磁场对25CrMo48V超高强度钢回火组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.08.004

金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 24-33.DOI: 10.13251/j.issn.0254-6051.2022.08.004

磁场对25CrMo48V超高强度钢回火组织与力学性能的影响

杨晓斌^1,2, 董纪¹, 田春英¹, 宁保群², 赵倩³, 乔志霞³, 刘永长⁴

1.天津中德应用技术大学机械工程学院, 天津 300350;
2.天津理工大学材料科学与工程学院, 天津 300384;
3.天津商业大学机械工程学院, 天津 300134;
4.天津大学材料科学与工程学院水利安全与仿真国家重点实验室, 天津 300354

收稿日期:2022-05-31 修回日期:2022-07-01 出版日期:2022-08-25 发布日期:2022-09-19
通讯作者: 董纪,讲师,E-mail:dongji005@163.com
作者简介:杨晓斌(1996—),男,硕士,主要研究方向为金属材料热处理,E-mail:yangxiaobin9611@163.com。
基金资助:
国家自然科学基金青年项目(52004181,51804218);天津市科技特派员项目(20YDTPJC01130)

Effect of magnetic field on tempered microstructure and mechanical properties of 25CrMo48V ultra-high strength steel

Yang Xiaobin^1,2, Dong Ji¹, Tian Chunying¹, Ning Baoqun², Zhao Qian³, Qiao Zhixia³, Liu Yongchang⁴

1. School of Mechanical Engineering, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China;
2. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
3. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China;
4. State Key Laboratory of Water Safety and Simulation, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, China

Received:2022-05-31 Revised:2022-07-01 Online:2022-08-25 Published:2022-09-19

摘要/Abstract

摘要： 为研究磁场作用下热处理工艺对超高强度钢组织调控及碳化物种类、形态、尺寸和演变规律的影响,采用OM、SEM、TEM、EBSD和力学性能测试等技术手段研究了磁场作用对含有Nb、V、Ti等微合金元素的25CrMo48V超高强度钢中组织演变与力学性能的影响。试样均在1000 ℃下进行30 min奥氏体化处理,水淬之后在1 T磁场作用下,在200~600 ℃温度范围内回火1 h。结果表明,磁场的施加会抑制马氏体板条合并,促进M₂₃C₆和M₇C₃型碳化物的析出。经外加1 T磁场不同温度回火后,试样的硬度均高于未加磁场的常规回火处理试样,而其强度低于常规回火处理。

关键词: 磁场热处理, 微合金化, 微观结构, 碳化物, 力学性能

Abstract: In order to study the influence of magnetic field heat treatment on microstructure control of ultra-high strength steel and the type, shape, size and evolution of carbides, the effect of magnetic field on structure evolution and mechanical properties of the 25CrMo48V microalloyed ultra-high strength steel contaming Nb,V,Ti was studied by means of OM, SEM, TEM, EBSD and mechanical property test. All the specimens were austenitized at 1000 ℃ for 0.5 h, quenched with water, and then tempered at 200-600 ℃ for 1 h under the action of 1 T magnetic field. The rescuts show that the application of magnetic field will inhibit the merging of martensite laths and promote the precipitation of M₂₃C₆ and M₇C₃ type carbides. When tempered at different temperatures under the action of 1 T magnetic field, the hardness of the specimens is higher than that of the conventional tempering without magnetic field, but the strength is lower.

Key words: magnetic field heat treatment, microalloying, microstructure, carbide, mechanical properties

中图分类号:

TG156.97

杨晓斌, 董纪, 田春英, 宁保群, 赵倩, 乔志霞, 刘永长. 磁场对25CrMo48V超高强度钢回火组织与力学性能的影响[J]. 金属热处理, 2022, 47(8): 24-33.

Yang Xiaobin, Dong Ji, Tian Chunying, Ning Baoqun, Zhao Qian, Qiao Zhixia, Liu Yongchang. Effect of magnetic field on tempered microstructure and mechanical properties of 25CrMo48V ultra-high strength steel[J]. Heat Treatment of Metals, 2022, 47(8): 24-33.

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磁场对25CrMo48V超高强度钢回火组织与力学性能的影响

Effect of magnetic field on tempered microstructure and mechanical properties of 25CrMo48V ultra-high strength steel

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