对00Cr18Ni10N(质量分数, %)不锈钢丝进行室温拔制, 获得了不同面缩率的不锈钢丝。拉伸实验、磁性实验与显微组织观察表明, 面缩率小于40%的形变初期阶段, 滑移与孪生是主要的变形方式, 显微组织含大量孪生片层, 亚结构由形变孪晶和位错胞组成, 抗拉强度在600---1200 MPa范围内变化. 面缩率大于40%的大变形阶段, 形变马氏体继孪生之后开始参与变形, 显微组织是纤维状的条带, 亚结构由位错胞与形状不规则、细碎的形变孪晶所组成, 抗拉强度在1200 MPa以上.
00Cr18Ni10N (mass fraction, %) stainless steel wires with different reductions of area were obtained through cold drawing. Tensile test, magnetic test and microstructure observation show that at the initial stage of deformation (ε≦40%), slipping and twinning are the main deformation mechanism, more amounts of twin lamella and dislocation cell microstruture appear, and the tensile strength changes from 600 to 1200 MPa. At the large deformation stage (ε>40%), strain induced martensites begin to take a part of deformation, the microstructure exhibits a fibrous band--like character, its substructure consists of dislocation cell and broken deformation twin with irregular shape, and the tensile strength is above 1200 MPa.
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