循环淬火处理对9Ni钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.10.031

金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 197-205.DOI: 10.13251/j.issn.0254-6051.2025.10.031

循环淬火处理对9Ni钢组织与性能的影响

于文站¹, 杨洪福², 郑善举²

1.上海飞挺管业制造有限公司, 上海 201508;
2.昆明理工大学材料科学与工程学院, 云南昆明 650093

收稿日期:2025-03-11 修回日期:2025-07-24 出版日期:2025-10-25 发布日期:2025-11-04
作者简介:于文站(1986—),男,工程师,硕士,主要研究方向为海上高压低温材料的开发与产品应用,E-mail:yuwenzhan625@163.com
基金资助:
云南省基础研究计划(202501AT070302)

Effect of cyclic quenching treatment on microstructure and properties of 9Ni steel

Yu Wenzhan¹, Yang Hongfu², Zheng Shanju²

1. Shanghai Feiting Pipe Manufacture Co., Ltd., Shanghai 201508, China;
2. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China

Received:2025-03-11 Revised:2025-07-24 Online:2025-10-25 Published:2025-11-04

摘要/Abstract

摘要： 研究了循环淬火处理(750、780和810 ℃循环淬火1~4次)对9Ni钢的显微组织与力学性能的影响。通过光学显微镜、扫描电镜和硬度测试分析了晶粒细化规律及硬度变化,建立了描述晶粒长大规律的数学模型。结果表明:在810 ℃条件下经过4次循环淬火后,9Ni钢的晶粒细化效果最佳,其平均晶粒尺寸由1次淬火时的21.0 μm降至5.6 μm,硬度提升至355.5 HV0.5;而在750 ℃低温淬火时,硬度则随着循环次数的增加而降低。循环淬火通过累积相变应变能和增加缺陷组织钉扎晶界细化晶粒,3~4次循环后细化效果趋于稳定。基于试验数据,建立由细化项和粗化项定量表征的淬火温度、循环次数和保温时间对9Ni钢晶粒尺寸影响的多参数耦合模型。

关键词: 9Ni钢, 循环淬火, 晶粒细化, 硬度, 晶粒尺寸模型

Abstract: Effect of cyclic quenching treatment (at 750, 780 and 810 ℃ for 1-4 cycles) on microstructure and mechanical properties of 9Ni steel was investigated. The grain refinement and hardness evolution were analyzed by using optical microscope, scanning electron microscope and microhardness testing, and a mathematical model describing the law of grain growth was established. The results show that the most significant grain refinement is obtained by quenching at 810 ℃ for 4 cycles, with the average grain size decreasing from 21.0 μm of quenching for 1 cycle to 5.6 μm, and the hardness reaching 355.5 HV0.5. However, the hardness decreases with increase of quenching cycle at 750 ℃. Cyclic quenching refines the grains by accumulating phase transformation of strain energy and increasing defect structures that pin the grain boundaries. After 3-4 cycles, the refinement tends to stabilize. Based on the test data, a multi-parameter coupling model characterized by refinement and coarsening terms is established to quantitatively describe the combined effects of quenching temperature, cycle number and holding time on grain size of the 9Ni steel.

Key words: 9Ni steel, cyclic quenching, grain refinement, hardness, grain size model

中图分类号:

TG161

于文站, 杨洪福, 郑善举. 循环淬火处理对9Ni钢组织与性能的影响[J]. 金属热处理, 2025, 50(10): 197-205.

Yu Wenzhan, Yang Hongfu, Zheng Shanju. Effect of cyclic quenching treatment on microstructure and properties of 9Ni steel[J]. Heat Treatment of Metals, 2025, 50(10): 197-205.

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循环淬火处理对9Ni钢组织与性能的影响

Effect of cyclic quenching treatment on microstructure and properties of 9Ni steel

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