控制气氛渗碳中的几个问题

• 作 者: 高元坤
• 机 构: 北京航空学院
• 出 处: 兵器材料与力学
• 发表日期: 1984年04期
• 关键词: 渗碳层 碳势 控制气氛热处理 吸热式气氛 渗碳剂 发生炉 热程 保护气氛 滴注式渗碳 渗碳工艺

控制气氛热处理就是把要进行热处理的零件放到给定成分的气氛中进行加热,在加过热程中要淬火的零件则需保持该零件表面合碳量维持不变;而要渗碳的零件经过一定时间渗碳后,渗碳层达到一定深度,零件表面达到所要求的含碳量。因此,给定成分的炉气必然与某个碳势相对应。当我们要求的碳势改变时,气氛的组成也需做相应的改变。为了做到这一点,发生炉吸热式气氛在保持载气不变的情况下,用控制通入炉内的

Controlled atmosphere heat treatment is to put the parts to be heat treated in the atmosphere of a given composition to heat the parts to be quenched in the overheating process to maintain the carbon content of the surface of the parts remain unchanged; After a certain period of carburizing, the carburized layer reaches a certain depth, and the surface of the part reaches the required carbon content. Therefore, the furnace gas for a given composition necessarily corresponds to a certain carbon potential. When the carbon potential we request changes, the composition of the atmosphere needs to be changed accordingly. In order to do this, the furnace heat-absorbing atmosphere with the carrier gas unchanged in the case, with control into the furnace