热加工与快速凝固对Ni-Co-Al三元合金微观组织演变的影响

doi:10.13251/j.issn.0254-6051.2024.07.036

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 231-240.DOI: 10.13251/j.issn.0254-6051.2024.07.036

热加工与快速凝固对Ni-Co-Al三元合金微观组织演变的影响

李伯奎¹, 周菲², 崔艳娜², 李明³, 周阳², 王俊^2,4

1.江苏华电吴江热电有限公司, 江苏苏州 215221;
2.上海交通大学上海市先进高温材料与精密成形上海市重点实验室, 上海 200240;
3.上海理工大学机械工程学院, 上海 200093;
4.江苏中超航宇精铸科技有限公司, 江苏无锡 214251

收稿日期:2023-11-09 修回日期:2024-03-28 出版日期:2024-07-25 发布日期:2024-08-29
通讯作者: 周阳,副研究员,博士生导师,E-mail: yzhou76@sjtu.edu.cn
作者简介:李伯奎(1974—),男,高级工程师,主要研究方向为热能动力,E-mail: lbk@chd.com.cn。
基金资助:
国家科技部重点研发计划(2021YFB3501004);国家自然科学基金重点项目(52031012);国家自然科学基金青年项目(52001205)

Effects of thermal processing and rapid solidification on the microstructural evolution in Ni-Co-Al ternary alloys

Li Bokui¹, Zhou Fei², Cui Yanna², Li Ming³, Zhou Yang², Wang Jun^2,4

1. Jiangsu Huadian Wujiang Thermal Power Co., Ltd., Suzhou Jiangsu 215221, China;
2. Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China;
3. Mechanical Engineering College, University of Shanghai for Science and Technology, Shanghai 200093, China;
4. Jiangsu Zhongchao Aerospace Precision Casting Technology Co., Ltd., Wuxi Jiangsu 214251, China

Received:2023-11-09 Revised:2024-03-28 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： Ni-Co-Al三元合金因其典型的相变过程以及良好的热加工性能,成为Ni基合金相变与结构、功能应用研究中的重要模型合金。针对Ni基合金功能化应用过程中对微结构单元的尺寸与取向控制要求,研究了不同合金成分、热加工过程以及快速凝固过程对合金的晶粒尺寸、晶粒取向及显微硬度的影响规律。结果表明,电弧熔炼工艺得到的合金铸锭经冷轧-退火处理后,合金晶粒尺寸得到明显细化,平均尺寸约为30 μm;而真空甩带快速凝固得到的合金条带中,其晶粒尺寸进一步降低,约为10 μm。另外,快速凝固过程可以使得合金晶粒取向得到明显改变,由传统加工过程中的{101}取向转变为{100}择优取向,有利于Ni基合金微纳结构单元及有效比表面积的优化控制,有望进一步提高Ni基合金的结构与功能化应用潜力。

关键词: Ni基合金, 晶粒尺寸, 取向, 硬度, 热加工, 快速凝固

Abstract: Due to the typical phase transformation process and good thermal processing performance, Ni-Co-Al ternary alloy has become an important model alloy in the research of phase transformation, structure and function application of Ni-based alloy. Based on the requirements of controlling the size and orientation of microstructure units in the functional applications of Ni-based alloys, the effects of different alloy compositions, thermal processing and rapid solidification processes on the grain size, grain orientation and microhardness of the alloys were investigated. The results show that the grain size of the alloy ingot obtained by arc melting process can be obviously refined after cold rolling-annealing treatment, and the average size is about 30 μm, while the grain size of the alloy strips obtained by rapid solidification process (vacuum melt spinning) can be further reduced to about 10 μm. In addition, the rapid solidification process can significantly change the grain orientation of the alloy, from the {101} orientation in the traditional processing to the preferred {100} orientation, which is conducive to the optimal control of the micro-nano structural unit and effective specific surface area of Ni-based alloys, further improving the structure and functional application potentials of the Ni-based alloys.

Key words: Ni-based alloy, grain size, orientation, hardness, thermal processing, rapid solidification

中图分类号:

TG156.21

李伯奎, 周菲, 崔艳娜, 李明, 周阳, 王俊. 热加工与快速凝固对Ni-Co-Al三元合金微观组织演变的影响[J]. 金属热处理, 2024, 49(7): 231-240.

Li Bokui, Zhou Fei, Cui Yanna, Li Ming, Zhou Yang, Wang Jun. Effects of thermal processing and rapid solidification on the microstructural evolution in Ni-Co-Al ternary alloys[J]. Heat Treatment of Metals, 2024, 49(7): 231-240.

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热加工与快速凝固对Ni-Co-Al三元合金微观组织演变的影响

Effects of thermal processing and rapid solidification on the microstructural evolution in Ni-Co-Al ternary alloys

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