黄文克孔凡亚
金属学报
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.
关键词:
不锈钢丝
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cold drawing
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twin lamella
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deformation twin
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strain induced martensite
ZHENG Yangzeng ZHANG Fucheng Yanshan University
,
Qinhuangdao
,
China
金属学报(英文版)
The heterogeneous distribution of C and metallic alloying elements as well as the phase com- position changes before and after cold deformation of an Fe-Mn-Cr-C alloy have been stu- died by the use of Mssbauer spectroscopy.The austenites without and with C and metallic alloying elements are found in the alloy in as-solid solution state.While the martensites with- out and with C and alloying elements may be induced by cold deformation.The transforma- tion from austenite to martensite in the alloy is confirmed via theoretical computation and ex- periments to be controlled by the number of covalent electron pairs forming covalent bond in austenitic crystal cell of the alloy.The formation of strong covalent bond between C and me- tallic elements can vigorously retard the γ/α' transformation.
关键词:
heterogeneity
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