摘要
采用半固态搅拌工艺制备了Mg的质量分数分别为1%、2%和3%的SiC颗粒增强A356合金基复合材料。采用光学显微镜、扫描电镜以及硬度计等研究了镁含量对复合材料中SiC颗粒的分布、孔隙率以及硬度的影响。试验结果表明:以550r/min的搅拌速度搅拌30min制备的含2%Mg的A356合金基复合材料,其SiC颗粒分布较均匀,孔隙率降低到了2.4%,硬度提高至102.10HB,具有较好的耐磨性能。
SiC particle reinforced A356 alloy-based composites having 1%,2%,and 3% Mg by mass were prepared by a semi-solid stirring procedure.The effects of magnesium contents on SiC particle distribution,porosity and hardness of the composites were investigated by optical microscopy,scanning electron microscopy and hardness tester.The experimental results showed that the A356 alloy-based composite fabricated by stirring at 550 r/min for 30 min and provided with 2% Mg exhibited more uniformly distributed SiC particles,porosity reduced to 2.4% and hardness enhanced to 102.10 HB,having better wear resistance.
作者
俞德新
程世伟
张恒华
YU Dexin;CHENG Shiwei;ZHANG Henghua(State Key Laboratory of Advanced Special Steel,Shanghai 200444,China;Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai 200444,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)
出处
《上海金属》
CAS
北大核心
2019年第3期62-66,共5页
Shanghai Metals
