新型Al-C晶粒细化剂的制备及对Mg-Al合金显微组织的影响研究  

Preparation of New Al-C Grain Refiner and Its Effect on Microstructure of Mg-Al Alloy

作　　者：李雨乐 张爱民 兖利鹏 郑炀婧 黄娟 Li Yule;Zhang Aimin;Yan Lipeng;Zheng Yangjing;Huang Juan(School of Materials Science and Engineering,Henan Institute of Technology,Xinxiang 453003)

机构地区：[1]河南工学院材料科学与工程学院,新乡453003

出　　处：《汽车工艺与材料》2024年第7期40-44,共5页Automobile Technology & Material

基　　金：河南工学院博士科研启动基金(KQ1848)。

摘　　要：采用原位反应烧结法制备了新型Al-5C中间合金,利用光学显微镜(OM)、X射线衍射(XRD)和扫描电子显微镜(SEM)等研究了制备工艺对Al-5C中间合金组织以及该中间合金对Mg-Al合金晶粒细化的影响。结果表明,原位反应烧结法改善了Al与C的润湿性,Al-C的反应程度与球磨时间、烧结温度、烧结时间和压块方式有关;延长球磨时间、提高烧结温度或适当延长烧结时间均能促进Al-C反应,生成细小的Al4C3颗粒;Al-5C中间合金能有效地细化Mg-3Al合金的组织,添加量(质量分数)为2%时晶粒细化效果最佳。A new Al-5C intermediate alloy is prepared by in-situ reaction sintering method.Optical Microscope(OM),X-Ray Diffraction(XRD)and Scanning Electron Microscope(SEM)are used to study the effect of the preparation process on the microstructure of Al-5C intermediate alloy and the grain refinement of Mg-Al alloy.The results show that the in-situ reaction sintering method improves the wettability of Al and C,and the reaction degree of Al-C is related to milling time,sintering temperature,sintering time and pressing method.Prolongation of milling time,increase of sintering temperature or appropriate extension of sintering time can promote the Al-C reaction,resulting in the formation of fine Al4C3 particles.Al-5C intermediate alloy can effectively refine the microstructure of Mg-3Al alloy,and the best grain refinement effect is obtained when the addition amount(mass fraction)is 2%.

关 键 词：MG-AL 合金 晶粒细化 Al-C 细化剂 原位合成 

分 类 号：U465.22[一般工业技术—材料科学与工程]