研究了K4169高温合金在各种工艺条件下及向熔体中加入复合细化剂时的晶粒组织.结果表明.降低浇注温度和加入复合细化剂可以明显细化冷凝后基体的晶粒和提高铸件断面等轴晶的比例在通常的浇注温度1400℃下加入复合细化剂.对合金熔体进行或不进行过热处理时.可使圆柱锭的晶粒分别细化至ASTM 1.7级和ASTM 3.2级:断面等轴晶的比例分别达96%和99%以上.当浇注温度为1420 ℃、加入复合细化剂并对合金熔体进行过热处理时,可使圆柱锭晶粒细化至ASTM M10.5级.断面等轴晶的比例达90%以上.提出了晶粒细化的机理并对晶粒细化后断面等轴晶比例增大的现象进行了分析.
参考文献
| [1] | Ewing B A, Green K A. In: Gell M, Kortovich C S,Bricknell R H, Kent W B, Radavich J Feds, Superalloys 1984, Warrendale, PA: The Metallurgical Society of AIME, 1984:33 |
| [2] | Nazmy M, Stickler R, Weiss B. In: Bachelet E, Brunetaud R, Coutsouradis D, Esslinger P, Ewald J, Kverues I, Lindblom Y, Meadowcroft D B, Regis V, Scarlin R B, Schueider K, Singer Reds, High Temperature Materials for Power Engineering 1990 Ⅱ. Dordrecht: Pordrecht Kluwer Academic Publishers, 1990:1397 |
| [3] | Mondolf L F. In: Addacshian G J, David S A eds, Grain Refinement in Casting and Welds. Warrenddle, Pa: The Metallurgical Society of AIME, 1983:3 |
| [4] | Xiong Y H, Liu W, Yang A M, Zhang R, Liu L. Acta Metall Sin, 1999; 7:689(熊玉华.柳伟.杨爱民.张蓉.刘林.金属学报.1999;7:689) |
| [5] | Xiong Y H. Ph D Thesis, Northwestern Polytechnical University, Xi'an: 2000(熊玉华.西北工业大学博士学位论文.西安:2000) |
| [6] | National Standards of the People's Republic of China,GB6394-86(中华人民共和国国家标准GB6394-86) |
| [7] | Cai Y L, Zheng Y R. Study on the Metallography of Superalloys. Beijing: National Defense Industry Press, 1986:88(蔡玉林.郑运荣.高温合金的金相研究.北京:国防工业出版社.1986:88) |
| [8] | Bramfitt B L. Metall Trans, 1970; 1:1987 |
| [9] | Matsuura K, Kudoh M. Mater Sci Eng A, 1997; 239:625 |
| [10] | Hunt J D. Mater Sci Eng, 1984; 65:75 |
| [11] | Li D Z, Su S F, Xu X H, Wang J Q, Chen J Z. Liu Y M.Foundry, 1997; 8:1(李殿中.苏仕方.徐雪华.王君卿.陈家芝.刘一鸣.铸造.1997;8:1) |
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%