全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
金属学报  2015 

镍基高温合金铸件液态金属冷却定向凝固建模仿真及工艺规律研究

DOI: 10.11900/0412.1961.2015.00338, PP. 1288-1296

Keywords: 液态金属冷却,数学模型,定向凝固,数值模拟

Full-Text   Cite this paper   Add to My Lib

Abstract:

考虑了液态金属冷却定向凝固过程中动态对流边界,建立了高温合金铸件温度场数学模型,采用三维元胞自动机(cellularautomaton,CA)方法和KGT生长模型,建立了镍基高温合金凝固过程晶粒形核及生长的数学模型.采用宏观模型与微观模型双向同步耦合,实现了温度场和晶粒组织的数值模拟.进行了浇注实验,用冷却曲线和晶粒形貌验证了数学模型的准确性.对液态金属冷却定向凝固规律的研究表明,抽拉速率不仅对糊状区形状有重要影响,而且对晶粒的平行度以及枝晶组织的细密性也有很大的影响.抽拉速率过小时,糊状区上凸,晶粒组织易发散;抽拉速率过大时,糊状区下凹,晶粒组织汇聚,同时造成枝晶组织的粗化;适当的抽拉速率下能获得平坦的糊状区,提高晶粒的平行度,细化枝晶组织.

References

[1]  Nabarro F R. Mater Sci Eng, 1994; A184: 167
[2]  Huang Q Y,Li H K. Superalloys. Beijing: Metallurgical Industry Press, 2000: 4 (黄乾尧,李汉康. 高温合金. 北京: 冶金工业出版社, 2000: 4)
[3]  Guo R F, Liu L, Li Y F, Zhao X B, Zhang J, Fu H Z. Foundry, 2014; 63: 145 (郭如峰, 刘 林, 李亚峰, 赵新宝, 张 军, 傅恒志. 铸造, 2014; 63: 145)
[4]  Bridgman P W. US Pat, 88650, 1926
[5]  Tang N, Wang Y L, Xu Q Y, Zhao X H, Liu B C. Acta Metall Sin, 2015; 51: 499 (唐 宁, 王艳丽, 许庆彦, 赵希宏, 柳百成. 金属学报, 2015; 51: 499)
[6]  Pan D, Xu Q Y, Yu J, Liu B C, Li J R, Yuan H L, Jin H P. Int J Cast Met Res, 2008; 21: 308
[7]  Liu L, Zhang J, Shen J, Huang T W, Fu H Z. Mater China, 2010; 29(7): 1 (刘 林, 张 军, 沈 军, 黄太文, 傅恒志. 中国材料进展, 2010; 29(7): 1)
[8]  Pan D, Xu Q Y, Liu B C, Li J R, Yuan H L, Jin H P. JOM, 2010; 62(5): 30
[9]  Tang N, Xu Q Y, Liu B C. Spec Casting Nonferrous Alloy, 2011; 31: 1028 (唐 宁, 许庆彦, 柳百成. 特种铸造及有色合金, 2011; 31: 1028)
[10]  Tang N, Xu Q Y, Liu B C. Foundry Technol, 2012; 33: 558 (唐 宁, 许庆彦, 柳百成. 铸造技术, 2012; 33: 558)
[11]  Rzyankina E, Szeliga D, Mahomed N, Nowotnik A. Appl Mech Mater, 2013; 372: 54
[12]  Seth B B. In: Pollock T M, Kissinger R D, Bowman R R, Green K A, McLean M, Olson S L, Schirra J J eds., Superalloys 2000, Warrendale, PA: TMS, 2000: 16
[13]  Singer R F. In: Coutsouradis D, Davidson J H, Ewald J, Greenfield P, Khan T, Malik M, Meadowcroft D B, RegisV, Scarlin R B, Schubert F, Thornton D V eds., Materials for Advanced Power Engineering. Dordrecht, Netherlands: Kluwer Academic Publishers Group, 1994: 1707
[14]  Lund C H, Hockin J. In: Sims C T, Hagel W C eds., Superalloys 1972, New York: John Wiley & Sons, 1972: 403
[15]  Kermanpur A, Rappaz M, Varahram N, Davami P. Metall Mater Trans, 2000; 31B: 1293
[16]  Konter M, Kats E, Hofmann N. In: Pollock T M, Kissinger R D, Bowman R R, Green K A, McLean M, Olson S L, Schirra J J eds., Superalloys 2000, Warrendale, PA: TMS, 2000: 189
[17]  Nakagawa Y G, Ohotomo Y, Saiga Y. In: Tien J K, Wlodek S T, Morrow H I, Gell M, Mauer G E eds., Superalloys 1980, Metals Park, OH: American Society for Metals, 1980: 267
[18]  Graham L D, Rauguth B L. US Pat, 6443213, 2002
[19]  Tschinkel J G, Giamei A F, Kearn B H. US Pat, 3763926, 1973
[20]  Giamei A F, Tschinkel J G. Metall Trans, 1976; 7A: 1427
[21]  Elliott A J, Karney G B, Pollock T M. In: Green K A, Pollock T M, Harada H, Howson T E, Reed R C, Schirra J J, Walston S eds., Superalloys 2004, Warrendale, PA: TMS, 2004: 421
[22]  Liu J H, Liu L, Huang T W, Ge B M, Zhang J, Fu H Z, Yu B, Su G Q. Foundry, 2010; 59: 822 (刘金洪, 刘 林, 黄太文, 葛丙明, 张 军, 傅恒志, 于 波, 苏贵桥. 铸造, 2010; 59: 822)
[23]  Elliott A J, Tin S, King W T, Huang S C, Pollock T M. Metall Mater Trans, 2004; 35A: 3221
[24]  Kermanpur A, Varahram N, Davami P. Metall Mater Trans, 2000; 31B: 1293
[25]  Miller J D, Yuan L, Lee P D, Pollock T M. Acta Mater, 2014; 69: 47
[26]  Lu Y Z, Xi H J, Shen J, Zheng W, Xie G, Lou L H, Zhang J. Acta Metall Sin, 2015; 51: 603 (卢玉章, 席会杰, 申 健, 郑 伟, 谢 光, 楼琅洪, 张 健. 金属学报, 2015; 51: 603)
[27]  Tang N, Yan X W, Xu Q Y, Liu B C. Foundry, 2014; 63: 347 (唐 宁, 闫学伟, 许庆彦, 柳百成. 铸造, 2014; 63: 347)
[28]  Rappaz M, Gandin C A. Acta Metall Mater, 1993; 41: 345
[29]  Nastac L. Acta Mater, 1999; 47: 4253
[30]  Thevoz P, Desbiolles J L, Rappaz M. Metall Trans, 1989; 20A: 311
[31]  Kurz W, Giovanola B, Trivedi R. Acta Metall, 1986; 34: 823
[32]  Wang W, Lee P D, McLean M. Acta Mater, 2003; 51: 2971
[33]  Tang N, Sun C B, Zhang H, Xu Q Y, Liu B C. Rare Met Mater Eng, 2013; 42: 2298 (唐 宁, 孙长波, 张 航, 许庆彦, 柳百成. 稀有金属材料与工程, 2013; 42: 2298)
[34]  Ren W P, Li Q, Xiao C B, Song J X, He L M, Huang G H, Cao C X. J Mater Eng, 2014; (6): 74 (任维鹏, 李 青, 肖程波, 宋尽霞, 何利民, 黄光宏, 曹春晓. 材料工程, 2014; (6): 74)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133