熔体复合净化处理对砂型铸造Mg-10Gd-3Y-0.5Zr镁合金显微组织和力学性能的影响（英文）

发布时间：2019-03-15 18:16

【摘要】：采用金相分析、SEM和拉伸试验等试验方法分析和测试砂型铸造Mg-10Gd-3Y-0.5Zr镁合金熔体复合净化处理(旋转喷吹氩气结合熔剂净化)后的显微组织和室温力学性能,讨论复合处理方法净化机理。结果表明,该复合处理可以显著提高熔体质量,大幅度提高合金力学性能。熔体经过复合净化处理后,合金夹杂物体积分数从0.47%降低到0.28%,抗拉强度和伸长率从245 MPa和0.7%分别提高至312 MPa和4.5%。1%熔剂复合旋转喷吹气体净化效果甚至更优于传统的2%熔剂净化效果,熔剂的使用量减少了50%,显著提高了净化效率,并缓和了熔剂净化带来的环境污染问题。
[Abstract]:The microstructure and mechanical properties of sand casting Mg-10Gd-3Y-0.5Zr magnesium alloy melt were analyzed by metallographic analysis, SEM and tensile test at room temperature. The purification mechanism of compound treatment method is discussed. The results show that the composite treatment can significantly improve the melt quality and the mechanical properties of the alloy. After compound purification, the volume fraction of alloy inclusions decreased from 0.47% to 0.28%. The tensile strength and elongation were increased from 245 MPa and 0.7% to 312 MPa and 4.5% respectively. The combined rotary injection gas purification effect of 1% flux was even better than the traditional 2% flux purification effect, and the flux usage was reduced by 50%. The purification efficiency is significantly improved and the environmental pollution caused by flux purification is alleviated.
【作者单位】：上海交通大学轻合金精密成型国家工程研究中心金属基复合材料国家重点实验室;上海轻合金精密成型国家工程研究中心有限公司;上海航天精密机械研究所;
【基金】：Project(USCAST2012-15) supported by the SAST-SJTU Joint Research Centre of Advanced Aerospace Technology Project(B type,14QB1403200) supported by the Shanghai Rising-Star Program,China Projects(20120073120011,20130073110052) supported by the Research Fund for the Doctoral Program of Higher Education of China Project(IPP9084) supported by IPP program in SJTU,China
【分类号】：TG292

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