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王敬丰,彭星,王奎,胡豪,高诗情,王金星,潘复生.高强韧镁合金大规格型材挤压成形的数值模拟及实验研究[J].稀有金属材料与工程(英文),2020,49(5):1665~1673.[wangjingfeng,Peng Xing,Wang Kui,Hu Hao,Gao Shiqing,Wang Jinxing and Pan Fusheng.Numerical simulation and experimental study on extrusion forming of high strength tough magnesium alloy large size profiles[J].Rare Metal Materials and Engineering,2020,49(5):1665~1673.]
Numerical simulation and experimental study on extrusion forming of high strength tough magnesium alloy large size profiles
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Received:April 02, 2019  Revised:April 24, 2019
DOI:
Key words: high strength tough magnesium alloy  extrusion  numeric simulation  mechanical properties
Foundation item:国家重点研发计划项目(2016YFB0301102);国家自然科学基金面上项目(51874062);中央高校基本科研业务费专项项目(2018CDGFCL0005,2019CDXYCL0031)
Author NameAffiliation
wangjingfeng,Peng Xing,Wang Kui,Hu Hao,Gao Shiqing,Wang Jinxing and Pan Fusheng  
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Abstract:
      The demand and requirements of large-size magnesium alloy profiles in the field of rail transit and other fields are increasing. The high strength tough magnesium alloy profiles have high trial mold cost, long development cycle and difficult preparation. In this paper, the HyperXtrude software is used to simulate the profile structure of the large-size high-strength and tough Mg-9Gd-4Y-1Zn-0.8Mn alloy rail transit support beam. Under the premise of ensuring the successful extrusion of large-size high-strength and tough magnesium alloy support beam profiles, the preferred process is determined. The extrusion temperature is 470 ℃, the extrusion speed is 0.3 mm/s, and the maximum pressing force required under the process is determined which is 34606 KN. The large-size high-strength and tough magnesium alloy support beam profile used in rail transit with good surface quality, uniform composition and homogeneous structure is successfully prepared. The tensile strength of each part of the profile is above 370 MPa, the elongation is above 10%, and the highest strength is 391 MPa. The strength of the aging state is obviously improved, reaching 460 MPa or more, and the elongation is slightly decreased, exceeding 8%. The highest strength reaches 475 MPa.