冷却速度对Mg-4Zn合金组织和性能的影响  

Effect of Cooling Rate on Microstructure and Property of Mg-4Zn Alloy

作　　者：胡中潮 崔元胜 王振玲[3] 于玉城[3] 

机构地区：[1]天津那诺机械制造有限公司,天津300457 [2]空军驻山东地区军事代表室,山东济南250023 [3]黑龙江科技大学材料科学与工程学院,黑龙江哈尔滨150022

出　　处：《天津科技》2016年第9期31-33,共3页Tianjin Science & Technology

摘　　要：采用金相显微镜、X射线衍射仪、电子万能拉伸试验机、电化学工作站研究了冷却速率对Mg-4Zn合金的组织、力学性能、耐腐蚀性能的影响。结果表明:随着冷却速度的增加,晶粒细化,其压缩抗压强度和压缩屈服强度由普通金属型模具的249 MPa和212 MPa增加到铜管吸铸后在水中冷却时的314 MPa和231 MPa。此外,自腐蚀电位由金属型的-1.49 V增加到液氮的-1.40 V。冷却速率增加,Mg-4Zn合金的耐腐蚀性能有所改善。The effect of cooling rate on the microstructure, mechanical property and corrosion resistance of Mg-4Zn alloy were studied using optical microscope, X-ray diffractometer, and universal tensile testing machine as well as electrochemical workstation. The results showed that the grain of Mg-4Zn alloy refined when cooling rate increased, and its compressive strength and yield strength increased from 249 MPa and 212 MPa under normal metal mold to 314 MPa and 231 MPa respec-tively in the water cooling electrochemical workstation. Furthermore, the corrosion potential of Mg-4Zn alloys increased from -1.49 V to -1.40 V. The corrosion resistance of Mg-4Zn alloy improved to some extent as the cool rate increased.

关 键 词：冷却速率 Mg-4Zn 合金 压缩性能 耐腐蚀性能 显微组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]