideal, before the furnace with HRC55 ~ 58