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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Tensile Deformation on Microstructure and Pitting Resistance of BFS600 Austenitic High-strength Stainless Steel
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Effect of Tensile Deformation on Microstructure and Pitting Resistance of BFS600 Austenitic High-strength Stainless Steel

机译：拉伸变形对BFS600奥氏体高强度不锈钢组织和抗点蚀性的影响

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摘要

BFS600 austenitic stainless steel is a newly developed Cr-Mn-Ni-N high-strength stainless steel thataims to be used in the automotive industries. The effects of tensile deformation on the microstructureevolution and pitting behaviors of the BFS600 stainless steels were investigated in this paper. Themicrostructure and magnetic properties of the tensile-deformed BFS600 stainless steels were evaluatedusing optical microscopy, x-ray diffraction, scanning electron microscopy, electron backscatterdiffraction, the measurement of saturation magnetization and the ferrite meter. It was revealed that theα′-martensite phase had appeared in the steel after the tensile deformation. No ?-martensite phase wasidentified in this work. The amount of the α′-martensite phase increased as the tensile strain increased.Tensile deformation also resulted in the increase of dislocation density and grain refinement of theBFS600 stainless steel. For the deformed BFS600 austenitic stainless steels, the pitting resistance inNaCl solution decreased first and then increased as the tensile strain increased from 0 to 50%. The worstpitting resistance was present for the sample with a tensile strain of 30%. The dependence of pittingresistance on the tensile strain can be attributed to the combination effects of the increased dislocationdensity, the transformation of γ phase to α′-martensite phase, and the grain refinement after the tensiledeformation.
机译：BFS600奥氏体不锈钢是一种新开发的Cr-Mn-Ni-N高强度不锈钢，旨在用于汽车工业。本文研究了拉伸变形对BFS600不锈钢组织演变和点蚀行为的影响。使用光学显微镜，X射线衍射，扫描电子显微镜，电子反向散射衍射，饱和磁化强度测量和铁氧体仪对拉伸变形的BFS600不锈钢的显微组织和磁性进行了评估。结果表明，拉伸变形后钢中出现了α'马氏体相。在这项工作中没有发现β-马氏体相。随着拉伸应变的增加，α'-马氏体相的数量增加。拉伸变形还导致BFS600不锈钢的位错密度增加和晶粒细化。对于变形的BFS600奥氏体不锈钢，NaCl溶液中的耐点蚀性先降低，然后随着拉伸应变从0％增至50％而增加。拉伸应变为30％的样品存在最差的耐点蚀性。耐点蚀性对拉伸应变的依赖性可以归因于位错密度增加，γ相转变为α'-马氏体相以及拉伸变形后晶粒细化的组合效应。

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