【摘要】 本文用钢箔称重法测量确定炉气氮势，用３８ＣｒＭｏＡｌＡ和４０ＣｒＮｉＭｏＡ钢的薄片进行饱和渗氮，根据金相组织中是否出现网状氮化物或白亮层组织，确定了两种钢在５１５℃气体渗氮时临界氮势均在０．３２％Ｎ～０．３９％Ｎ之是。更多还原

【Abstract】 In the paper, the weight gain method are used to measure nitrogen potential in ammonia atmosphere The critical nitrogen potential without net nitride or white layer in the micro section of 38CrMoAlA and 40CrNiMoA steel are between 032%N～039%N when the piece of steel are saturatly intrided at 515℃ in 15h更多还原