钛合金表面制备阻燃层力学性能研究  

Study on Mechanical Properties of Burn-resistant Coating Prepared on Titanium Alloy Surface

作　　者：汪瑞军[1,2] 马小斌 鲍曼雨[1] Wang Ruijun;Ma Xiaobin;Bao Manyu(Beijing Jinlunkuntian Special Machine Co.,Ltd.,Beijing 100083,China;Chinese Academy of Agricultural Mechanization Sciences,Beijing 100083,China)

机构地区：[1]北京金轮坤天特种机械有限公司,北京100083 [2]中国农业机械化科学研究院,北京100083

出　　处：《航空工程进展》2019年第A02期152-156,共5页Advances in Aeronautical Science and Engineering

摘　　要：近年钛合金在航空发动机关键部件设计与制造中得到重视,“钛火”问题成为高性能航空发动机研制的重要课题。本文采用微弧脉冲离子表面改性技术在钛合金表面制备Ti40Zr25Be20阻燃改性层,重点研究室温与500℃时该阻燃层对基体力学性能的影响以及残余应力变化规律。结果表明:Ti40Zr25Be20阻燃改性层主要由Ti、Zr非晶相组成;阻燃层与钛合金基体之间形成微冶金结合;阻燃改性层中存在残余拉应力,其大小在25~35MPa之间;阻燃改性层在500℃条件下,对基体的抗拉性能无显著影响,对基体扭曲强度的影响约1.3%。In recent years,titanium materials play an important role on the design and fabricating of significant components of these engines,and the problem of“titanium fire”becomes a great topic for the study of aeroengines.Amorphous Ti 40 Zr 25 Be 20 coating was prepared on the titanium alloys by micro pulse plasma surface treatment,which was considered as the burn-resistant layer.The effect of the coating on the mechanical properties of the substrate was studied and compared while the temperature was at room temperature and 500℃,respectively.The residual stress was analyzed as well.These experimental data could support the engineering applications for such technologies.The result showed that Ti 40 Zr 25 Be 20 was composed of amorphous Ti and Zr,the interface between the substrate and the coating was metallurgical bonded.The residual stress was within 25~35 MPa.When the burn-resistant coating was under 500℃,the tensile properties of the substrate was not affected,in contrast,the effect on the twist strength was 1.3%.

关 键 词：钛合金 阻燃改性层 非晶结构 力学性能 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]