Mn / N比对22%Cr节Ni型双相不锈钢多道次焊接热影响区组织和力学性能的影响

郭孟雨, 杨银辉, 高梓豪, 曹建春, 吴诗裕, 陈晓雨

Effect of Mn / N Ratio on the Microstructure and Mechanical Properties of Multi-Pass Welding HAZ of 22%Cr Low Nickel Type Duplex Stainless Steel

GUO Mengyu, YANG Yinhui, GAO Zihao, CAO Jianchun, WU Shiyu, CHEN Xiaoyu

表1 双相不锈钢试样的化学成分及Mn / N比

Table 1 Chemical compositions and Mn / N ratios of duplex stainless steel (DSS) samples

Steel No. Mass fraction / % Mn / N ratio C Si Mn S P Cr Ni Mo Cu N Fe DSS1 0.013 0.16 0.52 0.009 0.006 22.39 5.51 2.64 0.14 0.17 Bal. 3.06 (2205 steel) DSS2 0.004 0.20 1.96 0.004 0.007 22.06 1.32 2.72 0.11 0.52 Bal. 3.77 DSS3 0.011 0.11 8.01 0.009 0.007 22.52 1.37 2.69 0.14 0.47 Bal. 17.80 DSS4 0.011 0.11 14.51 0.006 0.005 22.49 1.34 2.70 0.14 0.22 Bal. 65.91