【摘要】 通过断口分析 ,扫描电镜观察 ,服役前后试样的透射电镜比较和残余奥氏体测定 ,对经复合强韧化处理的 9SiCr制钉模进行了失效分析。结果表明 :断裂失效属回火脆 ,服役时应力诱发残余奥氏体AR转变为M加剧了这种脆性。更多还原

【Abstract】 The failue analysis of 9SiCr Steel which has been treated with composite for strengthening and toughtening was studied by means of TEM and SEM.The result shows that the brittle fracture belongs to tempered brittleness and would be deteriorated due to remained austenite changed into martensite.更多还原