【作者】 熊新红； 费凡； 蔡建康； 章桥新；

【Author】 XIONG Xinhong;FEI Fan;CAI Jiankang;ZHANG Qiaoxin;School of Logistic Engineering,Wuhan University of Technology;

【机构】 武汉理工大学物流工程学院；

【摘要】 对添加SiC镁合金Mg-6Zn-0.6Zr在160¹90℃进行时效处理,通过金相组织分析、X射线衍射分析、断口形貌扫描分析及力学性能测试,研究了SiC的加入和时效处理对镁合金的显微组织与力学性能的影响。研究结果表明,时效处理过程能促进挤压铸造镁合金中第二相Mg₇Zn₃到Mg₄Zn₇的转变,促进了合金的韧脆转变。而添加少量的SiC能够细化合金的晶粒,提高镁合金的抗拉强度和塑性。更多还原

【Abstract】 The aging treatment at 160¹90℃ for magnesium alloys Mg-6Zn-0.6Zr and added SiC were carried out,respectively.Effect of aging treatment and SiC particle on microstructure and property of magnesium alloys were performed by analyzing metallographic structure,XRD,fracture scanning and testing of mechanical properties.The results show that the metastable phase Mg₇Zn₃ in magnesium alloy of squeezing casting is gradually decomposed into Mg₄Zn₇ after aging treatment.Aging treatment changes the brittle fracture to ductile brittle mixed fracture.A small amount of SiC particles can effectively reduce the size of the grain.The increase of the strength and plasticity of the magnesium alloy are demonstrated after adding SiC particles.更多还原