交叉轧制对钼板材显微组织和成形性能的影响  

Effects of Cross Rolling on Microstructure and Formability of Molybdenum Sheet

作　　者：魏修宇[1,2] 

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000

出　　处：《硬质合金》2017年第2期97-102,共6页Cemented Carbides

摘　　要：本文采用力学性能测试、深冲测试、金相组织观察以及X射线宏观织构分析等实验手段,详细研究了交叉轧制对钼板材显微组织和性能的影响规律。研究结果表明,单向轧制钼板材的横向延伸率明显低于纵向延伸率,交叉轧制可明显降低钼板材力学性能的各向异性;交叉轧制使钼板材的杯突值显著提高,且使钼板材深冲时的开裂方向由单向轧制样品的横向开裂转变为交叉轧制样品的沿轧制方向45°开裂;交叉轧制钼板材的金相组织呈现出相互搭接交错的纤维状组织特征,且纵横向的组织差别较单向轧制钼板材明显减小;交叉轧制使钼板材的织构由强各向异性的旋转立方织构转变为各向异性较低的立方织构。The effects of cross rolling on the microstructure and properties of molybdenum sheet were researched by means of mechanical properties test, deep drawing test, metallographic observation and X-ray macro texture analysis. The results show that the transverse elongation of the unidirectional rolled molybdenum sheet is much lower than the longitudinal elongation. Cross rolling can obviously reduce the anisotropy of the mechanical properties of the molybdenum sheet. Cross rolling significantly increases the cupping value of the molybdenum sheet, and changes the cracking direction of the sample from along transverse direction to along 45° direction to the rolling direction. The cross-rolled molybdenum sheet shows a fibrous structure characterized by overlapping and interlacing, and the microstructure difference between the longitudinal and transverse direction is lower than that of the unidirectional rolled molybdenum sheet. Through cross rolling, the texture of the molybdenum sheet is transformed from strongly anisotropic rotational cubic texture to cubic texture with lower anisotropy.

关 键 词：钼板材 交叉轧制 显微组织 成形性 杯突值 

分 类 号：TG146.412[一般工业技术—材料科学与工程] TG339[金属学及工艺—金属材料]