MICROSTRUCTURE EVOLUTION AND MECHANICAL HARDENING OF HYPEREUTECTOID PEARLITIC STEEL DURING COLD ROLLING

查看全文 作　　者：X. [1,2]Zhang;C.X. [2]Wang;X.M. [2]Liu;Q.N. [1]Shi

机构地区：[1]Key Laboratory of Advanced Materials of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;[2]Institute for Structural Materials, Central Iron and Steel Research Institute,Beijing 100081, China

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2007年第20卷第4期,共6页

摘　　要：The microstructure evolution of different cold rolling reductions (from 0 to 81.6%) was studied by SEM (scanning electron microscopy) and TEM (transmission electron microscope). The study showed that the orientation multiplicity of pearlitic lamellas resulted in inhomogeneous deformation of different pearlitic lamellas, and with the increase of reduction, the microstructure underwent a course of 'homogeneity → inhomogeneity → homogeneity'. The result of XRD (X-ray diffraction) analysis indicated that cementite did not decompose and dissolve into ferrite; the results of the mechanical property test suggested that the relationship between Rp0.2 (yield strength) and ε (true strain) was in good agreement with Hollomon relationship. With the equation Rp0.2 = 1465ε0.18, the yield strength of the steel in different reductions could be well predicted. 关键词：冷轧过共析钢珠光体微观结构机械硬化

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MICROSTRUCTURE EVOLUTION AND MECHANICAL HARDENING OF HYPEREUTECTOID PEARLITIC STEEL DURING COLD ROLLING

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