固相合成道次对ZM6-Ce镁合金组织和性能的影响  

Effect of Extruding Times on Microstructure and Mechanical Properties of ZM6-Ce Magnesium Alloy

作　　者：文丽华[1,2] 吉泽升[2] 宁慧燕[1] 毕凤阳[1] 胡茂良[1] 

机构地区：[1]黑龙江工程学院,黑龙江哈尔滨150050 [2]哈尔滨理工大学,黑龙江哈尔滨150040

出　　处：《稀有金属材料与工程》2015年第9期2305-2309,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51404082;50974048);哈尔滨市科技局青年基金(2011RFQXG020);哈尔滨理工大学"材料研究与应用"省高校重点实验室开放基金

摘　　要：采用固相合成法合成ZM6镁合金废屑和Mg-Ce中间合金屑,研究挤压合成次数对合成镁合金棒组织和性能的影响,并讨论其断裂行为。结果表明:一次挤压后,Mg-Ce中间合金屑没有被破碎,合金的力学性能较差。经5次挤压后,Mg-Ce中间合金屑的均匀分布使合金的力学性能有较大的改善。随着挤压次数的增加,合金的抗拉强度和延伸率增大,增大的幅度随着挤压次数的增加而变小。5次挤压后,合金的抗拉强度为300 MPa,延伸率为14.8%,试样的断裂方式为穿晶韧窝断裂。A method for recycling ZM6 magnesium alloy chips and Mg-Ce alloy chips by hot extrusion was studied. Effect of extruding times on microstructure and mechanical properties of the alloy was analyzed and the fracture behavior was discussed. The results indicate that after the first extrusion, tensile strength and elongation to failure of the alloy are very low because Mg-Ce intermediate alloy chips have not been broken. Tensile strength and elongation to failure of the alloy are obviously improved because of well-proportioned distribution of Mg-Ce intermediate alloy chips after the fifth extrusion. Ultimate tensile strength and elongation to failure of the alloy increase with the extrusion times increasing. Increasing range decreases with the extrusion times increasing. After the fifth extrusion, ultimate tensile strength and elongation to failure of the alloy are 300 MPa and 14.8%, respectively. Fracture mode of the specimen is transgranular dimple fracture.

关 键 词：ZM6镁合金 Mg-Ce中间合金 热挤压 组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]