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电脉冲孕育处理对Al-5Cu合金热裂的影响

Effects of Electric Pulse Moeification on the Hot Cracking Tendency of Al-5Cu Alloy

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【作者】 王冰王建中齐锦刚曹力生苍大强

【Author】 Wang Bing1,2,Wang Jianzhong2,Qi Jin’gang2,Cao Lisheng3,Cang Daqiang1(1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing,China;2.Department of Materials and Chemical Engineering,Liaoning Institute of Technology,Jinzhou,China;3.Jinzhou Normal School,Jinzhou,China)

【机构】 北京科技大学冶金与生态工程学院辽宁工学院材料与化学工程学院锦州师范专科学校北京科技大学冶金与生态工程学院 辽宁工学院材料与化学工程学院

【摘要】 研究了不同电脉冲孕育处理参数对Al-5Cu合金热裂倾向的影响。结果表明,不同电脉冲孕育处理参数均可降低Al-5Cu合金的热裂倾向,处理后该合金热裂临界应力比未处理试样提高了约3倍。合金热裂倾向改善的原因是,电脉冲孕育处理细化了Al-5Cu合金组织,减少了共晶相的数量,缩短了合金凝固温度区间。

【Abstract】 The effects of electric pulse modification(EPM) on the hot cracking tendency of Al-5Cu alloy have been investigated.The results indicate that the hot cracking tendency can be effectively restrained after treated by electric pulse modification with different parameters.Moreover,the hot cracking critical stress of alloy treated by EPM is increased by 3 times or so than that of the samples without treatment,which is attributed to the grain refinement of Al-Cu alloy and the decrease of eutectic phase in boundary as well as narrow of solidified temperature zone with EPM treatment.

【关键词】 热裂Al-Cu合金电脉冲孕育处理细化
【Key words】 Hot CrackAl-Cu AlloyEPMRefinement
【基金】 国家自然科学基金资助项目(50174028)
  • 【文献出处】 特种铸造及有色合金 ,Special Casting & Nonferrous Alloys , 编辑部邮箱 ,2007年06期
  • 【分类号】TG136.1
  • 【被引频次】3
  • 【下载频次】259
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