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多重旋转碾压对铝合金搅拌摩擦焊缝表面的影响

郝宗斌, 李晓泉, 李阳, 刘鹏

郝宗斌, 李晓泉, 李阳, 刘鹏. 多重旋转碾压对铝合金搅拌摩擦焊缝表面的影响[J]. 焊接学报, 2017, 38(2): 125-128.
引用本文: 郝宗斌, 李晓泉, 李阳, 刘鹏. 多重旋转碾压对铝合金搅拌摩擦焊缝表面的影响[J]. 焊接学报, 2017, 38(2): 125-128.
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HAO Zongbin, LI Xiaoquan, LI Yang, LIU Peng. Impact of multiple rotating rolling on aluminum alloy friction stir weld surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 125-128.
Citation: HAO Zongbin, LI Xiaoquan, LI Yang, LIU Peng. Impact of multiple rotating rolling on aluminum alloy friction stir weld surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 125-128.
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多重旋转碾压对铝合金搅拌摩擦焊缝表面的影响

  • 1.

    南京工程学院 材料工程学院, 南京 211167;江苏省先进结构材料与应用技术重点实验室 南京 211167

  • 2.

    山东建筑大学材料科学与工程学院, 济南 250101

基金项目: 南京工程学院大学生科技创新基金资助项目

Impact of multiple rotating rolling on aluminum alloy friction stir weld surface

  • 1.

    School of Material Engendering, Nanjing Institute of Technology, Nanjing 211167, China;School of Material Science and Engendering, Shandong Architecture University, Jinan 250101, China

摘要

    摘要
  • 摘要: 运用快速多重旋转碾压（FMRR）在室温下使搅拌摩擦焊缝表面发生塑性变形，晶粒在压应力和不同方向切应力的作用下，产生位错的交割和剪切.随着碾压的进行，使得焊缝表面的晶粒细化.结果表明，试样未经碾压前，母材截面的显微硬度在80~90 HV范围内波动，当FMRR处理60 min后，表面的最大硬度达到185 HV左右，随着层深的增加，硬度值逐渐降低.垂直于表面方向，随着到表面的距离逐渐增大，晶粒尺寸逐步增大，直至达到基体晶粒尺寸.同时经过快速多重旋转碾压，细化后样品的表面硬度明显提高，随晶粒细化程度增加，硬度增大.
    Abstract: Fast multiple rotating rolling (FMRR) is used to make friction stir weld surface plastic deformation, under the effects of compressive stress and shear stress in different directions, resulting in the delivery and shear of Grain dislocations. The results show that with the rolling proceeds, the Grain on weld surface become refinement. The hardness of the base metal section within 80~90 HV range fluctuations before rolling sample, after 60 min FMRR treatment, the maximum surface hardness of about 185 HV, with increasing layer depth, the hardness value is gradually decreased. A direction perpendicular to the surface, with the distance increases from the surface, the grain size is gradually increased until it reaches the matrix grain size. After fast multiple rotating rolling. After fast multiple rotating rolling the surface hardness of the grain-refining sample has been improved significantly. That is, with the increase in the degree of grain refinement, hardness increases.
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    • 参考文献(9)
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    [2] 杨晓华, 兑卫真, 刘 刚. 表面机械研磨处理对316L不锈钢组织和性能的影响[J]. 材料热处理学报, 2007, 28(2):118-121. Yang Xiaohua, Dui Weizhen, Liu Gang. Effect of surface mechanical attrition treatment on microstructures and mechanical properties of 316L stainless steel[J]. Transactions of Materials and Heat Treatment, 2007, 28(2):118-121.
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    [9] Pengfei Chui, Kangning Suna, Chang Suna. Effect of surface induced by fast multiple rotation rolling onhardness and corrosion behavior of 316L stainless steel[J]. Applied Surface Science, 2011(257):6787-6791.
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  • 收稿日期:  2014-12-27

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