应用分子动力学结合有限元的方法对冷却介质水在45钢淬火过程中的运动状态进行了模拟计算,结果表明试件淬火冷却开始时,与高温45钢表面接触的冷却介质瞬间被汽化,温度迅速升高,高温介质体积膨胀上浮出液态介质将热量散发到环境中,少部分来不及浮出的高温介质将热量传给低温介质.这与现阶段普遍认同的淬火冷却阶段划分理论相一致,而介质温度随时间的变化规律和介质微观运动轨迹进一步表明数值模拟结果与工程实际应用工况基本一致.
Molecular dynamics simulation and finite element methods were employed to study the behaviour of water molecular in the process of quenching of 45 steel. The results show that the contact surfaces between water and 45 steel were boiled momentarily at the beginning of quenching. At the same time, the temperature of water around the sureface of steel part increases quickily. The inflated water with higher temperature rises to surface of the liquid, and the most of heat is emitted to environment and the remains of heat is transfered to the water with lower temperature. The simulation is agree with experimental observation.
参考文献
| [1] | 蒋昱,曾攀,娄路亮.26Cr2Ni4MoV钢淬火过程的三场耦合数值模拟[J].哈尔滨工业大学学报,2002(03):302-307. |
| [2] | Lusquinos, F;Conde, JC;Bonss, S;Riveiro, A;Quintero, F;Cornesana, R;Pou, J .Theoretical and experimental analysis of high power diode laser (HPDL) hardening of AISI 1045 steel[J].Applied Surface Science,2007(4):948-954. |
| [3] | Seong-Hoon Kang;Yong-Taek Im .Finite element investigation of multi-phase transformation within carburized carbon steel[J].Journal of Materials Processing Technology,2007(2/3):241-248. |
| [4] | Li HP;Zhao GQ;Huang CZ;Niu ST .Technological parameters evaluation of gas quenching based on the finite element method[J].Computational Materials Science,2007(2):282-291. |
| [5] | 李强,王葛,陈乃录,廖波,王同珍.淬火介质流场计算机模拟[J].科学通报,2002(24):1861-1862. |
| [6] | 刘娟芳,曾丹苓,刘朝,李勤.水导热系数的分子动力学模拟[J].工程热物理学报,2007(02):196-198. |
| [7] | XIE Jianbin;CHENG Heming;HE Tianchun.[A].北京,2003:175-182. |
| [8] | Heming Cheng;Jianbin Xie;Jianyun Li .Determination of surface heat-transfer coefficients of steel cylinder with phase transformation during gas quenching with high pressures[J].Computational Materials Science,2004(4):453-458. |
| [9] | 李辉平,赵国群,牛山廷,栾贻国.淬火过程冷却曲线的采集及换热系数求解方法的研究[J].金属热处理,2006(07):29-32. |
| [10] | 黄鹏,魏兴钊,董小虹,苏宇辉.金属淬火过程换热面对换热系数影响的有限元探求法[J].热处理技术与装备,2007(03):15-19. |
| [11] | 孔祥谦.有限单元法在传热学中的应用[M].北京:科学出版社,1986 |
| [12] | 谭真;郭广文.工程合金热物性[M].北京:冶金工业出版社,1994 |
| [13] | Jorgensen W L .Transferable intermolecular potential functions for water,alcohols and esters[J].Application to Liquid Water,1981,103(02):335-340. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%