通过试验实测冷作模具钢SDC99的低温参数,结合沸腾换热经验模型求解沸腾换热系数,建立有限元数值分析模型,对SDC99冷作模具钢试件深冷处理过程进行数值模拟.研究表明,试件心部和表面的冷却状况差异较大,尤其是温度和冷却速度.然而,这种温度和冷却速度的剧烈变化主要集中于从试件表面至内部的1/3厚度内,而在试件心部温度和冷却速度变化比较平缓.模拟结果与试验实测数据比较吻合,最大相对偏差为10.58％,这说明采用数值分析方法能较好的再现试件在深冷处理过程中的动态温度场变化规律,为后续组织性能评估以及深冷处理工艺的制定提供依据.
参考文献
| [1] | 黎文献,龚浩然,柏振海,陈鼎.金属材料的深冷处理[J].材料导报,2000(03):16-18. |
| [2] | 邱庆忠.深冷处理技术在金属材料中的应用[J].材料研究与应用,2007(02):150-153. |
| [3] | Owaku S .Cryogenic treatment[J].Hearing Treatment,1981,21(01):44-48. |
| [4] | D.N. COLLINS .Deep Cryogenic Treatment of Tool Steels: a Review[J].Heat Treatment of Metals,1995(2):40-42. |
| [5] | Dennis J. Kamody .Using deep cryogenics to advantage[J].Advanced Materials & Processes,1998(4):215-218. |
| [6] | Nirmal S. Kalsi;Rakesh Sehgal;Vishal S. Sharma .Cryogenic Treatment of Tool Materials: A Review[J].Materials and Manufacturing Processes,2010(10/12):1077-1100. |
| [7] | A. Molinari;M. Pellizzari;S. Gialanella .Effect of deep cryogenic treatment on the mechanical properties of tool steels[J].Journal of Materials Processing Technology,2001(1/3):350-355. |
| [8] | P.M. Bravo;J.M. Alegre;M. Preciado .Effect of low temperature tempering prior cryogenic treatment on carburized steels[J].Journal of Materials Processing Technology,2006(1/3):41-44. |
| [9] | Paolo Baldissera;Cristiana Delprete .Effects Of Deep Cryogenic Treatment On Static Mechanical Properties Of 18nicrmo5 Carburized Steel[J].Materials & design,2009(5):1435-1440. |
| [10] | Westwater J W;Hwalek J J;Iriving M E .Suggested standard method for obtaining boiling curves by quenching[J].Industrial and Engineering Chemistry Fundamentals,1986,25(04):685-692. |
| [11] | Barron R F.Crygenic Heat Transfer[M].Philadelphia:Taylor & Francis,1999 |
| [12] | Ozisik M N;Orlande H R B.Inverse Heat Transfer Fundamentals and Application[M].New York:Taylor & Francis,2000 |
| [13] | Jin T;Hong J P;Zheng H et al.Measurement of boiling heat transfer coefficient in liquid nitrogen bath by inverse heat conduction method[J].Journal of Zhejiang Univeristy Science A,2009,10(05):691-696. |
| [14] | 徐济鋆.沸腾传热和气液两相流[M].北京:原子能出版社,1993 |
| [15] | Bromley L A .Heat transfer in stable film boiling[J].Chemical Engineering Progress,1950,46(02):221-227. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%