Magnetic performance and microstructure characterisation of powder metallurgy Fe–6.5 wt-% Si high-silicon steel
Magnetic performance and microstructure characterisation of powder metallurgy Fe–6.5 wt-% Si high-silicon steel
复制标题
DOI：
10.1080/00325899.2021.2014650
复制
发表时间：
2021-12
影响因子：
1.4
通讯作者：
Q. Qin;G. Li;Fang Yang;Pei Li;Cun-guang Chen;J. Hao;Zhimeng Guo
中科院分区：
文献类型：
--
作者：
Q. Qin;G. Li;Fang Yang;Pei Li;Cun-guang Chen;J. Hao;Zhimeng Guo
采用低氧气体雾化粉末直接烧结-轧制工艺制备了Fe-6.5wt-% Si粉末冶金高硅钢带。由于其差的可成形性，气体雾化粉末直接烧结，在粉末顶部覆盖有1 kg重的东西。烧结样品的相对密度约为94.1%，孔隙率为5.9%。孔钉扎效应阻止了烧结过程中超大晶粒的形成，有利于后续轧制。晶粒尺寸控制在100-300 μm。冷轧后产生大量亚晶界和变形带，使强度提高到1190 MPa。值得注意的是，这两者在退火后会消失。相反，形成了有序的B2和D 03相，高硅钢的织构主要为{100}。实现了0.55 W kg−1的低铁损W10/50值。
Powder metallurgy high-silicon steel strip (Fe–6.5 wt-% Si) was prepared by directly sintering followed by rolling using gas atomised powder with low oxygen content. Due to its poor formability, the gas atomised powder was directly sintered with something heavy of 1 kg overlaid on powder top. The relative density of sintered samples was about 94.1% and the porosity was 5.9%. The pore pinning effect prevented the formation of extremely large grains during sintering, which was beneficial for subsequent rolling. The grain size was controlled in the range of 100–300 μm. After cold rolling, a large number of sub-grain boundaries and deformation bands were generated, which increased the strength to 1190 MPa. It was worth noting that these two would disappear after annealing. Instead, ordered B2 and D03 phases were formed, and the texture of high-silicon steel was mainly {100}. A low iron loss W10/50 value of 0.55 W kg−1 was achieved.