焊缝为镍基合金的管线钢焊接接头应力腐蚀性能
SSCC properties of welded joints to weld nickel-based alloy
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摘要: 用镍基合金Arc625焊材，采用钨极惰性气体保护焊(tungsten inert gas welding, TIG)方法焊接X65管线钢. 针对该类焊接接头，通过显微组织观察、电化学测试、氢渗透试验、四点弯曲以及能谱分析研究其H2S应力腐蚀开裂(sulfide stress corrosion cracking, SSCC)行为. 结果表明，该类焊接接头熔合线处有硬脆碳化物聚集，焊缝与热影响区间电化学腐蚀性能差异较大，焊缝的自腐蚀电流密度比热影响区小一个数量级，该类焊接接头整体抗氢渗透能力较强，SSCC试验后试样在熔合线处出现了裂纹，该裂纹由阳极溶解和氢渗透的双重作用所致. 熔合线处 C元素的聚集和Ni，Cr元素的偏析对焊接接头SSCC性能影响较大.Abstract: 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 selfcorrosion 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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[1] 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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