锻压态AZ80汽车轮毂用镁合金的组织和力学性能研究
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摘要
为了研究锻压态AZ80汽车轮毂用镁合金的显微组织和力学性能,采用不同的始锻温度和终锻温度进行了合金的锻压试验,并进行了显微组织和室温力学性能的测试与分析。结果表明,当始锻温度为430~510℃、终锻温度为320~400℃时,始锻温度和终锻温度对AZ80汽车轮毂用镁合金的抗拉强度和屈服强度影响较大,对断后伸长率影响较小。合金锻压时的始锻温度和终锻温度分别优选为470和360℃。采用优选的始锻温度和终锻温度时,锻压态AZ80汽车轮毂用镁合金的平均晶粒尺寸达到最小值11.4μm、抗拉强度达到最大值386 MPa、屈服强度达到最大值287 MPa。
In order to study microstructures and mechanical properties of forged magnesium alloy AZ80 for automobile hub,the forging tests were conducted at different initial forging temperatures and final forging temperatures,and the microstructures and mechanical properties at room temperature were tested and analyzed. The results show that when the initial forging temperature is in the range of 430 ℃and 510 ℃,and the final forging temperature is between 320 ℃ and 400 ℃,both the initial forging temperature and the final forging temperature have great effect on the tensile strength and yield strength of magnesium alloy AZ80 for automobile hub,which have little effect on the elongation after fraction. Therefore,the initial forging temperature and the final forging temperature of alloy are optimized at 470 ℃and 360 ℃,respectively. Furthermore,using the optimized initial forging temperature and final forging temperature,the average grain size of forged magnesium alloy AZ80 for automobile hub reaches the minimum value of 11. 4 μm,and the tensile strength and yield strength of alloy reach the maximum value of 386 MPa and 287 MPa,respectively.
In order to study microstructures and mechanical properties of forged magnesium alloy AZ80 for automobile hub,the forging tests were conducted at different initial forging temperatures and final forging temperatures,and the microstructures and mechanical properties at room temperature were tested and analyzed. The results show that when the initial forging temperature is in the range of 430 ℃and 510 ℃,and the final forging temperature is between 320 ℃ and 400 ℃,both the initial forging temperature and the final forging temperature have great effect on the tensile strength and yield strength of magnesium alloy AZ80 for automobile hub,which have little effect on the elongation after fraction. Therefore,the initial forging temperature and the final forging temperature of alloy are optimized at 470 ℃and 360 ℃,respectively. Furthermore,using the optimized initial forging temperature and final forging temperature,the average grain size of forged magnesium alloy AZ80 for automobile hub reaches the minimum value of 11. 4 μm,and the tensile strength and yield strength of alloy reach the maximum value of 386 MPa and 287 MPa,respectively.
引文
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[3]李晓强.铝合金轮毂,汽车轮胎材料建设的新方向——针对汽车铝合金轮毂的铸造工艺研究[J].黑龙江科技信息,2016,(27):124.Li X Q.The new direction of the aluminum alloy wheel and the construction of automobile tire materials-Research on the casting technology of the aluminum alloy wheel of the automobile[J].Heilongjiang Science and Technology Information,2016,(27):124.
[4]张占领,张艳琴.利用Pro/E和智能专家设计系统的镁合金轮毂压铸模设计[J].铸造,2014,63(4):332-335.Zhang Z L,Zhang Y Q.Design of magnesium alloy hub casting die by using Pro/E and intelligent expert design system[J].Foundry,2014,63(4):332-335.
[5]赵树国,陈建华.汽车镁合金轮毂的优化设计[J].山东工业技术,2016,(12):59.Zhao S H,Chen J H.Optimization design of automobile magnesium alloy wheel hub[J].Shandong Industrial Technology,2016,(12):59.
[6]滕奎,李滨来,陈文云,等.时效制度对喷射成形7055铝合金机轮轮毂锻件性能的影响[J].粉末冶金材料科学与工程,2014,(1):83-88.Teng K,Li B L,Chen W Y,et al.Effect of aging treatment on properties of spray-forming 7055 aluminum alloy wheel hub forgings[J].Materials Science and Engineering of Powder Metallurgy,2014,(1):83-88.
[7]李更新.镁合金汽车轮毂预制坯超塑成形研究[J].锻压技术,2014,39(6):71-74.Li G X.Study on superplastic forming of preformed blank for magnesium alloy wheel[J].Forging&Stamping Technology,2014,39(6):71-74.
[8]曲杰,徐小琴,胡焱松,等.轮毂轴承法兰热锻工艺优化方法研究[J].机械设计与制造工程,2017,46(2):40-45.Qu J,Xu X Q,Hu Y S,et al.Study on optimization method of hot forging process of wheel hub bearing flange[J].Machine Design and Manufacturing Engineering,2017,46(2):40-45.
[9]赵平,关云卿,赵国际,等.热处理工艺对含镁新型热挤压模具性能的影响[J].锻压技术,2016,41(10):138-141.Zhao P,Guan Y Q,Zhao G J,et al.Influence of heat treatment process on the properties of new-typed hot-extruded die containing magnesium[J].Forging&Stamping Technology,2016,41(10):138-141.
[10]孙茂银,赵一生,姜科达,等.锻压温度对Cr12Mo1V1组织性能的影响[J].锻压技术,2017,42(3):130-136.Sun M Y,Zhao Y S,Jiang K D,et al.Influence of forging temperature on the microstructure and properties of Cr12Mo1V1[J].Forging&Stamping Technology,2017,42(3):130-136.