裂解汽油加氢装置二段反应器缺陷分析  

DEFECT ANALYSIS OF THE 2^(ND) STAGE REACTOR OF GASOLINE HYDROGENATION

作　　者：赵福瑞[1] 尹国志[1] 牛岚岚 

机构地区：[1]中国石油吉林石化公司,吉林132022 [2]上海孚宝港务有限公司,上海201507

出　　处：《乙烯工业》2005年第3期32-36,共5页Ethylene Industry

摘　　要：对中国石油吉林石化公司300 kt/a乙烯装置汽油加氢二段反应器接管与筒体焊接接头的缺陷进行详细分析。阐明了缺陷的产生是由于在焊接过程中焊缝熔合区内形成马氏体、增碳层并伴有δ-铁素体的分解而使熔合区内及焊缝处的材质脆化。由于选用焊接材料的错误,产生较高的焊接残余应力致使焊缝开裂。分析了焊缝马氏体、增碳层及δ-铁素体分解的原因。Defects in the welded joints of connecting pipe and the body of the 2^(nd) stage reactor in the 300kt/ a ethylene plant of Jilin Petrochemical Company is ana- lyzed in detail.Causes of the defects are the formation of martensite and carburet layer and the decomposition ofδ-ferrite in weld metal zone in process of welding, which embrittles the materials in the weld metal zone. Since improper welding material is selected,the result- ing high welding residual stress results in the cracking of welding seam in turn.Reasons for the formation of martensite and carburet layer and the decomposition ofδ-ferrite are further discussed.

关 键 词：裂纹 焊接 马氏体 缺陷分析 反应器 加氢装置 裂解汽油 中国石油吉林石化公司 Δ-铁素体 焊缝开裂 

分 类 号：TE966[石油与天然气工程—石油机械设备]