合金元素对镁合金热裂倾向及粘模性能的影响研究
Study on the effect of alloying elements on the hot tearing tendency and mold adhering properties of magnesium alloys
徐玉棱 1赵华 2宋江凤2
作者信息
- 1. 中国宝武钢铁集团宝钢金属有限公司技术中心,上海 200940
- 2. 重庆大学材料科学与工程学院国家镁合金材料工程技术研究中心,重庆 400044
- 折叠
摘要
选择Mg-1Ca,Mg-3Al-0.5Zn和Mg-3Al-0.5Zn-2Ca合金作为研究对象进行热裂倾向及粘模行为实验研究,系统研究了三个合金熔液与SWPH13钢在高温处理后界面层的微观组织.采用Pan-dat和Thermo-Calc热力学软件计算了Mg-3Al-x Ca,Mg-3Al-0.5Zn-x Ca和Mg-3Al-1Zn-x Ca系合金的相图和部分合金的凝固曲线.计算结果表明,随着Zn元素的加入,合金的凝固区间大幅度增加,提高了镁合金的热裂倾向.Mg-1Ca合金与SWPH13钢界面处可能形成了CaO化合物.Ca元素的添加加速了Al元素在Mg-3Al-0.5Zn-2Ca/SWPH13钢界面的偏聚,并形成AlFe相,进而导致该合金与模具产生粘连现象.
Abstract
This study selects Mg-1Ca,Mg-3Al-0.5Zn,and Mg-3Al-0.5Zn-2Ca alloys as the research objects for experimental research on hot tearing tendency and mold adhesion behavior.The microstruc-tures of the interface layer between the three alloy melts and SWPH13 steel after high-temperature treatment are systematically studied.The phase diagrams and solidification curves of Mg-3Al-xCa,Mg-3Al-0.5Zn-xCa,and Mg-3Al-1Zn-xCa alloys are calculated by using Pandat and Thermo-Calc thermodynamics.Combined with the calculation and analysis results,the solidification range of the al-loy significantly increases with the addition of Zn element,improving the hot tearing tendency of mag-nesium alloys.CaO compound may is formed at the interface between Mg-1Ca alloy and SWPH13 steel.The addition of Ca element accelerates the segregation of Al element at the interface of Mg-3Al-0.5Zn-2Ca/SWPH13 steel,forming an AlFe phase,which in turn leads to adhesion between the alloy and the mold.
关键词
镁合金/热裂倾向/粘模性能Key words
Mg alloys/hot tearing tendency/mold adhering properties引用本文复制引用
基金项目
国家重点研发计划(2021YFB3701100)
出版年
2024
NETL
NSTL
万方数据