熔体温度对汽车用2024铝合金显微组织及性能的影响  

Effect of Melt Temperature on Microstructure and Properties of 2024 Al Alloy for Automobile

作　　者：边伟[1] 刘晓波[2] 

机构地区：[1]南京交通职业技术学院汽车工程系,江苏南京211188 [2]长安大学汽车学院,陕西西安710064

出　　处：《热加工工艺》2017年第3期109-110,114,共3页Hot Working Technology

摘　　要：研究了熔体温度对2024铝合金的显微结构和力学性能的影响。结果表明,升高熔体温度能显著降低合金的晶粒尺寸,改变晶体形态,提高显微硬度、抗拉强度、屈服强度和伸长率。当熔体温度为810℃时,熔体中晶粒主要是均匀的球状,其显微硬度、抗拉强度、屈服强度和伸长率均取得最大值,分别为118.3 HV、267 MPa、203 MPa、6.1%。The influence of the melt temperature on the mierostructure and mechanical properties of 2024 aluminum alloy was studied. The results show that the increase of melt temperature can significantly reduce the grain size of the alloy, change its crystal morphology, and improve its micro-hardness, tensile strength, yield strength and elongation. When the melt temperature is 810 ℃, the grains in the melt are mainly homogeneous spherical shape, and the micro-hardness, tensile strength, yield strength and elongation all achieve the maximum value, which is 118.3 HV, 267 MPa, 203 MPa and 6.1% respectively.

关 键 词：2024铝合金 熔体温度 显微结构 显微硬度 力学性能 

分 类 号：TG243[金属学及工艺—铸造]