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过去我厂拉刀热处理操作规程是:850～900℃C预热→1260～1280℃最后加热→淬入油中冷至闪火点→趁热矫直等等(详见《机床与工具》1954年第20期《拉刀热处理经验》一文)。 现经热处理车间的工人和技术员研究后,改采用下面的操作规程:850～900℃预热→1260～1280℃最后加热→淬入
In the past I plant broaching heat treatment procedures are: 850 ~ 900 ℃ C preheating → 1260 ~ 1280 ℃ the final heating → quenching oil to flash point → hot straightening, etc. (see “Machine and Tools” 1954 Year 20 “broaching heat treatment experience” article). Now after the heat treatment workshop workers and technicians to study, use the following operating procedures changed: 850 ~ 900 ℃ preheating → 1260 ~ 1280 ℃ final heating → quenching