压铸工艺对汽车用镁合金组织与性能影响
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摘要
采用不同浇注温度和型腔真空压力进行了AM50Ce汽车镁合金的真空压铸试验,并进行了显微组织和力学性能的测试与分析。结果表明:在650～730℃浇注温度和1～30 kPa型腔真空压力,随浇注温度升高,型腔真空压力减小合金的强度先提高后下降。与650℃浇注相比,型腔真空压力8 KPa690℃浇注时合金抗拉强度增大89MPa(从174到263MPa),平均晶粒尺寸减小16μm(从22到6μm);690℃浇注时,与30 kPa型腔真空压力相比,采用8kPa型腔真空压力时合金抗拉强度增大71MPa(从192到263 MPa),平均晶粒尺寸减小14μm(从20到6μm)。合金的浇注温度和型腔真空压力分别优选为690℃、8 kPa。
The vacuum die casting test of AM50 Ce automobile magnesium alloy was done by using different pouring temperatures and cavity vacuum pressures. The microstructure and mechanical properties were tested and analyzed. The results show that under pouring temperature of 650-730℃ and cavity vacuum pressure of 1-30 kPa, the strength of the alloy firstly increase and then decrease with the increase of pouring temperature or decrease of cavity vacuum pressure. Compared with the pouring temperature of 650℃, the tensile strength of the alloy increases by 89 MPa(form 174 to 263 MPa) and the average grain size decreases by 16 μm(form 22 to 6 μm) when the pouring temperature is 690℃and the cavity vacuum pressure is 8 KPa.Compared with the cavity vacuum pressure of 30 kPa, the tensile strength of the alloy increases by 71 MPa(form 192 to 263 MPa)and the average grain size decreases by 14 μm(form 20 to 6 μm) when the cavity vacuum pressure is 8 kPa and the pouring temperature is 690℃. The pouring temperature and cavity vacuum pressure of the alloy are 690℃ and 8 kPa, respectively.
The vacuum die casting test of AM50 Ce automobile magnesium alloy was done by using different pouring temperatures and cavity vacuum pressures. The microstructure and mechanical properties were tested and analyzed. The results show that under pouring temperature of 650-730℃ and cavity vacuum pressure of 1-30 kPa, the strength of the alloy firstly increase and then decrease with the increase of pouring temperature or decrease of cavity vacuum pressure. Compared with the pouring temperature of 650℃, the tensile strength of the alloy increases by 89 MPa(form 174 to 263 MPa) and the average grain size decreases by 16 μm(form 22 to 6 μm) when the pouring temperature is 690℃and the cavity vacuum pressure is 8 KPa.Compared with the cavity vacuum pressure of 30 kPa, the tensile strength of the alloy increases by 71 MPa(form 192 to 263 MPa)and the average grain size decreases by 14 μm(form 20 to 6 μm) when the cavity vacuum pressure is 8 kPa and the pouring temperature is 690℃. The pouring temperature and cavity vacuum pressure of the alloy are 690℃ and 8 kPa, respectively.
引文
[1]李宜达,梁敏洁,廖海洪,等.高性能镁合金及其在汽车行业应用的研究进展[J].热加工工艺,2013,42(10):12-16.
[2]孙书娟,季业益,李强伟,等.增量等通道角挤压对汽车用AZ31镁合金组织和性能的影响[J].制造业自动化,2015(17):77-79.
[3]郑利霞,孙焕新.汽车用镁合金表面强化工艺研究[J].电镀与环保,2015,35(4):18-19.
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[5]王峰,邸金南,毛萍莉,等.镁合金汽车转向管柱支架结构分析及优化[J].机械设计与制造,2014(3):204-206.
[6]吴海江,杨飞英,徐红梅,等.汽车用镁合金铈盐改性硅烷复合膜的耐蚀性[J].材料保护,2017,50(9):48-51.
[7]陈超.超塑性镁合金汽车车轮的模锻工艺优化[J].轻合金加工技术,2017,45(1):46-50.
[8]张晓旭,杜子学.等通道角轧制对汽车车身用轻质镁合金板微观组织与力学性能的影响[J].锻压技术,2017,42(3):154-158.
[9]马春生,张治民,郭玉明,等.汽车镁合金轮毂等温挤旋成型工艺优化与试验[J].农业机械学报,2012,43(3):223-229.
[10]刘楠,赵东林.镁合金汽车控制臂锻造过程的数值模拟[J].热加工工艺,2012,41(9):79-81.
[2]孙书娟,季业益,李强伟,等.增量等通道角挤压对汽车用AZ31镁合金组织和性能的影响[J].制造业自动化,2015(17):77-79.
[3]郑利霞,孙焕新.汽车用镁合金表面强化工艺研究[J].电镀与环保,2015,35(4):18-19.
[4]严世榕,何龙军.汽车镁合金车轮的动态性能分析及结构优化设计[J].福州大学学报(自然科学版),2014,42(4):584-590.
[5]王峰,邸金南,毛萍莉,等.镁合金汽车转向管柱支架结构分析及优化[J].机械设计与制造,2014(3):204-206.
[6]吴海江,杨飞英,徐红梅,等.汽车用镁合金铈盐改性硅烷复合膜的耐蚀性[J].材料保护,2017,50(9):48-51.
[7]陈超.超塑性镁合金汽车车轮的模锻工艺优化[J].轻合金加工技术,2017,45(1):46-50.
[8]张晓旭,杜子学.等通道角轧制对汽车车身用轻质镁合金板微观组织与力学性能的影响[J].锻压技术,2017,42(3):154-158.
[9]马春生,张治民,郭玉明,等.汽车镁合金轮毂等温挤旋成型工艺优化与试验[J].农业机械学报,2012,43(3):223-229.
[10]刘楠,赵东林.镁合金汽车控制臂锻造过程的数值模拟[J].热加工工艺,2012,41(9):79-81.
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