所谓双气保护气就是以氨分解气为基础并通入一定比例的极少量石油液化气,两种气氛混合后,同时通入炉内,使加热炉内气氛不是单一的分压很高的还原性气氛H_2,而是既具有还原性又具有渗碳性的两重性气氛。在小型轴承的热处理实践中,证明双气 保护气具有一定的效果。双气保护气使用的设备简单,操作方便,可控制炭势。附图13幅。 The so-called double gas protection gas is based on ammonia decomposition gas and access to a certain percentage of a very small amount of liquefied petroleum gas, the two mixed atmosphere, at the same time into the furnace, the furnace atmosphere is not a single high partial pressure reduction H_2, but both reductive and carburizing dual atmosphere. In the small bearings in the heat treatment practice, to prove double gas protective gas has a certain effect. Double gas protection equipment used in gas is simple, easy to operate, can control the carbon potential. Figure 13 Figure.