| 新复合工艺制备A356.2合金半固态坯料 |
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| 引用本文： | 薛克敏,朱广余,李萍,薛传妹,薛荣洁,王雪.新复合工艺制备A356.2合金半固态坯料[J].塑性工程学报,2011,18(2). |
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| 作者姓名： | 薛克敏 朱广余 李萍 薛传妹 薛荣洁 王雪 |
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| 作者单位： | 合肥工业大学材料科学与工程学院,合肥,230009 |
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| 基金项目： | 安徽省自然科学基金资助项目，安徽省优秀青年科技基金资助项目 |
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| 摘 要： | 采用近液相线浇注和新SIMA法相结合的新复合工艺制备A356.2合金半固态坯料,观察和分析各工艺参数下试样的显微组织特征,探讨组织演变机制。实验结果表明,在铸模水冷、浇注温度615℃下进行近液相线浇注,获得的试样显微组织较好;等径角挤压使晶粒发生明显的变形和破碎,可累积大量的变形能;保温处理过程中,随着保温温度升高和保温时间延长,液相增多,晶粒粗化,圆整度提高。
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| 关 键 词： | 近液相线浇注 等径角挤压 半固态保温处理 半固态坯料 |
Semi-solid billet of A356.2 alloy prepared by new composite technology |
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| XUE Ke-min,ZHU Guang-yu,LI Ping,XUE Chuan-mei,XUE Rong-jie,WANG Xue.Semi-solid billet of A356.2 alloy prepared by new composite technology[J].Journal of Plasticity Engineering,2011,18(2). |
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| Authors: | XUE Ke-min ZHU Guang-yu LI Ping XUE Chuan-mei XUE Rong-jie WANG Xue |
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| Affiliation: | XUE Ke-min ZHU Guang-yu LI Ping XUE Chuan-mei XUE Rong-jie WANG Xue(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009 China) |
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| Abstract: | Semi-solid billet of A356.2 alloy was prepared by nearby liquidus pouring and new SIMA method.The features of microscopic structures were observed and analyzed,the mechanism of microstructure evolution was discussed.The results show that the microscopic structures of specimen are fine when the mould is cooled by water and the pouring temperature is 615℃ nearby liquidus pouring;the grains undergo severe distortion and breaking,and large amount of deformation energy is accumulated.The liquid phase,the grain size and sphericity increase with the increase of temperature and holding time. |
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| Keywords: | nearby liquidus pouring equal channel angular extrusion semi-solid isothermal treatment semi-solid billet |
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