Non-oriented electrical steel sheet with fine magnetic performance, and calcium treatment method therefor
US10147528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2012 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Oct 23, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14791
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A non-oriented electrical steel sheet with fine magnetic performance, and a calcium treatment method therefor, including an RH (Ruhrstahl-Heraeus) refinement step. The RH refinement step sequentially comprises a decarbonization step, an aluminum deoxidation step, and a step of adding calcium alloy. In the step of adding calcium alloy, time when the calcium alloy is added satisfies the following condition: time interval between Al and Ca/total time after ΣAl=0.2-0.8. In this method, production cost is reduced, the production process is simple, a normal processing cycle of RH refinement is not affected, the device is convenient in operation and is controllable, and foreign substances are controllable in both shape and quantities. The non-oriented electrical steel sheet prepared according to the present invention has fine magnetic performance, and the method can be used for mass production of the non-oriented electrical steel sheet with fine magnetic performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.