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钢件在气体渗碳过程中,影响渗层质量的除渗碳温度和保温时间外,煤油供给量也是一个主要因素。渗碳温度一定时。当煤油供量发生变化,这时,相应地炉内气氛、炉气压力及产品渗层金相组织也发生不同程度的变化。根据多年来的生产实践经验,可以通过观察废气(排气孔φ3毫米)燃烧火焰的火色及特点进行判断,及时排除不正常现象,对保证产品质量是有一定益处的。下面以20Cr2Ni4A钢制件在RJJ—
Steel gas carburizing process, affecting the quality of the permeable layer In addition to carburizing temperature and holding time, the supply of kerosene is also a major factor. Carburizing temperature is a certain time. When the supply of kerosene changes, at this time, correspondingly, furnace atmosphere, furnace gas pressure and product infiltrating microstructure also change in varying degrees. According to many years of practical experience in production, we can judge the fire color and characteristics of the combustion flame by detecting the flue gas (φ3 mm) and promptly eliminate abnormal phenomena, which is of certain benefit to the quality of the products. Below 20Cr2Ni4A steel parts in the RJJ-