研究了Cu-P中间合金的快速凝固处理对Al-Si合金耐磨性的影响.TEM分析表明:在冷却速度为105～106℃/s时,Cu-P中间合金薄带的组织由纳米晶和少量的非晶组织组成,而且Cu-P中间合金中的Cu3P的晶粒尺寸由5～40 μm下降到30～50 nm.结果表明,由于强度和硬度的提高,用薄带状中间合金改性处理的Al-Si合金的耐磨性要高于用块状中间合金改性处理的Al-Si合金:磨损率由0.86％下降到0.39％.因此,用熔体快淬Cu-P中间合金进行改性处理是提高Al-Si合金的耐磨性的有效办法.
In this paper,the influence of rapid solidification of Cu-P intermediate alloy on the wear resistance of Al-Si alloy is studied.TEM analysis indicates that under the cooling speed of 103～106℃/s.the microstructure of melt-spin Cu-P ribbon consists of nano-grains and a little amount of amorphous areas,and the grain size of Cu3P in Cu-P intermediate alloy is decreased from 5～40 μm to 30～50 nm.After modified by melt-spin intermediate alloy,the wear resistance of Al-Si alloy are better than that of Al-Si alloy modified by massive ones,wear rate is decreased from 0.86% to 0.39%.Therefore,melt-spin treatment of Cu-P intermediate alloy is effective to improve the wear resistance of Al-Si alloy.
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