【摘要】 研究了铝硅合金凝固收缩率与硅含量的关系和无凝固收缩铝硅合金的力学性能。结果发现:铝硅合金的凝固收缩率随硅含量增加而减小,在硅含量为25%时,其凝固收缩率为零。熔体温度处理可大大提高无凝固收缩铝硅合金的力学性能,熔体温度处理后无凝固收缩铝硅合金在铸态和T6处理下的硬度分别达到了119HB和161HB。熔体温度处理后无凝固收缩铝硅合金的耐磨性远高于45钢,其耐磨性在铸态和T6处理下分别为45钢的1.79倍和4.25倍。更多还原

【Abstract】 The effect of the content of slilicon on the shrinkage of aluminum-silicon alloy in the solidification process has been determined and the mechanical properties of the developed aluminum-silicon alloy without solidification shrinkage has been studied in this paper. It is found that the shrinkage of aluminum-silicon alloy in the solidification process decreases with increasing the content of silicon. When the content of silicon is increased beyond 25%, the shrinkage of aluminum-silicon alloy decreases to 0. The melt treatment can improve the mechanical properties of the aluminum-silicon alloy without solidification shrinkage. After melt treatment, the values of HB for the as-cast sample and the sample via T6 heat treatment are 119 and 161, respectively. The abrasion resistance of the aluminum-silicon alloy without solidification shrinkage is higher than that of 45 steel. The values of the abrasion resistance for the as-cast sample and the sample via T6 heat treatment are (1.79) and 4.25 times of 45 steel, respectively.更多还原