固溶处理对Ni48Cr21Cu2Mo合金组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.05.017

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 105-110.DOI: 10.13251/j.issn.0254-6051.2022.05.017

固溶处理对Ni48Cr21Cu2Mo合金组织与力学性能的影响

刘璇¹, 黄国平^1,2,3, 刘海定^1,2,3, 何曲波^1,2,3, 张楠¹

1.重庆材料研究院有限公司, 重庆 400707;
2.国家仪表功能材料工程技术研究中心, 重庆 400707;
3.耐腐蚀合金重庆市重点实验室, 重庆 400707

收稿日期:2021-11-09 修回日期:2022-02-25 出版日期:2022-05-25 发布日期:2022-06-16
作者简介:刘璇(1990—),女,工程师,主要研究方向为特种合金加工,E-mail: liuxuan-cqu@foxmail.com
基金资助:
北碚区技术创新与应用示范类项目(2020-7);国机集团重大专项(SINOMAST-ZDZX-2019-03)

Effect of solution treatment on microstructure and mechanical properties of Ni48Cr21Cu2Mo alloy

Liu Xuan¹, Huang Guoping^1,2,3, Liu Haiding^1,2,3, He Qubo^1,2,3, Zhang Nan¹

1. Chongqing Materials Research Institute Co., Ltd., Chongqing 400707, China;
2. National Engineering Research Center for Instrument Functional Materials, Chongqing 400707, China;
3. Chongqing Key Laboratory of Corrosion-resistant Alloys, Chongqing 400707, China

Received:2021-11-09 Revised:2022-02-25 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 采用材料分析模拟软件(JMatPro)、X射线衍射仪(XRD)和扫描电镜(SEM)等研究了Ni48Cr21Cu2Mo合金棒材随不同制度固溶处理后组织性能的演化规律。平衡相图计算结果显示,温度超过990 ℃时,合金基体组织基本已为γ相,在870~1008 ℃存在Laves相,870 ℃以下析出δ、γ′和σ相。合金显微组织研究结果显示,随着固溶温度的升高,晶粒尺寸不断长大、颗粒相逐步回溶,经1010 ℃固溶处理后的显微组织最均匀且其中颗粒相已基本回溶。时效后,合金中析出γ′相和γ″相,晶界出现粒状δ、σ复合相。经1010 ℃×1 h固溶并在718 ℃×8 h+622 ℃×8 h时效处理后的Ni48Cr21Cu2Mo合金具有优良的综合力学性能。

关键词: 高强度耐腐蚀合金, 显微组织, 热处理, 力学性能

Abstract: Evolution of microstructure and mechanical properties of the Ni48Cr21Cu2Mo alloy varied with solution treatment temperature were investigated by means of the material analysis simulation software (JMatPro), X-ray diffractometer (XRD) and scanning electron microscope (SEM). The calculated equilibrium phase results show that the matrix is almost γ phase when the temperature is above 990 ℃, and the Laves phase appears in the temperature range from 870 ℃ to 1008 ℃. The δ, γ′ and σ phases are precipitated when temperature below 870 ℃. The experimental results of microstructure indicate that the grain size increases and the granular phases are redissolved gradually with the increase of solution temperature. When solution treated at 1010 ℃, the microstructure is the most homogeneous and the particle phases are basically redissolved. The γ′ and γ″ phases and the granular δ and σ composite phases precipitated at grain boundaries occur after aging. The Ni48Cr21Cu2Mo alloy has excellent comprehensive mechanical properties under 1010 ℃×1 h solution treatment and 718 ℃×8 h+622 ℃×8 h aging.

Key words: high-strength corrosion resistant alloy, microstructure, heat treatment, mechanical properties

中图分类号:

TG156.2

刘璇, 黄国平, 刘海定, 何曲波, 张楠. 固溶处理对Ni48Cr21Cu2Mo合金组织与力学性能的影响[J]. 金属热处理, 2022, 47(5): 105-110.

Liu Xuan, Huang Guoping, Liu Haiding, He Qubo, Zhang Nan. Effect of solution treatment on microstructure and mechanical properties of Ni48Cr21Cu2Mo alloy[J]. Heat Treatment of Metals, 2022, 47(5): 105-110.

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固溶处理对Ni48Cr21Cu2Mo合金组织与力学性能的影响

Effect of solution treatment on microstructure and mechanical properties of Ni48Cr21Cu2Mo alloy

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