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Sn、Bi微合金化对6026铝合金组织、力学与切削性能的影响
Effect of Sn and Bi Microalloying on Microstructure,Mechanical Properties and Cutting Performance of 6026 Aluminum Alloy
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- DOI:
- 作者:
- 牛艳萍 石常亮 唐维学 张大鹏 覃建波
NIU Yanping;SHI Changliang;TANG Weixue;ZHANG Dapeng;QIN Jianbo
- 作者单位:
- 广东省工业分析检测中心 广东领胜新材料科技有限公司
Guangdong Center of Industrial Analysis and Testing,Guangzhou 510650,China;Guangdong Lingsheng New Materials Technology Co.,Ltd.,Foshan 528031,China
- 关键词:
- 6026铝合金 切削性能 挤压 无铅
6026 aluminum alloy cutting performance extrusion lead-free
- 摘要:
- 以Sn、Bi替代Pb,制备了无Pb易切削6026铝合金。利用光学显微镜、扫描电镜、拉伸试验机和高速车床,研究了Sn、Bi微合金化对6026铝合金显微组织、力学性能与切削性能的影响。结果表明,单独添加Bi元素的6026铝合金由α-Al基体、Mg2Si和CuAl2强化相以及低熔点单质Bi相组成;复合添加Sn、Bi元素的6026铝合金由α-Al基体、Mg2Si和CuAl2强化相以及低熔点SnBi共晶相组成,且铝合金具有更好的切削加工性能,切屑尺寸更细小,抗拉强度,屈服强度和伸长率分别为358.3 MPa,295.7 MPa和13.9%。
The lead and cutting free 6026 aluminum alloy were prepared by Sn and Bi instead of Pb.The effect of Sn and Bi microalloying on microstructure,mechanical properties and cutting performance of 6026 aluminum alloy were studied by means of optical microscope(OM),scanning electron microscope(SEM),tensile testing machine and high-speed lathe.The results show that the microstructure of 6026 aluminum alloy with Bi element is composed ofα-Al,Mg2Si,CuAl2 and Bi phases.The microstructure of 6026 aluminum alloy with Sn and Bi elements is composed ofα-Al,Mg2Si,CuAl2 and SnBi eutectic.The composite addition Sn and Bi elements makes 6026 aluminum alloy have better cutting performance,smaller chip size,tensile strength,yield strength and elongation are 358.3 MPa,295.7 MPa and 13.9%,respectively.