低压铸造镁合金转向节的数值模拟与性能研究
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摘要
以低压铸造Mg-Gd-Y-Zr合金转向节为研究对象,采用AnyCasting软件模拟铸造过程,优化铸造工艺参数并进行模具设计。同时优化了合金的热处理工艺参数,获得最佳热处理参数为:500℃×8h固溶处理,200℃×24h时效处理。低压铸造镁合金转向节本体取样分析结果表明,铸件不同部位实测性能与其晶粒尺寸大小具有较高的相关性,且晶粒尺寸的测量值与模拟预测值有较高的一致性。
Low pressure die casting Mg-Gd-Y-Zr alloy steering knuckle was simulated by AnyCasting software to optimize the process parameters and to provide a guide for mould die design.The heat treatment parameters of the alloy were optimized to be solution treatment at 500℃for 8 hand aging treatment at 200℃for 24 h.The sampling analysis results show that the measured properties at different parts of the steering knuckle have a high correlation with the grain size.Also,the experimental and predicted value of grain size presents high consistency.
Low pressure die casting Mg-Gd-Y-Zr alloy steering knuckle was simulated by AnyCasting software to optimize the process parameters and to provide a guide for mould die design.The heat treatment parameters of the alloy were optimized to be solution treatment at 500℃for 8 hand aging treatment at 200℃for 24 h.The sampling analysis results show that the measured properties at different parts of the steering knuckle have a high correlation with the grain size.Also,the experimental and predicted value of grain size presents high consistency.
引文
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[3]ROKHLIN L L.Magnesium Alloys Containing Rare Earth Metals[M].London:Taylor and Francis,2003.
[4]文丽华,吉泽升.耐热镁合金研究应用现状及强化机制[J].轻合金加工技术,2014,42(12):28-34.
[5]陈晓亚,李全安,陈君,等.Gd含量对Mg-Gd-Y-Zr合金组织和性能的影响[J].材料热处理学报,2017,38(11):21-27.
[6]齐鹏远,徐悦波,刘伟杰.某重卡锻造转向节裂纹的分析研究[J].锻压技术,2016,41(4):1-4.
[7]张运军,陈天赋,杨杰,等.汽车转向节小飞边精锻技术的研发及应用[J].锻压技术,2018,43(8):1-7.
[8]杨立民.影响低压铸造铸件质量的几种因素[J].民营科技,2017(6):9-10.
[9]唐鸿.铸造方式对Mg-Gd-Y-Ag-Zr铸造合金组织和性能的影响[D].重庆:重庆大学,2017.
[10]ROKHLINL L.Advanced magnesium alloys with rare-earth metal additions[M].USA:Advanced Light Alloys and Composites,1998.
[11]胡传凯,赵强,王艳彬,等.Mg-10Gd-3Y-Zr镁合金的热处理工艺[J].金属热处理,2018,43(9):94-97.
[12]HE S M,ZENG X Q,PENG L M,et al.Microstructure and strengthening mechanism of high strength Mg-10Gd-2Y-0.5Zr alloy[J].Journal of Alloys&Compounds,2007,427(1-2):316-323.
[13]何上明.Mg-Gd-Y-Zr(-Ca)合金的微观组织演变、性能和断裂行为研究[D].上海:上海交通大学,2007
[14]徐时清,王焕平.材料科学基础[M].上海:上海交通大学出版社,2015.
[15]郝士明.材料热力学[M].北京:化学工业出版社,2003.
[16]彭渝丽,王艳山,郭永春,等.冷却速度对GW93镁合金铸态组织与性能的影响[J].铸造技术,2015,36(9):2 289-2 293.
[17]邓永瑞,许洋,赵清.固态相变[M].北京:冶金工业出版社,1996.
[18]WANG J,MENG J,ZHANG D,et al.Effect of Y for enhanced age hardening response and mechanical properties of Mg-Gd-Y-Zr alloys[J].Materials Science and Engineering,2007,A456(1-2):78-84.
[19]刘云旭.金属热处理原理[M].北京:机械工业出版社,1981.
[20]ANYANWU I A,KAMADO S,KOJIMA Y.Aging characteristics and high temperature tensile properties of Mg-Gd-Y-Zr alloys[J].Materials Transactions,2001,42(7):1 206-1 211.