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LI Jiexiang1,LI Yuntao1, HAN Yongdian2, ZHAO Yingxin1. SSCC properties of welded joints to weld nickel-based alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(8): 55-58. DOI: 10.12073/j.hjxb.20150917002
Citation: LI Jiexiang1,LI Yuntao1, HAN Yongdian2, ZHAO Yingxin1. SSCC properties of welded joints to weld nickel-based alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(8): 55-58. DOI: 10.12073/j.hjxb.20150917002
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SSCC properties of welded joints to weld nickel-based alloy

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  • Received Date: September 16, 2015
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  • X65 pipeline steel was welded by Tungsten Inert Gas Welding TIG using nickel base alloys (Arc625). For the welded joints, through the observation of microstructure, electrochemical test, hydrogen permeation test, four point bending and spectrum analysis of the H2S sulfide stress corrosion cracking (SSCC) behavior. The results showed that there were hard and brittle carbides in the fusion line. The electrochemical corrosion behavior of weld and HAZ was quite different, the selfcorrosion current density of welding seam is one order of magnitude smaller than that of HAZ. This kind of welded joint had strong hydrogen permeation resistance. After the SSCC test, the crack appeared at the fusion line, which was caused by the double effect of anodic dissolution and hydrogen permeation. The aggregation of C and the segregation of Ni and Cr at the fusion line had a great influence on the SSCC performance of the welded joint.
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  • 徐连勇, 荆洪阳, 曹 军, 等. 管线钢焊接接头H2S应力腐蚀试验分析[J]. 焊接学报, 2010, 31(1): 12-16 Xu Lianyong, Jing Hongyang, Cao Jun,etal. H2S stress corrosion invertigation of pipeline steel weldedjoints[J]. Transactions of the China Welding Institution, 2010, 31(1): 12-16.[2] 刘瑞瑞, 赵志龙, 艾昌辉, 等. 镍基高温合金K4169熔敷金属间化合物CrFeNb熔合区微观组织结构[J]. 焊接学报, 2015, 36 (2): 71-74. Liu Ruirui, Zhao Zhilong, Ai Changhui,etal. Microstructure of fusion zone deposited intermetallics CrFeNb on Nickel-base superalloy K4169[J]. Transactions of the China Welding Institution, 2015, 36 (2): 71-74.[3] Nation Association and Cross ion Engineer. NACE TM0177-2005, Laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in H2S environments[S]. America: NACE, 2005.[4] American Society for Testing and Materials. ASTM G 148-97(2003). Standard practice for evaluation of hydrogen uptake, permeation and transport in metals by an electrochemical technigue[S]. America: ASTM, 2003.[5] American Society for Testing and Materials. ASTMG39-1999(2011). Standard practice for preparation and use of bent-beam stress-corrosion test speciments[S]. America: ASTM, 2011.[6] 俞 峰, 许 达, 罗 迪. 高速钢中的碳化物缺陷[J]. 钢铁研究学报, 2008, 20 (6): 1-6. Yu Feng, Xu Da, Luo Di .Carbide defect in high speed steel[J]. Journal of Iron and Steel Research, 2008, 20(6): 1-6.[7] Huang F, Liu S, Liu J,etal. Sulfide stress cracking resistance of the weld WDL690D HSLA steel in H2S environment[J]. Material Science & Engineering A, 2014, 591: 159-166.[8] 左景伊. 应力腐蚀破裂[M]. 西安: 西安交通大学出版社, 1985.
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