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Cr5Mo钢管及其焊接接头长期服役后的组织性能与剩余寿命
引用本文:邵潭华,周丽霞,薛锦,顾文亚,李志俭,刘东宁.Cr5Mo钢管及其焊接接头长期服役后的组织性能与剩余寿命[J].焊接学报,1988(1):10-16.
作者姓名:邵潭华  周丽霞  薛锦  顾文亚  李志俭  刘东宁
作者单位:西安交通大学 副教授 (邵潭华,周丽霞,薛锦),西安交通大学 助理工程师 (顾文亚),湖南长岭炼油厂 工程师 (李志俭),湖南长岭炼油厂 助理工程师(刘东宁)
摘    要:本文研究了炼油厂铂重整装置临氢系统Cr5Mo耐热钢管及其焊接接头长期服役后的显微组织、力学性能和剩余寿命。试验结果表明,母材的组织和性能变化较小,估计还可继续使用10万小时。焊接热影响区的过热区已由马氏体转变为回火屈氏体,熔合线焊缝侧的类马氏体也已发生了回火,并在熔合线附近出现了增碳层。焊接接头的室温和高温瞬时强度高于母材,但其塑性韧性均较低,是裂纹萌生和扩展的薄弱部位,需加强运行监督。

关 键 词:焊缝  Cr5Mo钢//显微组织
收稿时间:1986/11/24 0:00:00

MICROSTRUCTURE, MECHANICAL PROPERTIES AND RESIDUAL LIFE OF Cr5Mo STEEL TUBING AND ITS WELD JOINT AFTER LONG-TERM SERVICE
Shao Tanhu,Zhou Lixi,Xue Jin,Gu Weny,Li Zhijian and Liu Dongning.MICROSTRUCTURE, MECHANICAL PROPERTIES AND RESIDUAL LIFE OF Cr5Mo STEEL TUBING AND ITS WELD JOINT AFTER LONG-TERM SERVICE[J].Transactions of The China Welding Institution,1988(1):10-16.
Authors:Shao Tanhu  Zhou Lixi  Xue Jin  Gu Weny  Li Zhijian and Liu Dongning
Affiliation:Xian Jiaotong University,Xian Jiaotong University,Xian Jiaotong University,Xian Jiaotong University,Hunan Changling Oil Refinery and Hunan Changling Oil Refinery
Abstract:The microstructure, mechanical properties and residual life of Cr5Mo heat resisting steel and its weld joint taken from Pt-hydrofomer vessel pipeline which had been in oil refinery service for 14 years were studied. The experimental results showed that:The change in the microstructure and properties of base metal is little, the residual life was estimated for 100,000 hours. The mirostructure of overheated zone in HAZ of weld oint had been transformed from martensite to tempered troostite, the martensitelike structure on the weld metal side in the viinity of fusion line had been tempered oo. and a arbon-enriched zone appeared nearby the fusion line. The room temperature strength and high temperature strengh of weld join were higher than those of base metal, but the ductility and toughness were lower. The weld joint was a weak site susceptible to rak initiation and propagation, Intendance must be intensified during the operational period.
Keywords:Weld  Cr5Mo Steel//Microstructurc  
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