论文部分内容阅读
采用Ce-La复合稀土对Al-20%Si合金进行变质处理,考察了稀土复合变质对Al-Si合金力学性能、耐磨性能的影响,研究了冷却速度对合金力学性能的影响。结果表明:Ce-La复合变质剂对Al-20%Si合金具有双变质作用,当稀土Ce的添加量为0.5%,La的添加量为0.6%时,Al-Si合金的力学性能最好,抗拉强度和伸长率分别为268.5 MPa、0.52%;Ce-La复合变质剂能细化合金,提高合金耐磨性;稀土共晶硅对冷却速度一定程度上较为敏感,冷却速度的提高可以有效细化合金。
Al-20% Si alloy was modified by Ce-La composite rare earth. The effect of rare earth composite modification on the mechanical properties and wear resistance of Al-Si alloy was investigated. The effect of cooling rate on the mechanical properties of Al-Si alloy was investigated. The results show that Ce-La composite modifier has double metamorphism on Al-20% Si alloy. When the content of rare earth Ce is 0.5% and La is 0.6%, the mechanical properties of Al-Si alloy are the best, The tensile strength and elongation are 268.5 MPa and 0.52% respectively. The Ce-La composite modifier can refine the alloy and improve the wear resistance of the alloy. The rare earth eutectic silicon is sensitive to the cooling rate to a certain degree, and the cooling rate can be effectively improved Refine the alloy.