拉伸变形对高氮奥氏体不锈钢显微组织和耐腐蚀性能的影响

郑椿, 刘嘉斌, 江来珠, 杨成, 姜美雪

Effect of Tensile Deformation on Microstructure and Corrosion Resistance of High Nitrogen Austenitic Stainless Steels

ZHENG Chun, LIU Jiabin, JIANG Laizhu, YANG Cheng, JIANG Meixue

表3 QN1803和304不锈钢不同拉伸形变下的耐腐蚀性能对比

Table 3 Comparisons of corrosion resistance between QN1803 and 304 stainless steels under different tensile states

Steel State Eb ia ir Ra Corrosion rate / (g·m-2·h-1) mV mA·cm-2 mA·cm-2 % In 10%HNO3 + 3%HF In 10%H2SO4 QN1803 As-annealed 351 540 2.9 0.53 624.6 2.26 10% tensile strain 341 573 1.3 0.23 617.9 2.56 20% tensile strain 310 630 3.2 0.50 616.3 2.54 As-fractured 313 549 1.8 0.33 625.5 2.64 304 As-annealed 336 1031 18.7 1.81 335.7 17.86 10% tensile strain 330 1076 16.9 1.57 345.7 18.80 20% tensile strain 289 1021 18.5 1.81 345.8 20.59 As-fractured 282 894 13.6 1.52 348.6 22.15