K4169高温合金组织细化研究

熊玉华; 杨爱民; 李培杰; 刘林

PDF(245 KB)

航空材料学报 ›› 2001, Vol. 21 ›› Issue (3) : 24-28.

扫码查看或转发全文

论文

K4169高温合金组织细化研究

作者信息 +

Investigation on grain structure refinement of superalloy K4169

Author information +

文章历史 +

摘要

研究了K4169高温合金在不同浇注温度及向熔体中加入细化剂时的晶粒组织。结果表明,降低浇注温度可以明显细化凝固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℃和1420℃下,并对合金熔体进行均匀化处理时,加入所研制的复合细化剂可使圆柱锭的晶粒分别细化至ASTM1.7级和ASTMM10.5级;断面等轴晶的比例分别达96%和90%以上。本文提出了晶粒细化的机理并分析了晶粒细化后断面等轴晶比例增大的现象

Abstract

Grain structures of cast superalloy K4169 were investigated at different pouring temperature and with the addition of mixed refiner. It is found that lowering pouring temperature can lead to grain refinement of matrix and improve the proportion of equiaxed grains at traverse cross-section. While adding mixed refiner and with the melt homogeneous treatment, at a conventional pouring temperature of 1400℃ and 1420℃, the average equiaxed grains could be refined to the order of ASTM 1.7 and ASTM M10.5, respectively In addition, the proportion of equiaxed grains at traverse cross-section could be increased to 96% and 90%, respectively Furthermore, the mechanisms of grain refinement were proposed and the phenomenon that P was improved after grain refinement was analyzed

导出引用

熊玉华, 杨爱民, 李培杰, 刘林. K4169高温合金组织细化研究[J]. 航空材料学报, 2001, 21(3): 24-28

XIONG Yu-hua, YANG Ai-min, LI Pei-jie, LIU Lin. Investigation on grain structure refinement of superalloy K4169[J]. Journal of Aeronautical Materials, 2001, 21(3): 24-28

参考文献

EWING B A, GREEN K A. Polycrystalline grain controlled castings for rotating compressor and turbine components[A]. Superalloys 1984. The Metallurgical Society of AIME, 1984:33-42.
NAZMY M, WEISS B, STICKLER R. The effect of advanced fine grain casting technology on the static and cyclic properties of IN713LC [A]. High Temperature Materials for Power Engineering 1990 II. The Netherlands:Kluwer Academic Publishers, 1990:1397-1404.
MONDOLF L F. Grain refinement in the casting of non-ferrous alloys [A]. Grain Refinement in Casting and Welds. Edited by ABBASCHIAN G J and DAVID S A. The Metallurgical Society of AIME, 1983:3-50.
CHANG E, T SENG B, CHOU J C, YIN V. Processing, structure and mechanical property of investment cast IN-713LC Superalloy [J]. AFS Trans, 1988, 96:47-54..
熊玉华. K4169高温合金化学法晶粒细化工艺及机理的研究 [D]. 西安西北工业大学 2000.
熊玉华,柳伟,杨爱民,等. Ni-Al-Ti细化剂对K4169高温合金铸态组织及性能的影响[J]. 金属学报, 1999, 7:689-692.
金属平均晶粒度测定法,GB6394-86,716-730.
BRAMFITT B L. The effect of carbide and nitride additions on the heterogeneous nucleation behavior of liquid iron[S]. Metal Trans, 1970; 1:1987-1995.
HUNT J D. Steady state columnar and equiaxed growth of dendrites and eutectic[S]. Mater Sci Eng, 1984, 65:75-84.
李殿中,苏仕方,徐雪华,等. 镍基合金叶片凝固过程微观组织模拟及工艺优化研究[J].铸造, 1997, 8:1-7.