Heat Transfer Model of Ring Forgings with Cracks Based on Transient Heat Transfer

被引：1
|
作者：
Zhang Y. [1 ]
Tian M. [1 ]
Li Y. [1 ]
机构：
[1] School of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, Hebei
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2018年 / 29卷 / 10期
关键词：
Crack defect; Hot ring forgings; Thermal balance; Transient heat transfer model;
D O I：
10.3969/j.issn.1004-132X.2018.10.017
中图分类号：
学科分类号：
摘要：
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. © 2018, China Mechanical Engineering Magazine Office. All right reserved.
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页码：1240 / 1247
页数：7
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