摘要
在钛合金产品高温成形过程中,表面会吸附大气氛围中的氧、氮、氢,形成包括富氧α层、氧化层以及防护涂料在内的污染层。污染层会降低材料的抗拉强度、断后伸长率等力学性能,缩短产品的使用寿命。本文利用菲克第二定律对TA15合金在860~950℃下的富氧α层厚度进行研究,并利用恒定温度下求解方法,解得氧元素在TA15合金内扩散的激活能Q为211897.4J/mol,并求得其扩散曲线。最后,提出利用面积求解TA15合金在工艺状态下富氧α层厚度的方法,为后续研究提供思路。
During the high-temperature forming process of titanium alloy products,the surface will adsorb oxygen,nitrogen,and hydrogen from the atmosphere,forming rich oxygen a contamination layers including layers,oxide layers,and protective coatings.The pollution layer will reduce the tensile strength,elongation after fracture,and other mechanical properties of the material,shortening the service life of the product.This article utilizes Fick's second law to investigate the oxygen richαlayer of TA15 titanium alloy at 860~950C.By solving at constant temperature,the activation energy of oxygen diffusion was determined to be 211897.4J/mol,and the diffusion curve was obtained.Finally,this article proposes to use area to solve the oxygen enrichment problem of TA15 titanium alloy in the process state.This method was suposed to provide ideas for subsequent research.
作者
刘吉琛
刘伟
李保永
廖子颖
丁科迪
何慧敏
Liu Jichen;Liu Wei;Li Baoyong;Liao Ziying;Ding Kedi;He Huimin(Beijing Hangxing Machine Manufacturing Co.,Ltd.,Beijing 100013)
出处
《航天制造技术》
2023年第6期23-29,共7页
Aerospace Manufacturing Technology
关键词
TA15
钛合金
富氧α层
菲克第二定律
变温扩散
TA15
titanium alloy
oxygen enrichment α layer
Fick's second law
temperature dependent diffusion
