常颖,李树娟,唐行辉,李晓东,王存宇,赵坤民

• 1:大连理工大学工业装备结构分析重点实验室
• 2:大连理工大学汽车工程学院
• 3:钢铁研究总院特殊钢研究所

摘要(Abstract)：

为了探究冲压压强和样件表面粗糙度对22MnB5钢板的界面换热系数(Interfacial heat transfer coefficient,以下简称IHTC)的影响,自主设计了圆台试验模型,利用Beck非线性估算法,求解热成形工艺中高温样件与低温模具间界面换热系数。实验中通过调整冲压压强和改变样件表面粗糙度的方式,进而改变模具与样件间接触表面微观形貌,探究其对IHTC的影响。研究表明:压强与IHTC存在高度近似的正幂函数关系;粗糙度也会对IHTC产生影响,并且当粗糙度大于1μm时,IHTC值会随粗糙度的增大而明显减小,当粗糙度小于1μm时,由于表面氧化皮的影响,IHTC将随粗糙度值的减小而增大放缓,甚至趋于定值而不再增加。

关键词(KeyWords)： 表面微观形貌;界面换热系数(IHTC);Beck非线性估算法;粗糙度;压强

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101036,51201093,11472072);; 辽宁省自然科学基金(优秀人才培养,2014028001)

作者(Author): 常颖,李树娟,唐行辉,李晓东,王存宇,赵坤民

DOI: 10.13289/j.issn.1009-6264.2015.03.041

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