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脉冲电流对ZK60镁合金板组织与性能的影响
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太原理工大学,太原理工大学,太原理工大学,太原理工大学,太原理工大学,太原理工大学

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TG146.2

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国家自然科学基金项目(50901048,51174143);国家留学基金(201308140098);教育部科学技术研究重点项目(2012017);教育部新世纪优秀人才支持计划(NCET-12-1040)


Influence of electropulsing treatment on microstructure evolution and properties of ZK60 alloy sheets
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Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology

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    摘要:

    脉冲电流作为一种新型的处理方法,对于材料组织与性能有一定的影响。本文利用光学显微镜(OM)、电子背散射衍射(EBSD)和扫描电子显微镜(SEM)对ZK60镁合金板组织与性能进行分析。利用高密度脉冲电流对轧制变形ZK60镁合金板进行处理,使变形组织在较短时间内发生完全再结晶。再结晶晶粒的平均晶粒尺寸达到3μm,抗拉强度可达310MPa,伸长率达30.7%。然而,经过同样时间的等效热处理,变形ZK60板并未发生完全再结晶。脉冲电流提高了轧制变形ZK60镁合金再结晶形核速率,加速了再结晶转变过程。脉冲处理优化了ZK60镁合金组织,使其获得了较高的综合力学性能。

    Abstract:

    As a new method, electropulsing treatment has a great impact on microstructure and properties of metallic meterials. In the present paper, the microstructure evolution of rolled ZK60 alloy was investigated by optical microscope (OM) and electron backscattered diffraction (EBSD). The properties were evaluated by tensile testing at room temperature. The complete recrystallization was liable to occur when the deformed ZK60 magnesium alloy sheets were treated by electropulsing in comparison with heat treatment. After electropusling treatment for 10min, the recrystallization grains with the average size of 3μm were obtained. The tensile stress of ZK60 alloy was improved to 310MPa and the tensile elongation was increased to 30.7%. However, the incomplete recrystallization occured in rolled ZK60 alloy which was treated by heat treatment with the same processing time. The electropulsing enhanced the nucleation rate of recrystallization for rolled ZK60 alloy and then accelerated the process of recrystallization.

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靳伟,樊建锋,张华,刘阳,董洪标,许并社.脉冲电流对ZK60镁合金板组织与性能的影响[J].稀有金属材料与工程,2016,45(10):2677~2682.[Jin Wei, Fan Jianfeng, Zhang Hua, Liu Yang, Dong Hongbiao, Xu Bingshe. Influence of electropulsing treatment on microstructure evolution and properties of ZK60 alloy sheets[J]. Rare Metal Materials and Engineering,2016,45(10):2677~2682.]
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  • 收稿日期:2014-08-07
  • 最后修改日期:2014-09-10
  • 录用日期:2014-10-30
  • 在线发布日期: 2016-11-10
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