A new method improving intergranular corrosion resistance of AISI 304 stainless steel: deep cryogenic treatment

摘要：

The present remedies used to reduce sensitization in austenitic stainless steels have certain advantages and disadvantages,such as reducing C content,addition of Ti element or niobium plus tantalum,postweld heat treatment and grain boundary engineering (GBE) etc. In this study,a new method improving intergranular corrosion resistance of AISI 304 stainless steel by deep cryogenic treatment has been developed. Martensite transformation,plastic deformation and grain refinement during deep cryogenic treatment and the subsequent sensitization treatment,which provide more carbides precipitate sites and change the character of original austenitic grain boundary network by twin nucleation and growth. Deep cryogenic treatment should be carried out before the exposure to elevated temperature in order to gain better intergranular corrosion resistance. Deep cryogenic treatment is a very effective and practical method,which can be used for special conditions,such as pre-strain forbidden components,very thick wall components and welded components etc.

关键词： Intergranular corrosion Austenitic stainless steel Deep cryogenic treatment Microstrure

作者: Qiong-Qi Wang Wei-Ze Wang Fu-Zhen Xuan Shan-Tung Tu

作者单位: MOE Key Lab.of Safety Science of Pressurized System,East China University of Science and Technology,Shanghai 200237,China

会议类型: 国际会议

会议名称: Fracture Mechanics and Applications 2008(国际断裂力学2008年年会)(FM2008)

会议地点: 杭州

会议语种:英文

页码: 411-416

在线出版日期: 2008-10-31（万方平台首次上网日期，不代表论文的发表时间）