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为了拓宽铁素体不锈钢的应用范围,利用金相显微镜、电子背散射衍射技术(EBSD)和透射电镜(TEM),研究含镍铁素体冷轧不锈带钢的微观组织结构,分析了其形成原因及对力学性能的影响。结果表明,由于镍等奥氏体形成元素带来的相变,细化了铁素体组织,且在一定的热处理工艺下可以得到具有较高应力、由铁素体亚晶和小晶粒组织构成的弥散组织,该组织均匀分布在铁素体基体上,起到了“第二相”强化的作用,从而在保证铁素体不锈钢较好塑性的同时,大大提高了其强度。
In order to broaden the application scope of ferritic stainless steel, the microstructure of cold-rolled stainless steel with nickel ferrite was studied by means of optical microscope, electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) Forming Reason and Influence on Mechanical Properties. The results show that the ferrite structure is refined due to the transformation of austenite forming elements such as nickel, and the ferrite microstructure can be obtained under a certain heat treatment process. The ferrite subgrains and the small crystal grains Constitute the dispersion of the organization, the organization evenly distributed in the ferrite matrix, played a “second phase ” enhanced role, so as to ensure better ductility of ferritic stainless steel, while greatly improving its strength.