[1]撒世鹏,杨文超,秦嘉润,等.叶片排列方式对一种第四代单晶高温合金叶片杂晶影响的数值模拟研究[J].中国材料进展,2024,43(10):871-878.[doi:10.7502/j.issn.1674-3962.202309002]
　SA Shipeng,YANG Wenchao,QIN Jiarun,et al.Numerical Simulation of Blade Arrangement on Stray Grains in a Fourth-Generation Single Crystal Superalloy Blade[J].MATERIALS CHINA,2024,43(10):871-878.[doi:10.7502/j.issn.1674-3962.202309002]
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叶片排列方式对一种第四代单晶高温合金叶片杂晶影响的数值模拟研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
43
期数:
2024年第10期
页码:
871-878
栏目:
出版日期:
2024-10-30

文章信息/Info

Title:
Numerical Simulation of Blade Arrangement on Stray Grains in a Fourth-Generation Single Crystal Superalloy Blade
文章编号:
1674-3962(2024)10-0871-08
作者:
撒世鹏; 杨文超; 秦嘉润; 张军; 刘林
西北工业大学 凝固技术国家重点实验室，西安 710072
Author(s):
SA Shipeng; YANG Wenchao; QIN Jiarun; ZHANG Jun; LIU Lin
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
关键词:
高温合金; 单晶叶片; 杂晶; 定向凝固; 数值模拟
Keywords:
superalloy;  single crystal blade;  stray grain;  directional solidification;  numerical simulation
分类号:
V232.4；TG132.3
DOI:
10.7502/j.issn.1674-3962.202309002
文献标志码:
A
摘要:
针对组模生产第四代单晶高温合金叶片时由于温度场不均匀导致的缘板杂晶问题，采用有限元模拟软件ProCAST对叶片在组模中以不同方式排列时凝固过程的温度场和晶粒组织进行模拟计算，并且分析了添加引晶杆对杂晶的影响。结果表明，在组模生产时，由于中柱的保温作用小，导致横向温度场不均匀，叶片以0°排列时，缘板边角靠近中柱，其凝固过程中温度下降较快，会在边角形成大的过冷，同时凝固过程的温度梯度较小，枝晶生长慢，杂晶的形成倾向最大。随着排列角度的增加，横向温度场的不均匀性得到改善，但由于第四代合金形核过冷度小，在缘板位置都会有杂晶形成。添加引晶杆可以消除缘板杂晶，但对于叶片以0°排列时，由于叶片进气边靠近中柱，会在引晶杆内产生杂晶。叶片以90°排列时，横向温度场较为均匀，添加的引晶杆内不会产生杂晶，同时组模直径小，可以降低对炉体型腔的尺寸要求，有望成为生产高代次单晶叶片的最优排列方式。
Abstract:
For the problem of stray grain caused by uneven temperature field in the module production of fourth-generation single crystal blades, the finite element simulation software ProCAST was used to simulate the temperature field and grain structure during the solidification process when the blades were arranged in different ways and analyzed the influence of adding crystal guide rod on the stray grain. The results show that transverse temperature field is uneven for the small heat preservation effect of the center pillar in the module production. So when the blades are arranged at 0°, the edge corner of the platform is close to the center pillar, and the temperature drops rapidly during the solidification process, resulting in large undercooling at the edge corner. At the same time, the temperature gradient is small, the dendrites grow slowly, so the formation tendency of stray grain is the largest. With the increase of the angle, the nonuniformity of the transverse temperature field is improved, but due to the low degree of nucleation undercooling of the fourth-generation alloy, there will be stray grain formation at the platform position. The stray grain can be eliminated by adding the crystal guide rod, however when the blades are arranged at 0°, due to the inlet edge of the blades near the center pillar, there will be stray grain in the crystal guide rod. When the blades are arranged at 90°, the transverse temperature field is more uniform, there is no stray grain in the crystal guide rod, and the module diameter is small, which can reduce the size requirements of the furnace body, and is expected to become the optimal arrangement for the production of high-generation single-crystal blades.

备注/Memo

备注/Memo:
收稿日期：2023-09-03修回日期：2023-11-22 基金项目：国家自然科学基金资助项目（52071263，52322410）； 陕西省重点研发计划项目（2023-YBGY-432）；陕西省杰出青年基金资助项目（2021JC-13） 第一作者：撒世鹏，男，1997年生，硕士研究生 通讯作者：杨文超，男，1985年生，教授，博士生导师， Email:wenchaoyang@nwpu.edu.cn
更新日期/Last Update: 2024-09-30