稀土Y及Al-5Ti-B细化剂复合添加对A356铝合金组织和力学性能的影响  

Effect of Rare Earth Y and Al-5Ti-B refiner co-alloying onthe microstructure and mechanical properties of A356 aluminum alloy

作　　者：孙晓斌 张乐 陈彦孜 陈林[1] SUN Xiaobin;ZHANG Le;CHEN Yanzi;CHEN Lin(Materials Scrence and Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料科学与工程学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2024年第2期119-122,共4页Journal of Inner Mongolia University of Science and Technology

摘　　要：用Al-20Y变质剂和Al-5Ti-B细化剂处理A356铝合金熔体,研究稀土Y与Al-5Ti-B复合添加对A356铝合金组织和力学性能的影响。结果表明:稀土Y和Al-5Ti-B复合添加能提高形核率、细化α-Al晶粒尺寸和改变共晶硅形貌,共晶硅的形貌由针状和板片状变为短杆状和颗粒状,使铸造铝合金的力学性能提高。添加稀土Y和Al-5Ti-B的A356铸造铝合金的抗拉强度、屈服强度和延伸率分别为146 MPa、98 MPa和4.0%。The melt of A356 aluminum alloy was treated with Al-20Y denaturant and Al-5Ti-B refiner to study the effects of the composite addition of Rare Earth Y and Al-5Ti-B on the microstructure and mechanical properties of A356 aluminum alloy.The results showed that the addition of Rare Earth Y and Al-5Ti-B can improve the nucleation rate,refine theα-Al grain size and change the eutectic silicon morphology,and the eutectic silicon morphology change from needle-like and slab-like to short rod-like and granular,which improve the mechanical properties of the cast aluminum alloy.The tensile strength,yield strength and elongation of A356 cast aluminum alloy with the addition of Rare Earth Y and Al-5Ti-B are 146 MPa,98 MPa and 4.0%,respectively.

关 键 词：稀土Y Al-5Ti-B A356铝合金 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]