X100管线钢在恒载荷作用下的应力腐蚀开裂

中国腐蚀与防护学报

2011, Vol. 31

Issue (3): 184-189

研究报告

本期目录 | 过刊浏览

X100管线钢在恒载荷作用下的应力腐蚀开裂

郏义征，王俭秋,韩恩厚,柯伟

中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

STRESS CORROSION CRACKING BEHAVIOR OF X100 PIPELINE STEEL IN NS4 SOLUTION UNDER CONSTANT LOADING TEST

JIA Yizheng, WANG Jianqiu, HAN En-Hou, KE Wei

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(3353 KB)

摘要: 利用恒载荷试验机研究 X100 管线钢在 NS4溶液中恒载荷作用下的应力腐蚀开裂行为。结果表明，即使外加应力小于其屈服强度， X100管线钢也能发生应力腐蚀开裂，且为穿晶型的应力腐蚀开裂；裂纹萌生于贝氏体与铁素体相界之间、M/A岛与基体之间以及贝氏体板条之间的界面上。

关键词 ： X100管线钢, 恒载荷, NS4溶液, 应力腐蚀开裂

Abstract：Currently there is a demand to transport crude oil and gas by pipeline at a higher operating pressure in order to increase the capacity. For the investment reduction of long distance crude oil and natural gas pipeline project, the X100 grade ultrahigh strength pipeline steel will be adopted. Stress corrosion cracking (SCC) in pipeline is an important problem that threatens the safe operation of oil and gas transmission. Therefore, it is necessary to study SCC behavior of X100 pipeline steel in a standard near-neutral pH solution, NS4 solution. In this paper, constant loading tests of X100 pipeline steels were conducted at open circuit condition in deaerated NS4 solution. The results show that X100 pipeline steel under constant load in deareated NS4 solution exhibit transgranular stress corrosion cracking behavior. Even though the applied stress was less than the yield stress of X100 pipeline steel, stress corrosion cracking also occurred. It was found crack initiated at the interface of bainite phase and ferrite phase, M/A constituent and matrix, carbide and ferrite in bainite.

Key words： X100 pipeline steel constant load NS4 solution stress corrosion cracking

收稿日期: 2010-03-19

ZTFLH:

TG174

基金资助:

国家自然科学基金重大项目(5499336-9)资助

通讯作者: 王俭秋 E-mail: wangjianqiu@imr.ac.cn

作者简介: 郏义征，男，1980 年生，博士生，研究方向为材料的环境敏感断裂

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引用本文:

郏义征，王俭秋,韩恩厚,柯伟. X100管线钢在恒载荷作用下的应力腐蚀开裂[J]. 中国腐蚀与防护学报, 2011, 31(3): 184-189.
JIA Xi-Zheng, HAN En-Hou, KE Wei, YU Jian-Qiu. STRESS CORROSION CRACKING BEHAVIOR OF X100 PIPELINE STEEL IN NS4 SOLUTION UNDER CONSTANT LOADING TEST. J Chin Soc Corr Pro, 2011, 31(3): 184-189.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I3/184

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