固溶处理对新型镍基高温合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2022.03.021

金属热处理 ›› 2022, Vol. 47 ›› Issue (3): 107-112.DOI: 10.13251/j.issn.0254-6051.2022.03.021

固溶处理对新型镍基高温合金组织及性能的影响

程体娟^1,2, 甘斌^1,2, 于鸿垚^1,2, 周海晶^1,2, 郭彩玉^1,2, 毕中南^1,3, 杜金辉^2,3

1.钢铁研究总院高温材料研究所, 北京 100081;
2.高温合金新材料北京市重点实验室, 北京 100081;
3.北京钢研高纳科技股份有限公司, 北京 100081

收稿日期:2021-11-15 修回日期:2022-01-17 出版日期:2022-03-25 发布日期:2022-04-22
通讯作者: 甘斌, 高级工程师,博士,E-mail: ganbin@cisri-gaona.com.cn
作者简介:程体娟(1997—),女,硕士研究生,主要研究方向为新型镍基高温合金的组织及力学性能,E-mail:chengtijuan@126.com。
基金资助:
国家重点研发计划(2017YFA0700703);国家自然科学基金(92060102)

Effect of solution treatment on structure and properties of a novel nickel-based superalloy

Cheng Tijuan^1,2, Gan Bin^1,2, Yu Hongyao^1,2, Zhou Haijing^1,2, Guo Caiyu^1,2, Bi Zhongnan^1,3, Du Jinhui^2,3

1. High Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China;
2. Beijing Key Laboratory of Advanced High Temperature Materials, Beijing 100081, China;
3. Beijing CISRI-GAONA Materials and Technology Co., Ltd., Beijing 100081, China

Received:2021-11-15 Revised:2022-01-17 Online:2022-03-25 Published:2022-04-22

摘要/Abstract

摘要： 采用OM、SEM、DSC和硬度计等方法研究了在1080 ℃下不同固溶时间及冷却方式对新型镍基高温合金中γ′相和硬度值的影响。结果表明,在空冷和水冷条件下,试验合金中的γ′相尺寸均随着固溶时间的延长而减小;同一固溶时间下,相较于水冷试样,空冷试样中的γ′相尺寸更大,硬度值也更高。这是因为在水冷条件下,冷速较高,过冷度大,降低了基体中原子的扩散速率,减缓了γ′相的长大,使其最终尺寸较小。因此,固溶时间应小于16 h,冷却方式宜选择空冷,此时该合金中的γ′相分布均匀,尺寸大于20 nm,合金硬度值高于425 HV0.2。

关键词: 镍基高温合金, 固溶处理, 冷却方式, γ′相, 硬度

Abstract: Effects of different solution time and cooling methods on the γ′ phase and hardness in a novel nickel-based superalloy at 1080 ℃ were studied by means of OM, SEM, DSC and hardness tester. The results show that with the prolongation of the solution time, the size of γ′ phase in the tested alloy decreases under both air-cooling and water-cooling conditions; When the solution time is the same, the size of γ′ phase in the air-cooled specimen is larger than that of the water-cooled specimen, and the hardness value is also higher. This is because under the condition of water cooling, the cooling rate is higher and the degree of supercooling is larger, which reduces the diffusion rate of atoms in the matrix, slowes down the growth of the γ′ phase, and makes the final size smaller. Therefore, the solution time should be less than 16 h, and the cooling method should be air cooling, by which the γ′ phase in the alloy is uniformly distributed, the size is greater than 20 nm, and hardness value of the alloy is higher than 425 HV0.2.

Key words: nickel-based super alloy, solution treatment, cooling method, γ′ phase, hardness

中图分类号:

TG156.1

程体娟, 甘斌, 于鸿垚, 周海晶, 郭彩玉, 毕中南, 杜金辉. 固溶处理对新型镍基高温合金组织及性能的影响[J]. 金属热处理, 2022, 47(3): 107-112.

Cheng Tijuan, Gan Bin, Yu Hongyao, Zhou Haijing, Guo Caiyu, Bi Zhongnan, Du Jinhui. Effect of solution treatment on structure and properties of a novel nickel-based superalloy[J]. Heat Treatment of Metals, 2022, 47(3): 107-112.

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固溶处理对新型镍基高温合金组织及性能的影响

Effect of solution treatment on structure and properties of a novel nickel-based superalloy

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