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The effects of adding rare earth element Ce on microstructure and magnetic properties of non-oriented silicon steel 50W470 are studied from such aspects as inclusions, precipitates, grain size and texture. The proportion of central equiaxed crystal in the billet of non-oriented silicon steel after adding rare earth element is 41%~45%, size of rare earth inclusions existed in forms of globularity and rod without sharp corner is about 664 nm. There is obvious inhomogeneity of microstructure on the RD-ND plane of hot rolled microstructure, it is mainly recrystal microstructure with a small amount of banded microstructure on surface layer and mainly banded microstructure in the center as well as there are part of recrystallized grains among banded microstructure. For the finished product of rare earth doped non-oriented silicon steel 50W470 produced with complete process, its magnetic properties, iron loss P1.5/50 is 3.142 W/kg and magnetic induction intensity B50 is 1.705 T.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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