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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5~40μm下降到30~50nm。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。
The effect of rapid solidification of Cu-P master alloy on the wear resistance of Al-Si alloy was studied. TEM analysis shows that the microstructure of the Cu-P master alloy ribbon is composed of nanocrystalline and a small amount of amorphous structure at the cooling rate of 105 ~ 106 ℃ / s, and the grain size of Cu3P in the Cu-P master alloy consists of 5 ~ 40μm down to 30 ~ 50nm. The results show that the wear resistance of the Al-Si alloy modified by the thin strip master alloy is higher than that of the Al-Si alloy modified by the massive master alloy due to the increase of the strength and hardness: the wear rate is increased from 0.86% Down to 0.39%. Therefore, the use of melt quenching Cu-P master alloy modified to improve the wear resistance of Al-Si alloy is an effective way.