超高强度钢热成形过程中的接触热阻

Thermal contact resistance in hot forming of ultra-high strength steel

接触热阻作为超高强度钢热成形过程中重要的参数之一,其取值直接影响相关数值模拟结果的准确度。该文在参阅大量文献的基础上,对接触热阻的传热机理进行综合评述;分析了热成形过程中压力、温度等因素对接触热阻的影响;介绍了国内外研究的若干理论模型。对已报道的科研工作进行了总结,提出了今后的研究方向。

As one of the most important parameters in hot forming process of ultra-high strength steel,thermal contact resistance has an obvious effect on the accuracy of the simulation results,and recently becomes a hot issue in the research area of hot forming.In this paper,the heat-transfer mechanism of the contact thermal resistance are reviewed comprehensively based on a lot of documents and data.The influence factors such as pressure and temperature in hot forming process are analyzed.And then,the theoretical models at home and abroad are presented.After the summary of the reported studies,the future research direction is pointed out.