近液相线温度注射对AZ91D合金组织和力学性能的影响  

Effects of Near-liquidus Temperature Injection on Microstructure and MechanicalProperties of AZ91D Alloy

作　　者：郭春榕 谢胜川 陈炽辉 王加军 王宏平 傅侠 陈勇 李祥 GUO Chunrong;XIE Shengchuan;CHEN Chihui;WANG Jiajun;WANG Hongping;FU Xia;CHEN Yong;LI Xiang(Guangdong Provincial Key Laboratory of Intelligent Molding Equipment Enterprises,Yizumi Holdings Co.,Ltd.,Foshan 538000;Ningbo Sinyuan ZM Technology Co.,Ltd.,Ningbo 315000)

机构地区：[1]伊之密股份有限公司广东省智能化模压成型装备企业重点实验室,佛山528000 [2]宁波星源卓镁技术股份有限公司,宁波315000

出　　处：《特种铸造及有色合金》2024年第7期949-954,共6页Special Casting & Nonferrous Alloys

基　　金：国家重点研发计划资助项目(2022YFB3403200)。

摘　　要：基于AZ91D合金的近液相线温度下,采用注射成形法制备半固态镁合金,分析了不同温度下AZ91D合金的显微组织,并测试其室温力学性能。利用光学显微镜(OM)和扫描电镜(SEM/EDS)观察合金组织;采用X射线衍射仪(XRD)进行相组成分析。结果表明,AZ91D合金主要由α-Mg基体、β-Mg_(17)Al_(12)相组成;注射温度为595℃和600℃有利于获得精细且弥散分布的初生球状晶;595℃和600℃注射成形的AZ91D合金力学性能最优,抗拉强度、屈服强度、伸长率分别为274 MPa、163 MPa、8.4%和269 MPa、162 MPa、6.1%,均高于国家标准规定液态压铸件的下限值。The semi-solid magnesium alloys were prepared using injection molding at near liquidus temperatures based on AZ91D alloy.The microstructure of AZ91D alloy at different temperatures was analyzed,and room temperature mechanical properties were measured.Microstructure of the alloy was observed by optical microscopy(OM),and scanning electron microscopy(SEM/EDS).Phase composition analysis was performed by X-ray diffraction(XRD).The results indicate that AZ91D alloy is mainly composed ofα-Mg matrixβ-Mg_(17)Al_(12) phase the injection temperature of 595℃and 600℃is beneficial to obtain fine and dispersed primary spherical crystals.The mechanical properties of AZ91D alloy formed by injection molding at 595℃and 600℃present desirable with tensile strength,yield strength,and elongation of 274 MPa,163 MPa,8.4%and 269 MPa,162 MPa,6.1%,respectively,which are higher than the lower limit values specified by national standards for liquid die-casting parts.

关 键 词：AZ91D合金 注射成形 半固态 近液相线 组织性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TG146.22[金属学及工艺—金属材料] TG249.2[金属学及工艺—金属学]