Cu-P中间合金的快速凝固处理对Al-Si合金耐磨性的影响(英文)

Influence of Rapid Solidification of Cu-P Intermediate Alloy on Wear Resistance of Al-Si alloy

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10^5～10^6℃／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。

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 10^5-10^6 ℃/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.