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

doi:10.13251/j.issn.0254-6051.2022.08.004

Abstract

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

CLC Number:

TG156.97

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.

References

[1]Han X T, Tao P, Hong F D, et al. The pulsed high magnetic field facility and scientific research at Wuhan National High Magnetic Field Center[J]. Matter and Radiation at Extremes, 2017, 2(6): 278-286.
[2]兰东生, 闫献国, 陈峙, 等. 磁场深冷处理对YG11C硬质合金耐磨性的影响[J]. 金属热处理, 2021, 46(8): 184-188.
Lan Dongsheng, Yan Xianguo, Chen Zhi, et al. Effect of magnetic field cryogenic treatment on wear resistance of YG11C cemented carbide[J]. Heat Treatment of Metals, 2021, 46(8): 184-188.
[3]Kakeshita T, Shimizu K, Funada S, et al. Composition dependence of magnetic field-induced martensitic transformations in Fe-Ni alloys[J]. Acta Metallurgica, 1985, 33(8): 1381-1389.
[4]Wu G H, Hou T P, Wu K M, et al. Influence of high magnetic field on carbides and the dislocation density during tempering of high chromium-containing steel[J]. Journal of Magnetism and Magnetic Materials, 2019, 479: 43-49.
[5]Wang F, Qian D S, Hua L, et al. Effect of high magnetic field on the microstructure evolution and mechanical properties of M50 bearing steel during tempering[J]. Materials Science and Engineering A, 2020, 771: 138623.
[6]候廷平. 强磁场条件下耐热钢中合金碳化物的析出行为[D]. 武汉: 武汉科技大学, 2012.
[7]Hou T P, Peet M J, Hulme-Smith C H, et al. The determining role of magnetic field in iron and alloy carbide precipitation behaviors under the external field[J]. Scripta Materialia, 2016, 120: 76-79.
[8]Zhou Z N, Wu K M. Molybdenum carbide precipitation in an Fe-C-Mo alloy under a high magnetic field[J]. Scripta Materialia, 2009, 61: 670-673.
[9]Xia Z X, Zhang C, Lan H, et al. Effect of magnetic field on interfacial energy and precipitation behavior of carbides in reduced activation steels[J]. Materials Letters, 2011, 65: 937-939.
[10]Hou T P, Wu K M. Alloy carbide precipitation on tempered 2.25Cr-Mo steel under high magnetic field[J]. Acta Materialia, 2013, 61: 2016-2024.
[11]Dong J, Zhou X S, Liu Y C, et al. Carbide precipitation in Nb-V-Ti microalloyed ultra-high strength steel during tempering[J]. Materials Science and Engineering A, 2017, 683: 215-226.
[12]Wu G H, Hou T P, Li Z H, et al. Effect of high magnetic field on the recovery of tempered martensite[J]. Progress in Natural Science: Materials International, 2020, 30(1): 134-137.
[13]李亮军, 张家敏, 迟宏宵, 等. 热处理工艺对M2高速钢组织和性能的影响[J]. 金属热处理, 2021, 46(9): 72-79.
Li Liangjun, Zhang Jiamin, Chi Hongxiao, et al. Influence of heat treatment process on microstructure and properties of M2 high speed steel[J]. Heat Treatment of Metals, 2021, 46(9): 72-79.
[14]Li L L, Zhang Z J, Zhang P, et al. Distinct fatigue cracking modes of grain boundaries with coplanar slip systems[J]. Acta Materialia, 2016, 120: 120-129.
[15]Jung J, Park J, Kim J, et al. Carbide precipitation kinetics in austenite of a Nb-Ti-V microalloyed steel[J]. Materials Science and Engineering A, 2011, 528: 5529-5535.
[16]王玉岱, 刘洋, 朱言言, 等. 热处理对复合制造AerMet100超高强度钢组织均匀性与拉伸性能的影响[J]. 金属热处理, 2022, 47(4): 1-9.
Wang Yudai, Liu Yang, Zhu Yanyan, et al. Effect of heat treatment on microstructure homogeneity and tensile properties of hybrid fabricated AerMet100 ultra-high strength steel[J]. Heat Treatment of Metals, 2022, 47(4): 1-9.
[17]Xiong X C, Chen B, Huang M X, et al. The effect of morphology on the stability of retained austenite in a quenched and partitioned steel[J]. Scripta Materialia, 2013, 68(5): 321-324.
[18]朱高杰, 邹龙江, 任晓磊, 等. 6082-T6铝合金的微观组织与拉伸断裂的关系[J]. 金属热处理, 2021, 46(5): 47-54.
Zhu Gaojie, Zou Longjiang, Ren Xiaolei, et al. Relationship between microstructure and tensile fracture of 6082-T6 aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(5): 47-54.
[19]Fukuda T, Maeda H, Yasui M, et al. Influence of magnetocrystalline anisotropy on martensitic transformation under magnetic field of single-crystalline Ni2MnGa[J]. Scripta Materialia, 2009, 60(4): 261-263.
[20]Liu T, Cao Z, Wang H, et al. A new 2.4 GPa extra-high strength steel with good ductility and high toughness designed by synergistic strengthening of nano-particles and high-density dislocations[J]. Scripta Materialia, 2020, 178: 285-289.
[21]黄昆. 固体物理学[M]. 北京: 人民教育出版社, 1966.
[22]Zhang G H, Enomoto M. Influence of magnetic field on isothermal pearlite transformation in Fe-C-Ni hypoeutectoid alloy[J]. Materials Science and Technology, 2010, 26(3): 269-275.
[23]Zhang Y D, Zhao X, Bozzolo N, et al. Low Temperature tempering of a medium carbon steel in high magnetic field[J]. ISIJ International, 2005, 45: 913-917.
[24]赵文祥, 姚洪民, 梁志强, 等. 脉冲磁场对高速钢刀具材料微观硬度的影响[J]. 北京理工大学学报, 2014, 34(7): 661-665.
Zhao Wenxiang, Yao Hongmin, Liang Zhiqiang, et al. Effects of pulsed magnetic field on the micro-hardness of HSS cutting tool material[J]. Transactions of Beijing Institute of Technology, 2014, 34(7): 661-665.