R6401裂解汽油加氢二段反应器损伤和裂纹分析  

ANALYSIS OF DAMAGE AND CRACKING FOR R6401 PETROL HYDROGENATED REACTOR

作　　者：张清棠[1] 孙立巍[2] 兰景芳 

机构地区：[1]吉林化学工业公司,吉林市130000 [2]哈尔滨焊接研究所,150080 [3]大庆石油化工总厂,160000

出　　处：《焊接》1998年第7期16-20,共5页Welding & Joining

摘　　要：对某厂30万吨/年乙烯装置裂解汽油二段反应器锻焊接管(A182-F321)与筒体(A387Cr12C12+A240-321)相连角焊缝区裂纹的探伤、检验和分析得出,上述裂纹或位于角焊缝筒体侧熔合区(9例接管),或位于角焊缝金属中(4例接管),两种类型裂纹分别由角焊缝筒体侧熔合区焊缝一侧形成较宽的马氏体带和增碳带引起的脆化(500HV)及角焊缝金属中含量较高的δ铁素体转变成σ相引起的脆化(A_(?)为6-24J)所诱发。不适当的焊接材料和焊接工艺是造成接管角焊缝区两种形式材质脆化而引发两种性质裂纹的根本原因。Cracks in tube and cylinder fillet in fission petrol reactor for output of 300 thousand tons/year ethylene occur during inspection and are located in either fusion zone or weld metal. Two kinds of cracking are induced by wide martensite band and carbon - rich band or a phase, all above lead to brittleness of structure which is caused by unsuitable selection of welding consumables and technology.

关 键 词：马氏体带 σ相脆化 乙烯 反应器 焊接 焊接接头 

分 类 号：TQ221.211[化学工程—有机化工] TG441.7[金属学及工艺—焊接]