| Strengthening technology and mechanism for semi-solid die casting of aluminum alloy |
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| 引用本文： | 张恒华,许珞萍,邵光杰,余忠土. Strengthening technology and mechanism for semi-solid die casting of aluminum alloy[J]. 中国有色金属学会会刊, 2003, 13(6): 1280-1284 |
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| 作者姓名： | 张恒华 许珞萍 邵光杰 余忠土 |
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| 作者单位： | SchoolofMaterialsScience,ShanghaiUniversity,Shanghai200072,China |
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| 摘 要： | Combined with theoretical evaluation,an optimized strengthening process for the semi-solid die castings of A356 aluminum alloy was obtained by studying the mechanical properties of castings solution treated and aged under different conditions in detail,then,the semi-solid die castings and liquid die castings were heat treated with the optimized process.The results show that the mechanical properties of semi-solid die castings of aluminum alloy are superior to those of the liquid die castings,especially the strengthening degree of heat treated semi-solid die castingsis much greater than that of liquid die castings with the tensile strength more than 330 MPa and the elongation more than 10％,and this is mainly contributed to the non-dendritic and more compact microstructure of semi-solid die castings.The strengthening mechanism of heat treatment for the semi-solid die castings of A356 aluminum alloy is due to the dispersive precipitation of the second phase(Mg2 Si) and formation of GP Zone.
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| 关 键 词： | A356合金 铝合金 半固态铸造 强化技术 热处理 |
Strengthening technology and mechanism for semi-solid die casting of aluminum alloy |
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| ZHANG Heng-hua,XU Luo-ping,SHAO Guang-jie,YU Zhong-tu. Strengthening technology and mechanism for semi-solid die casting of aluminum alloy[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(6): 1280-1284 |
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| Authors: | ZHANG Heng-hua XU Luo-ping SHAO Guang-jie YU Zhong-tu |
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| Abstract: | Combined with theoretical evaluation, an optimized strengthening process for the semi-solid die castings of A356 aluminum alloy was obtained by studying the mechanical properties of castings solution treated and aged under different conditions in detail, then, the semi-solid die castings and liquid die castings were heat treated with the optimized process. The results show that the mechanical properties of semi-solid die castings of aluminum alloy are superior to those of the liquid die castings, especially the strengthening degree of heat treated semi-solid die castings is much greater than that of liquid die castings with the tensile strength more than 330 MPa and the elongation more than 10%, and this is mainly contributed to the non-dendritic and more compact microstructure of semi-solid die castings. The strengthening mechanism of heat treatment for the semi-solid die castings of A356 aluminum alloy is due to the dispersive precipitation of the second phase(Mg_2Si) and formation of GP Zone. |
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| Keywords: | aluminum alloy semi-solid die casting strengthening of heat treatment microstructure |
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