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本文简要分析本厂渗碳零件金相检验中存在的几个问题,并提出初步意见以改进零件的质量。本厂机床渗碳零件、自制工具和维修件的渗碳处理,主要在Ц-75型井式渗碳炉中进行。零件材料主要为15号、20Cr、18CrMnTi及20Mn2B钢等。渗碳介质采用煤油、工业用苯:近年来,曾一度使用过甲苯和二甲苯。渗碳温度一般为900～920℃,渗碳保温时间视零件的渗碳层深度要求而定,正常情况下,渗碳速度为O.15～0.20毫米/小时。机床磨擦片等薄件的装炉温度均在900℃以上,渗碳后,随炉
This paper briefly analyzes the metallurgical parts factory carburizing the existence of several problems, and put forward preliminary views to improve the quality of parts. Our factory carburizing parts, homemade tools and maintenance parts carburizing, mainly in Ц-75-type pit carburizing furnace. Parts of the material is mainly 15, 20Cr, 18CrMnTi and 20Mn2B steel. Carburizing medium using kerosene, industrial benzene: In recent years, once used toluene and xylene. Carburizing temperature is generally 900 ~ 920 ℃, carburizing holding time depending on the carburizing layer depth requirements of parts, under normal circumstances, the carburizing speed of O.15 ~ 0.20 mm / h. Friction plates and other thin pieces of machine loading temperature are above 900 ℃, carburizing, with the furnace