| 引用本文: | 何武强,陈振华,范才河,王灿让,陈鼎.Al-5Ti-B及RE对挤压铸造7075铝合金传动空心轴组织和性能的影响[J].材料科学与工艺,2011,19(4):145-148.DOI:10.11951/j.issn.1005-0299.20110429. |
| HE Wu-Qiang,CHEN Zhen-Hua,FAN Cai-He,WANG Can-Rang,CHEN Ding.Effect of Al -5Ti - B and RE on structure and properties of squeeze casting 7075 aluminium alloy hollow axle of transmission shaft[J].Materials Science and Technology,2011,19(4):145-148.DOI:10.11951/j.issn.1005-0299.20110429. |
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| 摘要: |
| 本文采用挤压铸造的方法制备了7075铝合金传动空心轴,研究了Al-5Ti-B及RE对挤压铸造7075铝合金铸件微观组织和力学性能的影响.结果表明:未加入细化剂的合金晶粒大小约为50μm,拉伸强度为454 MPa;加入0.29%RE的合金和1%A1-5Ti-B的合金,晶粒尺寸分别了减小到26μm和25μm,拉伸强度分别提高了16.3%和22.2%;同时加入0.29%RE和1%A1-5Ti-B对合金组织细化最为明显,晶粒尺寸减小到18μm,拉伸强度提高了26.6%,达到575MPa,延伸率为8.16%,布氏硬度为184. |
| 关键词: 7075铝合金 挤压铸造 传动空心轴 Al-5Ti-B RE |
| DOI：10.11951/j.issn.1005-0299.20110429 |
| 分类号:TG292 |
| 基金项目:国家自然科学基金项目资助(50974058) |
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| Effect of Al -5Ti - B and RE on structure and properties of squeeze casting 7075 aluminium alloy hollow axle of transmission shaft |
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HE Wu-Qiang, CHEN Zhen-Hua, FAN Cai-He, WANG Can-Rang, CHEN Ding
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College of Materials Science and Engineering,Hunan University,Changsha 410082,China
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| Abstract: |
| The scaled pieces of 7075 Aluminum alloy hollow axle of transmission shaft was prepared by squeeze casting process.Study on effect of Al-5Ti-B and RE on microstructure and mechanical properties of 7075 Aluminum alloy.The results show that the grain size of alloy without refinement is about 50μm,Ten-sile strength is 454MPa;The grain size of the alloy with 0.29% RE and 1% Al-5Ti-B reduces to 26μm and 25μm.Tensile strength increases by 16.3% and 22.2%;Ddding 1% Al-5Ti-B and 0.29% RE in the alloy at the same time can reform microstructure mostly.The grain size of alloy reduces to 18μm,The tensile strength increases by 26.6% and comes to 575MPa,Elongation percentage is 8.16% and brinell hardness is 184. |
| Key words: 7075 Aluminum alloy squeeze casting hollow axle of transmission shaft Al-5Ti-B RE |
