多元合金化亚共晶铝硅合金组织及强度的研究  

Study of Microstructure and Strength of Multi-alloying Hypo-eutectic Al-Si Alloy

作　　者：黄笑梅[1] 徐通 周宏伟 程和法[1] HUANG Xiaomei;XU Tong;ZHOU Hongwei;CHENG Hefa(College of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《热加工工艺》2022年第17期19-21,26,共4页Hot Working Technology

摘　　要：采用Sr对含Si量为10.5%的亚共晶铝硅合金进行变质以细化共晶硅组织,并进行Cu、Ni、Zn、Mg等多元合金化及热处理以提高合金的强度。结果表明:加入0.06%Sr能够使合金中的共晶硅由粗大的针状转变为细小且弥散的纤维状。加入3.5%Cu、1.0%Ni、1.0%Mg及0.5%Zn等元素进行多元合金化,采用0.06%Sr变质处理,并经过520℃固溶6 h和185℃时效6 h的处理,可以使亚共晶铝硅合金的室温抗拉强度达到347.7MPa。The microstructure of hypo-eutectic Al-Si alloy with Si content of 10.5% was modified by Sr modification to refine the structure of eutectic silicon, and Cu,Ni,Zn, Mg and other multi-alloying and heat treatment were carried out to improve the strength of the alloy. The results show that the eutectic silicon in the alloy can be changed from coarse acicular to fine and diffuse fibrous by adding 0.06% Sr. Adding 3.5% Cu,1.0% Ni,1.0% Mg, 0.5% Zn and other elements for multi-alloying,0.06% Sr modification treatment, and then solid solution 520℃ for 6 h and aging 185℃ for 6 h treatment, the room temperature tensile strength of hypoeutectic aluminum silicon alloy can reach 347.7 MPa.

关 键 词：亚共晶铝硅合金 合金化 SR变质 

分 类 号：TG243[金属学及工艺—铸造] TG166.3