摘要
对轧制态AZ80镁合金板材进行了表面机械研磨处理。借助显微组织观察、拉伸性能测试、硬度测试、摩擦磨损测试等方法,研究了机械研磨处理对AZ80镁合金组织和性能的影响。结果表明,AZ80镁合金经3 min的表面机械研磨处理后,表面形成了85μm的超细晶层,晶粒大小从表层到中心呈梯度变化分布。抗拉强度提高了17.0%,屈服强度提高了26.4%,伸长率降低了47.7%,表层硬度提高了53.2%,硬度影响区域400%μm。与原始试样相比,载荷小于30 N时,经表面研磨处理试样的耐磨性能更好;载荷大于30 N以后,表面研磨处理试样的磨损性能反而更差。
The surface mechanical attrition treatment （SMAT） was carried out on the rolled state AZ80 magnesium alloy sheet. By microstructure observation, tensile performance testing, hardness testing, wear test, the effects of SMAT on the microstructure and properties of AZ80 magnesium alloy were studied. The results show that the microcrystalline layer with 85 μm thickness appears on the surface of AZ80 magnesium alloy after the surface mechanical abrasion for 3 min. The grain size is in gradient variation from the top layer to the center. The tensile strength increases by 17.0%, the yield strength increases by 26.4%, the elongation rate decreases by 47.7%, and the surface hardness increases by 53.2%, the hardness affected area is 400 p.m. Compared with the original sample, when the load is less than 30 N, the wear-resisting performance of the sample after surface mechanical attrition treatment is better, when the load is greater than 30 N, the wear-resisting performance of the sample after SMAT is worse.
作者
张晓莹
ZHANG Xiaoying(College of Mechanical Engineering, Zhengzhou University of Science ＆ Technology, Zhengzhou 450064, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第8期111-113,共3页
Hot Working Technology
基金
河南省科技厅科技攻关项目(172102210533)
河南省教育厅高等学校重点科研项目(17A460028)
