TC17钛合金加热过程中的有限元模型  

The FEM Model of Heating Process for TC17 Titanium Alloy

作　　者：何俊 惠瑞拓 曾卫东[2] 徐建伟[2] 陈威 He Jun;Hui Ruituo;Zeng Weidong;Xu Jianwei;Chen Wei(AECC Aviation Power Co.,Ltd.,Xi’an 710021,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国航发动力股份有限公司,陕西西安710021 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《钛工业进展》2019年第2期8-11,共4页Titanium Industry Progress

基　　金：国家重点研发计划项目(2016YFB0301203)

摘　　要：采用深埋热电偶动态测量温度变化并结合有限元模拟建立了TC17钛合金棒材的加热模型,并对其升温过程进行了模拟。结果表明:总换热系数由辐射换热系数和对流换热系数组成,可通过数学运算获得,其数值与棒材温度有关,随着棒材温度的升高,总换热系数呈增大趋势。通过对Ф500mm×500mmTC17钛合金棒材的升温过程进行有限元模拟,获得棒材心部和1/2R处的温升曲线,经过与热电偶测得的实际温升曲线对比,两者有较高的吻合度,棒材心部和1/2R处到温时间分别为196min和166min。采用小尺寸试样进行β单相区加热试验,通过与大尺寸棒材β晶粒尺寸的比较,验证了有限元模型的准确性。The heating model of TC17 titanium alloy was established by dynamic measurement of temperature for the bar with deep buried thermocouple coupled with finite element simulation and the heating process was simulated.The results show that the total heat transfer coefficient is composed of radiation heat transfer coefficient and convection heat transfer coefficient,which can be obtained by mathematical calculation.The value of total heat transfer coefficient is related to the bar temperature and increases with the bar temperature.The temperature rise curves at the center and 1/2 radius of the bar were obtained after the simulation of bar with dimensions ofФ500 mm×500 mm.The simulation curves are in good agreement with the measured curves compared with the actual temperature rise curves measured by thermocouples.Time required to reach the set temperature at the center and 1/2 radius of the bar was 196 min and 166 min respectively.The heating test with small-size sample was done inβzone.It shows that the accuracy of the finite element model is verified by comparing the beta grain sizes of large-sized bars.

关 键 词：TC17钛合金 加热 有限元模拟 晶粒尺寸 

分 类 号：TG146.23[一般工业技术—材料科学与工程]