Effect of Forging Process on Microstructure and Properties of Fe10Cr10Co Soft Magnetic Alloy

Liu Jie; Wang Yanmou; Ma Jing; Li Zhu; Han Zhongjian

doi:10.20057/j.1003-8620.2025-00056

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Effect of Forging Process on Microstructure and Properties of Fe10Cr10Co Soft Magnetic Alloy

Forming and Phase Transition | 更新时间：2026-01-16

- Effect of Forging Process on Microstructure and Properties of Fe10Cr10Co Soft Magnetic Alloy
- Special Steel Vol. 47, Issue 1, Pages: 128-135(2026)
- 作者机构：
  
  西安钢研功能材料股份有限公司，西安 712046
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2025-00056
  CLC： TG142.1
- Received：05 March 2025，
  
  Published：30 January 2026
- 稿件说明：
移动端阅览
刘杰,王言眸,马静等.锻造工艺对Fe10Cr10Co软磁合金组织及性能的影响[J].特殊钢,2026,47(01):128-135.

Liu Jie,Wang Yanmou,Ma Jing,et al.Effect of Forging Process on Microstructure and Properties of Fe10Cr10Co Soft Magnetic Alloy[J].Special Steel,2026,47(01):128-135.
刘杰,王言眸,马静等.锻造工艺对Fe10Cr10Co软磁合金组织及性能的影响[J].特殊钢,2026,47(01):128-135. DOI： 10.20057/j.1003-8620.2025-00056.

Liu Jie,Wang Yanmou,Ma Jing,et al.Effect of Forging Process on Microstructure and Properties of Fe10Cr10Co Soft Magnetic Alloy[J].Special Steel,2026,47(01):128-135. DOI： 10.20057/j.1003-8620.2025-00056.

摘要

本研究系统揭示了Fe10Cr10Co软磁合金在热塑性变形过程中显微组织的动态演变规律，并深入阐明了其微观组织特征与力学性能及软磁性能之间的多尺度耦合作用机制。试验采用3T电液锤完成锻比分配及锻后冷却速率控制试验，通过光学显微镜、万能拉伸机及室温直流磁性能检测仪对试样进行多尺度表征。结果表明，当一火锻比为4.0、二火锻比为2.56时，经过砂冷处理的试样在热处理后组织均匀度最高，平均晶粒尺寸较小为18.19 μm，表现出最高的屈服强度345.0 MPa和伸长率44.0%。当一火锻比为3.16、二火锻比为3.24时，经过空冷处理的试样在热处理后组织均匀度最差，平均晶粒尺寸较小为13.66 μm，表现出最高的抗拉强度527.3 MPa。当一火锻比为3.16、二火锻比为3.24时，经过砂冷处理的试样组织较为均匀，平均晶粒尺寸较大为33.01 μm，表现出最高的磁感应强度、磁导率5.288 mH/m和最低的矫顽力107.5 A/m。综上所述，Fe10Cr10Co软磁合金通过采用一火次大变形、二火次小变形加缓冷的锻造工艺，在后续热处理过程中有效释放了组织中的残余应力并降低了位错密度，从而获得了均匀性最高，且晶粒尺寸较小的微观组织。这种微观结构的优化实现了力学性能与软磁性能的协同提升。

Abstract

This study systematically reveals the dynamic evolution of the microstructure of Fe10Cr10Co soft magnetic alloy during thermoplastic deformation and thoroughly elucidates the multi-scale coupling mechanism between its microstructural characteristics and mechanical properties as well as soft magnetic properties.The experiments were conducted using a 3T electro-hydraulic hammer to complete the forging ratio distribution and post-forging cooling rate control tests， and the samples were characterized at multiple scales by optical microscope， universal tensile machine and room temperature DC magnetic performance detector. The results indicate that when the once heating forging ratio is 4.0 and the twice heating forging ratio is 2.56， the sample subjected to sand cooling exhibits the highest uniformity in microstructure after heat treatment， with an average grain size of 18.19 μm， and demonstrates the highest yield strength of 345.0 MPa and elongation of 44.0%. For the sample with once heating forging ratio of 3.16 and twice heating forging ratio of 3.24， the air-cooled sample shows the poorest uniformity in microstructure after heat treatment， with an average grain size of 13.66 μm， but achieves the highest tensile strength of 527.3 MPa. Under the conditions of once heating forging ratio of 3.16 and twice heating forging ratio of 3.24， the sand-cooled sample exhibits relatively uniform microstructure， with a larger average grain size of 33.01 μm， and demonstrates the highest magnetic induction， permeability of 5.288 mH/m， and the lowest coercivity of 107.5 A/m. In summary， the Fe10Cr10Co soft magnetic alloy， through the application of a forging process involving a large deformation in the first pass and a small deformation in the second pass， combined with slow cooling after forging， effectively releases residual stress and reduces dislocation density during subsequent heat treatment， resulting in a microstructure with the highest uniformity and smaller grain size. This optimization of the microstructure achieves a synergistic improvement in mechanical and soft magnetic properties.

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