以Ansys 10.0和Fluent 6.3为计算平台, 利用2者之间的接口和Fluent 6.3软件提供的用户自定义函数功能, 研究了辊芯初预热温度、拉坯速度、预热和补热功率等因素对石墨铸型连续铸造复合成型法制备高速钢复合轧辊坯内非稳态温度场的影响,并对各工艺参数之间的匹配关系进行了探讨. 结果表明, 当辊芯表面的终预热温度一定时,所需的感应预热功率随拉坯速度的增加而增大, 随初预热温度的升高而减小;辊芯移出线圈时, 高温区仅限于表层附近, 芯内大部分区域几乎不受感应预热的影响.进入预热坩埚后, 随着辊芯的下移, 辊芯表面能达到的最高温度及在固相线温度以上持续的时间随补热功率的增大和拉坯速度的减小而相应升高或增长; 拉坯速度和补热功率之间存在严格的匹配关系, 当2者匹配得当时, 辊芯和外层高速钢之间可形成牢固的冶金结合.
The effects of original preheating temperature of core, casting speed, preheating power and supplement heat power on unsteady state temperature field in high speed steel composite roll billet and the parameters match relationship during graphite mould continuous pouring process for cladding have been numerically simulated by use of interface and user–defined functions based on Ansys 10.0 and Fluent 6.3 software. The results indicate that the required induced preheating power increases with increasing casting speed and decreasing original preheating temperature of core when the finishing preheating temperature of core–surface is constant. The higher temperature zone only lies in the surface layer of core and the temperature in mostly zone of core is not affected by inducing coil when the core moves off the preheating coil. The highest temperature of core–surface and duration above its solidus increase with increasing supplement heating power and decreasing casting speed. When the casting speed matched with supplement heat power, the high speed steel can tightly bond with core to form the composite roll.
[1] Kang Y J, Oh J C, Lee H C, Xiao Q Y, Shao K Z. Metall Mater Trans, 2001; 32A: 2515
[2] Twadoh S, Mori T. ISIJ Int, 1992; 32: 1131
[3] Kudo T, Kawashima S, Kurahashi R. ISIJ Int, 1992; 32: 1190
[4] Ichino K, Kataaoka Y, Koseki T. Kawasaki Steel Technol Rep, 1997; 37(8): 13
[5] Hashimoto M, Otomo S, Yoshida K, Hokimoto K, Oda T. ISIJ Int, 1992; 32: 1202
[6] Shimizu M, Shitamura O, Matsuo S. ISIJ Int, 1992; 32: 1244
[7] Fu H G. Iron Steel, 2000; 35(5): 67
(符寒光. 钢铁, 2000; 35(5): 67)
[8] Zhou L, He J A. Foundry, 2002; 51: 666
(周利, 何奖爱. 铸造, 2002; 51: 666)
[9] Gong K L. Steel Roll, 2008; 25(2): 39
(宫开令. 轧钢, 2008; 25(2): 39)
[10] Shao K Z, Wei S Z, Long R, Liu Y M, Wang S C. Foundry, 2006; 55: 160
(邵抗振, 魏世忠, 龙锐, 刘亚民, 王守城. 铸造, 2006; 55: 160)
[11] Wu C J, Shen D Z, Yang G M, Jia T C, Huang Y X. Iron Steel, 1999; 34(4): 61
(吴春京, 沈定钊, 杨国明, 贾天聪, 黄永溪. 钢铁, 1999; 34(4): 61)
[12] Zhou L Y, Chen B Q, Du X M, Wang H. Spec Cast Nonferrous Alloys, 2009; 29: 621
(周利阳, 陈冰泉, 杜学铭, 万虹. 特种铸造及有色合金, 2009; 29: 621)
[13] Feng M J, Wang E G, Wang J G, He J C. Northeast Univ (Nat Sci), 2007; 28: 1401
(冯明杰, 王恩刚, 王俊刚, 赫冀成. 东北大学学报(自然科学版), 2007; 28: 1401)
[14] Han Z C. Electromagnetic Technique and Equipment of Metallurgy. Beijing: Metallurgical Industry Press, 2008: 19
(韩至成. 电磁冶金技术及装备. 北京: 冶金工业出版社, 2008: 19)
