摘要
通过成分优化、变质、合金化和热处理等方法,来提高合金的硬度和强度.试验结果表明:对亚共晶铝硅合金进行变质处理,能将共晶Si由针片状变质成细小纤维状,促使合金力学性能得到改善;亚共晶合金中加入Cu和Ni等元素,经固溶+时效处理后亚共晶Al-Si合金的力学性能得到大幅度提高;当Cu含量为3.5%和Ni含量为2.0%时,合金的硬度和抗拉强度达到最大值,分别为155HBS和347.72MPa,与铸态下的相比硬度提高了38.3%、强度提高了66.8%.
Through the composition methods of optimization metamorphism,alloying and heat treatment to improve the hardness and strength of the alloy. The results show that the modification treatment of hypoeutectic Al-Si alloy, eutectic Si by needle plate can be metamorphosed into tiny fibrous and mechanical properties of alloy can be improved. When adding the element such as Cu and Ni, after solid solution and aging treatment, the mechanical properties of hypo eutectic Al-Si alloy are improved greatly; When Cu content is 3.5% and the content of Ni was 2.0%, alloy reach maximum hardness and tensile strength, 155 HBS and 347.72 MPa, respectively, compared with the as-east alloy the hardness increased by 38. 3%, the intensity is increased by 66.8%.
出处
《材料研究与应用》
CAS
2017年第4期236-239,共4页
Materials Research and Application
关键词
变质
热处理
合金化
力学性能
metamorphism
heat treatment
alloying
mechanical properties
