X70管線鋼及焊縫在模擬煤制氣含氫環境下的氫脆敏感性

關鴻鵬; 林振嫻; 李瑜仙; 劉青; 邢云穎; 王晶; 王修云

doi:10.13374/j.issn2095-9389.2017.04.008

X70管線鋼及焊縫在模擬煤制氣含氫環境下的氫脆敏感性

doi: 10.13374/j.issn2095-9389.2017.04.008

1) 北京市燃氣集團有限公司運營調度中心, 北京 100035
2) 安科工程技術研究院(北京) 有限公司, 北京 100083

詳細信息

中圖分類號: TG172.3;TE832
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出版歷程
- 收稿日期: 2016-07-22

Hydrogen embrittlement susceptibility of the X70 pipeline steel substrate and weld in simulated coal gas containing hydrogen environment

1) Production Operations, Beijing Gas Group Co., Ltd., Beijing 100035, China
2) Safetech Research Institute Ltd., Beijing 100083, China

摘要

摘要: 通過氫滲透測試、氫擴散模擬以及氫含量測試技術研究X70鋼在模擬4 MPa總壓,0.2 MPa氫氣分壓煤制氣環境下的充氫過程,并通過沖擊韌性測試、裂紋擴展測試以及缺口拉伸和慢應變速率拉伸測試方法,從不同角度分析X70鋼母材和焊縫組織在模擬煤制氣含氫環境下的力學性能.結果表明,在總壓4 MPa,0.2 MPa含氫煤制氣環境中,X70鋼表面存在吸附氫原子并能擴散進入X70鋼內部,達到穩態后內部的可擴散氫質量分數為1.9×10^-7;與空氣中的原始性能比較,X70鋼焊縫和母材的沖擊性能、缺口拉伸和慢應變速率拉伸強度、塑性以及材料的損傷容限均未發生下降;在實驗煤制氣環境中,X70鋼具有較低的氫脆風險.
- 管線鋼 /
- 鋼腐蝕 /
- 煤制氣 /
- 氫脆 /
- 敏感性
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 (4 MPa total pressure, 0.2 MPa 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.
- pipeline steel /
- steel corrosion /
- coal gas /
- hydrogen embrittlement /
- susceptibility

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參考文獻(15)

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