钛合金表面热浸铝技术的研究进展及展望  

Research Progress and Prospect of Hot Dip Aluminizing Technology for Titanium Alloy Surface

作　　者：李勇[1] 周青[1] 朱金波[1] 张田 LI Yong;Zhou Qing;ZHU Jinbo;ZHANG Tian(Chengdu Aeronautic Polytechnic,Chengdu 610100,China)

机构地区：[1]成都航空职业技术学院,成都610100

出　　处：《成都航空职业技术学院学报》2020年第2期67-70,共4页Journal of Chengdu Aeronautic Polytechnic

基　　金：四川省教育厅自然科学一般项目“航空铝合金表面原位合成AlxCry/Al2O3涂层、强化机理及失效机制研究”编号(18ZB0058);成都航空职业技术学院自然科研重点项目“7075超硬铝激光熔覆金属-陶瓷复合涂层机理研究”编号(061902)的阶段成果之一。

摘　　要：钛合金表面热浸铝技术是将预处理过的钛合金零件在熔融铝液中浸没一定的时间,在钛合金表面形成镀层以强化表面的一种表面处理技术.本文综述了钛合金表面热浸铝梯度镀层的微观生长机理和组织成分;镀层对合金硬度、耐磨性及抗高温氧化性的影响以及其他热浸铝工艺.分析了浸镀液的温度、浸镀时间及热扩散温度、时间对镀层组织和性能的影响.提出热浸铝+交变电磁场中凝固新方法的可行性.Hot dip aluminizing technology of titanium alloy surface is a surface treatment technology in which pretreated parts of titanium alloy are immersed in molten aluminum for a certain period of time and a coating is formed on the surface of titanium alloy to strengthen the surface.This paper gives an overview of the microcosmic growth mechanism and microstructure composition of hotdip aluminum gradient coatings on the surface of titanium alloys,the effect of coating on alloy hardness,wear resistance and oxidation resistance at high temperatures,and other hot dip aluminizing processes.The effects of immersion plating solution temperature,immersion time,and thermal diffusion temperature and time on the microstructure and properties of the coating are analyzed.Finally,the feasibility of a new method for solidification in hot dip aluminum+alternating electromagnetic field is presented.

关 键 词：热浸铝 温度 高温氧化 电磁场 

分 类 号：TG166.5[金属学及工艺—热处理]