液态搅拌铸造SiC_p/ZL101复合材料研究

STUDY ON SiC PARTICULATE REINFORCED ZL101 ALUMINUM COMPOSITE

利用改进的机械搅拌法在液态下将氧化态SiC_p分散进ZL101合金液中,制备了SiC_p/ZL101复合材料。对该复合材料的复合工艺、组织和常规力学性能进行了研究。结果表明,SiC_p/ZL101复合材料中SiC_p分布均匀,与基体结合良好,SiC_p与基体界面上存在Mg和Si的富集。与基体合金相比,SiC_p/ZL101的硬度、抗拉强度和耐磨性,尤其是重载下的耐磨性显著提高,塑性虽然降低,但通过优化工艺可以使之降低得最少。

The composite of ZL101 Al alloy with 10wt％ oxidised SiC particle (10μm in average size) ware prepared by the improved liquid metal stirring process. The fabrication process, microstructur and mechanical properties, including tensile strength, hardness, elongation and wear resistance were studied. It was indicated that SiC particle is distributed uniformly in ZL101 Al alloy matrix and has a good bonding with the matrix. Mg and Si were found segregated at the SiC particle, matrix interface. The HB hardness, tensile strength, and wear resistance, particularly under heavy load, of ZL101 alloy were improved greatly with the dispersing of SiC particle. The elongation of SiC_p/ZL101 composite decreased but can be improved by controlling fabrication process.