钛合金熔模铸造型壳焙烧温度场数值模拟
Numerical Simulation of Sintering Temperature Field in Titanium Alloy Investment Casting Shell
金煜俊 1李宁 1廖敦明 1陈宇豪 1尹昊 1郄喜望2
作者信息
- 1. 华中科技大学材料科学与工程学院,材料成形与模具技术全国重点实验室,武汉 430074
- 2. 中国航发北京航空材料研究院,北京 100094
- 折叠
摘要
对钛合金熔模铸造用型壳材料的传热系数、密度及比热容进行了测量,为型壳焙烧温度场的数值模拟提供了参数支撑;将传统凝固降温理论逆向转化,开发了熔模铸造型壳焙烧求解器,建立了型壳高温焙烧过程的升温模型,实现了对型壳焙烧过程升温与降温过程的模拟.基于铸件的几何模型,实现了型壳几何模型自动生成,并以钛合金铸造用复杂薄壁骨架型壳为研究对象,对其焙烧过程的温度变化规律进行了模拟分析.结果表明,建立的型壳焙烧模型能较好描述其焙烧温度的变化规律.
Abstract
The thermal conductivity,density and specific heat capacity of shell for titanium alloy investment casting were measured,providing parameter support for numerical simulation of shell baking temperature field.A reverse trans-formation of traditional solidification cooling theory was carried out to develop a solution for investment casting shell baking,and a heating model for high-temperature baking process of the shell was established to simulate the heating and cooling processes of baking process.Based on geometric modeling of casting,the automatic generation of shell geo-metric modeling was realized.Taking the complex thin-walled skeleton shell for titanium alloy casting as object,the temperature variation law of baking process was simulated and analyzed.The results indicate that the established shell baking model gives a better description of the variation law of baking temperature.
关键词
钛合金/熔模铸造/型壳焙烧/温度场/数值模拟Key words
Titanium Alloy/Investment Casting/Shell Sintering/Temperature Field/Numerical Simulation引用本文复制引用
基金项目
国家重点研发计划资助项目(2020YFB2008300-2)
出版年
2024
NETL
NSTL
万方数据