摘要
采用不同的压铸工艺对新型机械外壳用Mg-Al-Zn-Ti-V镁合金试样进行了铸造,并进行了耐磨损性能和力学性能的测试与分析。结果表明:随浇注温度、压射速度和压射比压的增加,试样的耐磨损性能和强度均先提升后下降。新型机械外壳用镁合金的压铸工艺参数优选为:700℃浇注温度、3 m/s压射速度、80 MPa压射比压。与640℃压铸温度相比,当浇注温度为700℃时,Mg-Al-Zn-Ti-V镁合金的磨损体积减小48.1%、抗拉强度增大33 MPa;与1 m/s压射速度相比,当压射速度为3 m/s时合金的磨损体积减小36.4%、抗拉强度增大29 MPa;与50MPa压射比压相比,当压射比压为80 MPa时合金的磨损体积减小50.0%、抗拉强度增大31 MPa。
New Mg-Al-Zn-Ti-V magnesium alloy specimens for mechanical shell were cast by using different die casting processes, and the wear resistance and mechanical properties were tested and analyzed. The results show that with the increase of pouring temperature, injection speed and specific pressure, the wear resistance and strength of the samples increase first and then decrease. The optimum die-casting parameters of new magnesium alloy for mechanical shell are pouring temperature of 700 ℃,injection velocity of 3 m/s and specific pressure of 80 MPa. Compared with those of die casting temperature at 640℃, the wear volume of the specimen decreases by 48.1% and the tensile strength increases by 33 MPa when the die casting temperature is700℃. Compared with those of injection rate of 1 m/s, the wear volume of the specimen decreases by 36.4% and the tensile strength increases by 29 MPa when the injection rate is 3 m/s. Compared with those of injection pressure of 50 MPa, the wear volume of the alloy decreases by 50% and the tensile strength increases by 31 MPa when the injection pressure is 80 MPa.
作者
蒋欣哲
王安标
JIANG Xinzhe;WANG Anbiao(Henan Vocational College of Applied Technology,Zhengzhou 450042,China;College of Mechanical and Electrical Engineering,Henan University of Technology,Zhengzhou 450001,China)
出处
《热加工工艺》
北大核心
2020年第13期80-84,共5页
Hot Working Technology
基金
国家自然科学基金资助项目(11372003)。
关键词
压铸工艺
镁合金
耐磨损性能
力学性能
机械外壳
die casting process
magnesium alloy
wear resistance
mechanical property
mechanical shell
