工程科学学报2017，Vol.39Issue(4)：535-541,7.DOI:10.13374/j.issn2095-9389.2017.04.008
X70管线钢及焊缝在模拟煤制气含氢环境下的氢脆敏感性
Hydrogen embrittlement susceptibility of the X70 pipeline steel substrate and weld in simulated coal gas containing hydrogen environment
关鸿鹏 1林振娴 1李瑜仙 1刘青 1邢云颖 2王晶 2王修云2
作者信息
- 1. 北京市燃气集团有限公司运营调度中心,北京 100035
- 2. 安科工程技术研究院(北京)有限公司,北京 100083
- 折叠
摘要
Abstract
The diffusion and accumulation behaviour of hydrogen in X70 pipeline steel were investigated via hydrogen permeation test,hydrogen diffusion simulation,and hydrogen content test technology in a simulated coal gas environment(4MPa total pressure,0.2MPa hydrogen partial pressure).The mechanical properties of the X70 pipeline steel substrate and weld in a simulated coal gas environment were also analyzed through impact toughness test,crack propagation test,notch tensile test,and slow strain rate tensile test.Experimental results show that hydrogen absorbed on the X70 steel surface in a simulated coal gas environment spreads into the inside of the X70 steel,and the internal diffusion hydrogen mass fraction is 1.9×10-7 after reaching a steady state.Compared with the original performance in air,there is no decline in the impact performance,notched tensile and slow strain rate tensile strength,plasticity,and damage tolerance of the X70 pipeline steel substrate and weld in simulated coal gas.Results show that in a coal gas environment,X70 steel has a lower risk of hydrogen embrittlement.关键词
管线钢/钢腐蚀/煤制气/氢脆/敏感性Key words
pipeline steel/steel corrosion/coal gas/hydrogen embrittlement/susceptibility分类
矿业与冶金引用本文复制引用
关鸿鹏,林振娴,李瑜仙,刘青,邢云颖,王晶,王修云..X70管线钢及焊缝在模拟煤制气含氢环境下的氢脆敏感性[J].工程科学学报,2017,39(4):535-541,7.
