|
|
|
| Fabricating functionally graded Fe–Cr–Co permanent magnetic alloys via laser powder bed fusion |
| Ya-zhou He1,2, Ya-qing Hou2, Peng Shen1, Hao Zhang1,2, Dong Zhou1, Hang Su2 |
| 1 Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China 2 Material Digital R&D Center, China Iron and Steel Research Institute Group Co., Ltd., Beijing 100081, China |
|
|
|
|
Abstract Laser powder bed fusion (LPBF) in-situ alloying technology offers the possibility to construct gradient materials with varied structures and properties. Functionally graded Fe–Cr–Co permanent magnetic alloys were fabricated by LPBF and in-situ alloying mixed powders of Fe, Cr, and Co elements. The effects of different Fe, Cr and Co contents on the microstructure, magnetic properties and hardness of Fe–Cr–Co alloys prepared by LPBF were studied. The as-built Fe–Cr– Co alloys present a single body-centered-cubic phase and have a homogeneous distribution of elements. The mechanical properties and magnetic properties of the compositionally graded sample show a gradient variation. With the increase in Cr content, the Vickers hardness of the sample increases, and the saturation magnetization of the sample decreases. The optimal magnetic properties in an isotropic state are given as coercivity HcB= 21.65 kA/m, remanence Br= 0.70 T and energy product (BH)max= 5.35 kJ/m3, which are comparable to or higher than the reported magnetic properties in an isotropic state prepared by traditional powder metallurgy. LPBF in-situ alloying technology has the potential to further explore Fe–Cr–Co magnetic materials, such as those consisting of multiple or more constituent elements, and to maximize the compositional flexibility of magnetic materials.
|
|
|
|
|
|
| Cite this article: |
|
Ya-zhou He,Ya-qing Hou,Peng Shen, et al. Fabricating functionally graded Fe–Cr–Co permanent magnetic alloys via laser powder bed fusion[J]. Journal of Iron and Steel Research International, 2024, 31(3): 729-737.
|
|
|
|
| [1] |
Jing‑jing Pei, Jin‑hu Wu, Wen‑qing Huo, Yu‑zhu Zhang, Hong‑wei Xing, Qian‑qian Ren. Structure characterization and grinding performance of gas-quenched steel slag abrasive[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(4): 383-390. |
| [2] |
Qian Gao, Xian-hui Wang, Jun Li, Jian Gong, Bo Li. Effect of aluminum on secondary recrystallization texture and magnetic properties of grain-oriented silicon steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(4): 479-487. |
| [3] |
Lei‑qiang Lai, Yan‑hui Li, Feng Bao, Wei Zhang. Effects of Sm content on crystallized structure and magnetic properties of Co80?xSmxb20 amorphous alloys[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(4): 471-476. |
| [4] |
An-hua Li, Long-long Xi, Hai-bo Feng, Ning Zou, Min Tan, Ming-gang Zhu, Wei Li. Development of Ce-based sintered magnets: review and prospect[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(1): 1-11. |
| [5] |
Jing Qin, De-fu Liu, Ye Yue, Hong-jin Zhao, Chao-bin Lai. Effect of normalization on texture evolution of 0.2-mm-thick thingauge non-oriented electrical steels with strong g-fiber textures[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(11): 1219-1227. |
| [6] |
Xu Li . Yang Li . Ying-hui Wei, . Li-feng Hou . Bao-sheng Liu . Hong-bo Qu . Yi-de Wang. Effect of surface self-nanocrystallization and Si infiltration on Si diffusion behavior, hardness and magnetic properties of pure Fe[J]. , 2018, 25(9): 923-931. |
|
|
|
|
2024, Vol. 31 
