制氧压缩机组中间冷却器不锈钢封头的开裂分析  

Failure Analysis for the Cracking of Austenitic Stainless Steel Heads of Coolers in an Oxygen Compressor System

作　　者：杨镇[1] 杨成领[1] 

机构地区：[1]宝山钢铁股份有限公司能源部,上海200941

出　　处：《机械工程材料》2004年第9期45-48,共4页Materials For Mechanical Engineering

摘　　要：通过无损检测、常规力学性能试验以及金相分析等手段对制氧压缩机组中间冷却器不锈钢封头的开裂失效进行分析。分析结果表明:该失效属于304不锈钢的应力腐蚀开裂。由于1级冷却器管的开裂泄漏而造成的高温氧气+含氯离子冷却水介质环境,封头 筒体对接环焊缝区域的残余应力以及封头一侧热影响区中的晶界碳化物析出是诱发应力腐蚀开裂的三个主要因素。Failure analysis was performed for cracking of austenitic stainless steel heads of coolers in an oxygen compressor system. By means of NDT, tensile testing, hardness testing, metallographic examination and fractography, the failure mode was identified as stress corrosion cracking of the butt-welds in the heads. The combination of following three factors led to the cracking, i.e., corrosive environment contarning oxygon and chloride resulted from leakage of cooling tubes, residual stresses distributed around the butt-welds, and segregation of carbides at grain boundaies of HAZ

关 键 词：SUS304钢 封头 应力腐蚀开裂 失效分析 

分 类 号：TG142.71[一般工业技术—材料科学与工程]