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利用熔铸-原位反应和压铸成形技术制备了TiC/Al-9Si-1.4Cu-0.5Mg复合材料,测试了复合材料的拉伸性能.结果表明:TiC/Al-9Si-1.4Cu-0.5Mg复合材料的室温极限拉伸强度为354MPa,比基体合金提高26%;260℃时复合材料的极限拉伸强度为272MPa,比基体合金提高46%.复合材料的延伸率与Al-9Si-1.4Cu-0.5Mg合金相当.讨论了进一步提高熔铸一原位反应TiC/Al-9Si-1.4Cu-0.5Mg复合材料拉伸强度的途径.
TiC / Al-9Si-1.4Cu-0.5Mg composites were prepared by casting-in-situ reaction and die-casting forming technology. The tensile properties of the composites were tested. The results show that the ultimate tensile strength at room temperature of TiC / Al-9Si-1.4Cu-0.5Mg composites is 354MPa, which is 26% higher than that of the matrix alloy. The ultimate tensile strength of the composites at 260 ℃ is 272MPa, Increased by 46%. The elongation of the composites is comparable with Al-9Si-1.4Cu-0.5Mg alloy. The ways to further increase the tensile strength of the in-situ TiC / Al-9Si-1.4Cu-0.5Mg composites by melt casting were discussed.