Semi-process non-oriented electromagnetic steel strip having low core loss and high magnetic permeability, and method of making
US5013372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | May 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1244
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A semi-process non-oriented electromagnetic steel strip having low core loss and high magnetic permeability is provided which consists essentially of, in % by weight, up to 0.02% of C, 0.2 to 2.0% of Si, 0.1 to 0.6% of Al, 0.02 to 0.10% of P, 0.5 to 1.5% of Mn, 0.1 to 1.0% of Ni, and optionally up to 0.6% of Cu, and optionally 0.01 to 0.2% of Sb and/or Sn, and a balance of iron and inevitable impurities. Magnetic properties are further improved when it is manufactured by hot rolling a slab having the composition at a temperature of from 1,100.degree. to 1,200.degree. C., completing hot finish rolling at a temperature of at least 700.degree. C. in the austenite region, annealing the strip at a temperature from 800.degree. to 880.degree. C. for at least one hour, cold rolling and annealing the strip, and optionally, skin pass rolling with a reduction of 2 to 12%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.