| 常压高速气雾喷射淬火表面换热系数 |
| |
| 引用本文： | 丁冬芳,邵宝东,程赫明,李建云,李自良,侯立军,侯杰,王丽凤,田翀. 常压高速气雾喷射淬火表面换热系数[J]. 辽宁工程技术大学学报(自然科学版), 2011, 30(3): 472-475. DOI: CNKI：21-1379/N.20110603.0016.003 |
| |
| 作者姓名： | 丁冬芳 邵宝东 程赫明 李建云 李自良 侯立军 侯杰 王丽凤 田翀 |
| |
| 作者单位： | 昆明理工大学建筑工程学院,云南昆明,650093 |
| |
| 基金项目： | 云南省应用基础研究重点基金资助项目(2007A0015Z); 云南省教育厅科学研究基金资助项目(2010Y382) |
| |
| 摘 要： | 针对淬火过程中试件与淬火介质间的表面换热系数难于测量的问题,采用反传热求解方法,根据实验测定的试件表面的冷却曲线,通过非线性估计法和有限差分法计算表面换热系数随试件温度的变化规律。计算结果表明:氮气-雾化水混合物的冷却能力与水淬或油淬差不多。在氮气-雾化水混合物喷射淬火过程中,开始时的表面换热系数趋于平稳,在Ms点(170℃)附近,表面换热系数明显增加。马氏体相变过程中,相变潜热用于增加相变驱动力,从而克服相变阻力,完成马氏体相变。
|
| 关 键 词： | 氮气-雾化水混合物 气体淬火 表面换热系数 数值计算 马氏体相变 |
Surface heat transfer coefficient of nitrogen-spray water eject quenching under normal pressure and high velocity |
| |
| DING Dongfang,SHAO Baodong,CHENG Heming,LI Jianyun,LI Ziliang,HOU Lijun,HOU Jie,WANG Lifeng,TIAN Chong. Surface heat transfer coefficient of nitrogen-spray water eject quenching under normal pressure and high velocity[J]. Journal of Liaoning Technical University (Natural Science Edition), 2011, 30(3): 472-475. DOI: CNKI：21-1379/N.20110603.0016.003 |
| |
| Authors: | DING Dongfang SHAO Baodong CHENG Heming LI Jianyun LI Ziliang HOU Lijun HOU Jie WANG Lifeng TIAN Chong |
| |
| Affiliation: | DING Dongfang,SHAO Baodong,CHENG Heming,LI Jianyun,LI Ziliang,HOU Lijun,HOU Jie,WANG Lifeng,TIAN Chong(Faculty of Civil and Architectural Engineering,Kunming University of Science and Technology,Kunming 650093,China) |
| |
| Abstract: | The surface heat transfer coefficient is difficult to measure during quenching process.According to the cooling curve of surface and centre of specimen measured experimentally,the variations of surface heat transfer coefficient and specimen temperature were calculated by nonlinear estimate methods and finite difference method based on inverse heat transfer method.The results show that the cooling performance of mixture of Nitrogen and spray water is the same as that of water or oil.During quenching,the surf... |
| |
| Keywords: | nitrogen-spray water mixture gas quenching surface heat transfer coefficient numerical calculation Martensite phase transformation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
