摘要
采用脉冲爆炸-等离子体技术(PPD)在TC4钛合金表面制备改性层,研究了脉冲次数(n)对改性层显微结构、相组成、表面粗糙度、硬度及耐磨性的影响。结果表明:PPD处理使TC4钛合金表面发生快速熔凝并诱发马氏体相变,改性层的主要物相为Ti、TiN、Ti_xOy。改性层厚度和材料表面粗糙度(Ra)随脉冲次数的增加而增大。改性层硬度在近表面10μm处达到最大,为561.4 HK0.01,较基体提高约69.1%。在载荷为2、4、6 N下,与基体试件相比,脉冲2次试件磨损体积分别减少93.6%、78.7%、34.7%,耐磨性提升明显。
Plasma-pulsed detonation(PPD)technology was used to prepare modified layer on TC4 titanium alloy surface.The effects of pulse numbers on the microstructure,phase composition,surface roughness,hardness and wear resistance of the modified layer were studied.The results show that PPD treatment can result in rapid melting and solidifying,the martensitic transformation on the surface of TC4 titanium appears.The main phases of the modified layer are Ti,TiN and Ti_xOy.The thickness and surface roughness(Ra)of the modified layer increase with the pulse numbers increasing.The highest hardness of the modified layer reaches 561.4 HK0.01 at the position of 10μm from the surface,which is about 69.1%higher than that of the substrate.When the load is 2N,4N and 6N,compared with that of the substrate,the wear volume of the treated samples decreases by 93.6%,78.7%and 34.7%,respectively,and then the wear resistance improves obviously.
作者
陈宇海
陆德平
罗军明
陆磊
张林伟
余玖明
CHEN Yuhai;LU Deping;LUO Junming;LU Lei;ZHANG Linwei;YU Jiuming(School of Material Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;Institute of Applied Physics,Jiangxi Academy of Science,Nanchang 330029,China)
出处
《热加工工艺》
北大核心
2020年第4期80-84,共5页
Hot Working Technology
基金
国家自然科学基金项目(51764041)
科技部国际科技合作项目(2013DFR50900)
江西省对外科技合作计划项目项目(2012-1BDH80031,20133BDH80012).
关键词
TC4钛合金
脉冲爆炸-等离子体技术
表面改性
组织结构
耐磨性
TC4 titanium alloy
plasma-pulsed detonation(PPD)technology
surface modification
microstructure
wear resistance
