Effect of Rare Earth Element Eu and Cooling Rate on Eutectic Silicon in Al-7Si Alloy
OU Liming1, MAO Feng2, QIAO Yongfeng2, GAO Mengke2, WU Xiude1, WEI Shizhong2
1 School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China 2 National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan University of Science and Technology, Luoyang 471003, China
Abstract: In view of the good modification effect of rare earth element Eu on eutectic silicon, this paper investigates the effects of different Eu content (0.04%, 0.1%, 0.16%, 0.22%, wt%), cooling rate, modification temperature, holding time and remelting times on the modification effect of Al-7Si eutectic silicon. The results show that the increase of cooling rate is beneficial to the modification of Eu element. The higher cooling rate is, the lower the Eu content is required for the complete transformation of eutectic silicon from needle to fibrous. The modification temperature and holding time will affect the modification effect of Eu element. The best modification temperature is 750 ℃, and the best holding time is 15 min. the increase of remelting times will lead to the failure of modification, The remelting times should not exceed three times without affecting the modification effect of rare earth Eu.
作者简介: 欧黎明,2018年毕业于河南科技大学,获得工学学士学位。于2018年9月至今在长江大学攻读硕士学位。 毛丰,毕业于大连理工大学,河南科技大学讲师。主要从事合金的变质和细化研究、金属基复合材料凝固过程同步辐射实时成像研究,金属基复合材料微观结构同步辐射CT成像研究。参与国家自然科学基金面上项目3项。已在Journal of Alloys and Compounds和Materials Characterization等国内外期刊上发表学术论文10余篇,其中SCI论文收录12篇。 魏世忠,西安交通大学博士研究生毕业,教授(二级),博士研究生导师,河南科技大学副校长,第十三届全国政协委员。国务院政府特殊津贴专家,“百千万人才工程”国家级人选、国家有突出贡献中青年专家,“长江学者和创新团队发展计划”创新团队带头人、并获教育部滚动支持,中国产学研合作创新奖获得者,美国密歇根大学访问学者,河南省首批中原学者科学家工作室首席科学家,河南省“中原学者”,湖北省“楚天学者”,河南省杰出专业技术人才,河南省优秀专家,河南省创新争先奖章获得者,河南省高校特聘教授,河南省科技创新团队带头人,河南省科技创新杰出人才,河南十大科技创新人物,河南省自主创新十大杰出青年。金属材料磨损控制与成型技术国家地方联合工程研究中心主任、摩擦学与材料防护教育部工程研究中心主任等。
引用本文:
欧黎明, 毛丰, 乔永枫, 高梦锞, 吴修德, 魏世忠. 稀土元素Eu和冷却速率对Al-7Si合金中共晶硅的影响[J]. 材料导报, 2021, 35(8): 8103-8107.
OU Liming, MAO Feng, QIAO Yongfeng, GAO Mengke, WU Xiude, WEI Shizhong. Effect of Rare Earth Element Eu and Cooling Rate on Eutectic Silicon in Al-7Si Alloy. Materials Reports, 2021, 35(8): 8103-8107.
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2021, Vol. 35 
