钡盐蒸发器1Cr18Ni9Ti列管失效分析  

Analysis of Failure of 1Cr18Ni9Ti Tubes of Barium Salt Evaporator

作　　者：魏云[1] 郑文龙[1] 

机构地区：[1]上海材料研究所,上海市200437

出　　处：《石油化工腐蚀与防护》2000年第4期34-36,40,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：通过宏观和微观观察与分析 ,对制钡盐蒸发器的 1Cr18Ni9Ti奥氏体不锈钢列管开裂原因进行了讨论。认为列管开裂起源于内壁的点蚀坑 ,裂纹的扩展方式为腐蚀疲劳和应力腐蚀开裂。指出消除加工过程的残余应力可防止SCC的发生 ,同时可选用双相钢 ,Cr5Mo、ND钢或 0 8Cr2AlMo做为列管材料。By the macro and micro observation and analysis, 1Cr18Ni9Ti austenic stainless steel tubes of barium salt evaporator were discussed. It was concluded from the analysis that the tube cracking originated from corrosion pitting and cracks developing in the form of corrosion fatigue and stress corrosion cracking (SCC). The elimination of residue stress during processing could prevent SCC and the duplex steel, Cr5MoND steel and 08Cr2AlMo steel could be selected for the tube materials.

关 键 词：1CR18NI9TI 点蚀 腐蚀疲劳 钡盐 蒸发器 列管失效 裂缝 应力腐蚀 

分 类 号：TQ050.9[化学工程]