表面渗铝改性镁合金的轧制组织性能

楚志兵; 吕阳阳; 唐宾; 黄庆学; 马立峰

doi:10.13801/j.cnki.fhclxb.20141224.001

表面渗铝改性镁合金的轧制组织性能

1.
太原科技大学重型机械教育部工程研究中心, 太原 030024;
2.
太原理工大学表面工程研究所, 太原 030024;
3.
中国重型机械研究院股份公司板带精整与处理研究所, 西安 710032

基金项目: 国家自然科学基金(51105264, 51104104); 教育部博士点基金(20111415110001); 太原科技大学校博士基金(20122017)

详细信息

通讯作者:
黄庆学, 教授, 研究方向为现代轧制理论及工艺技术等。 E-mail: hqx@tyust.edu.cn.

中图分类号: TG146.2
计量
- 文章访问数: 1212
- HTML全文浏览量: 66
- PDF下载量: 814
出版历程
- 收稿日期: 2014-09-24
- 修回日期: 2014-12-09
- 刊出日期: 2015-10-14

Structure and properties on surface of aluminizing-modification magnesium alloy in rolling

1.
Heavy Machinery of Engineering Research Center of Ministry of Education, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2.
Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
3.
Research Institute of Strip Finishing and Processing, China Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, China

摘要

摘要: 引入"固态扩渗+轧制"一种新的表面改性方式, 在研究镁合金薄板表面改性方法及工艺的基础上, 采用固态扩渗的方法对AZ31镁合金薄板进行表面渗铝改性处理获得Al/AZ31镁基复合材料;借助有限元软件LS-DYNA模拟其冷轧过程, 获得最优轧制工艺条件并进行轧制试验, 通过XRD、SEM、金相显微镜、布氏硬度测量计、往复式摩擦磨损试验机和CorrTest腐蚀电化学测试系统检测材料表面的组织性能。结果表明:Al/AZ31镁基复合材料轧制变形后表面形变强化使表面组织晶粒更加细小、均匀, 同时产生新的物相MgAl₂O₄, 使其耐磨耐腐蚀性得到改善, 表面布氏硬度从HB61.4提高到HB63.5, 摩擦因数由0.52提高为0.60, 表面摩擦磨损质量损失从0.33 mg减小到0.26 mg;表面耐腐蚀性能显著提高, 自腐蚀电位从-1.49 V提高为-1.38 V, 自腐蚀电流密度从6.2×10^-3 mA/cm²降为7.0×10^-4 mA/cm²。采用"固态扩渗+轧制"的方法获得的Al/AZ31镁基复合材料的耐磨性有所改善, 耐腐蚀性能显著提高。
- 轧制 /
- 固态扩渗 /
- 复合材料 /
- 镁合金 /
- 表面性能
Abstract: A new method of surface modification, "solid diffusion + rolling" was introduced, which means on the basis of studying surface modification method and technology of magnesium alloy sheet, solid diffusion method was applied to perform surface aluminizing-modification on AZ31 magnesium alloy sheet and obtain the Al/AZ31 magnesium matrix composite and by aid of finite element software LS-DYNA to simulate the cold rolling process to obtain optimum rolling technology conditions and rolling tests were performed. By means of the following appliances to test surface organization performance of material: XRD, SEM, metallographic microscope, Brinell hardness tester, reciprocating friction & wear tester and CorrTest corrosion electro-chemistry test system. The result indicates that the grain of Al/AZ31 magnesium matrix composite surface organization becomes much tinier and even due to surface deformation strengthening after rolling deformation, and a new phase MgAl₂O₄is produced simultaneously making abrasion and corrosion resistance better which are manifested in surface Brinell hardness improving from HB61.4 to HB63.5, friction coefficient improving from 0.52 to 0.60, surface friction wear mass loss decreasing from 0.33 mg to 0.26 mg, self corrosion potential improving from -1.49 V to -1.38 V (surface corrosion resistance is improved significantly) and current density for self corrosion decreasing from 6.2×10^-3 mA/cm² to 7.0×10^-4mA/cm². Abrasion resistance for Al/AZ31 magnesium matrix composite through "solid diffusion + rolling" is getting better as well as corrosion resistance.
- rolling /
- solid diffusion /
- composites /
- magnesium alloy /
- surface performance

HTML全文

参考文献(0)

施引文献(6)

期刊类型引用(4)

1.	刘奋军，宁祥，白艳霞，申志康，陈海燕. AZ31镁合金表面激光熔覆Al-TiC复合涂层微观组织与腐蚀性能. 复合材料学报. 2023(02): 959-969 . 本站查看
2.	赵惠，赵佳怡，王艺卓，白一凡，宋辰灏，杨坤. 镁基层状复合板材微观组织与性能研究. 热加工工艺. 2023(10): 59-63 . 百度学术
3.	赵华瑞，丁彦霞. 热轧压下率对车用大厚度比镁铝合金板组织和力学性能的影响. 锻压技术. 2021(10): 99-105 . 百度学术
4.	刘纹序，李秀兰，周新军. AZ81镁合金表面固态扩渗Al、Zn渗层形成机理. 表面技术. 2018(08): 36-41 . 百度学术