中国机械工程2018，Vol.29Issue(10)：1240-1247,8.DOI:10.3969/j.issn.1004-132X.2018.10.017
基于瞬态传热的含裂缝环形锻件传热模型
Heat Transfer Model of Ring Forgings with Cracks Based on Transient Heat Transfer
摘要
Abstract
A heat transfer model for cracked forgings based on heat transfer theory was proposed to solve the crack problems in hot forgings. Firstly,the model was based on the heat transfer characteristics of micro bodies,and the differential equation of heat conduction was derived,which satisfied the thermal balance relationship of micro elements.The heat transfer coefficient and thermal conductivity were corrected by taking instantaneous heat flux as an intermediary variable. Secondly,the set of natural convection boundary conditions,internal and external environment of ring forgings crack finite space boundary conditions were distinguished,and then the boundary conditions of hot forging ring heat transfer models with crack were established,and the separation variable method was used to solve the heat transfer model. Finally,the finite element software was used to simulate the heat transfer model of annular forgings with different size cracks, and the validity and feasibility of the heat transfer model was verified.关键词
热态环形锻件/瞬态传热模型/裂缝缺陷/热平衡Key words
hot ring forgings/transient heat transfer model/crack defect/thermal balance分类
矿业与冶金引用本文复制引用
张玉存,田孟奇,李亚彬..基于瞬态传热的含裂缝环形锻件传热模型[J].中国机械工程,2018,29(10):1240-1247,8.基金项目
国家自然科学基金资助项目(51675469) （51675469）
