摘要
在不同挤压温度下进行了新能源汽车用含钒钛镁合金Mg-6Al-1Zn-0.8Ti-0.4V的挤压实验,并进行了合金的显微组织和力学性能测试与分析。结果表明:随挤压温度升高(300~400℃),合金的显微组织先细化后粗化,力学性能先提高后下降。当挤压温度为375℃时,试样具有最佳强度,此时抗拉强度和屈服强度分别达到310、212 MPa。与300℃挤压温度相比,采用375℃挤压时Mg-6Al-1Zn-0.8Ti-0.4V镁合金的抗拉强度增大8.8%,屈服强度增大15.2%,断裂方式由解理断裂变为韧性断裂。新能源汽车用含钒钛镁合金Mg-6Al-1Zn-0.8Ti-0.4V的挤压温度优选为375℃。
The extrusion experiments of vanadium-titanium magnesium alloy Mg-6Al-1Zn-0.8Ti-0.4V for new energy automobile were carried out at different extrusion temperatures. And the microstructure and mechanical properties of the alloy were tested and analyzed. The results show that with the increase of extrusion temperature from 300 ℃ to 400 ℃, the microstructure of the alloy is first refined and then coarsened, and the mechanical properties first increase and then decrease.When the extrusion temperature is 375 ℃, the sample has the best strength, and the tensile strength and yield strength reach 310 MPa and 212 MPa, respectively. Compared with those of the extrusion temperature of 300℃, the tensile strength of Mg-6Al-1Zn-0.8Ti-0.4V magnesium alloy increases by 8.8% and the yield strength increases by 15.2% when it is extruded at375℃. The fracture mode changes from dissociation fracture to ductile fracture. The optimized extrusion temperature of vanadium-titanium magnesium alloy Mg-6Al-1Zn-0.8Ti-0.4V for new energy automobile is 375℃.
作者
张阳
张超英
ZHANG Yang;ZHANG Chaoying(Inner Mongolia Communications Vocational and Technical College,Chifeng 024005,China;School of Materials,Beijing University of Technology,Beijing 100081,China)
出处
《热加工工艺》
北大核心
2020年第11期94-96,共3页
Hot Working Technology
基金
内蒙古自治区高等学校科学研究项目(NJ10106)。
