Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1974-06-20
1976-07-27
Satterfield, Walter R.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148 3155, 148112, H01F 104
Patent
active
039716783
ABSTRACT:
Alloy steel sheeting for electrical purposes such as the cores of transformers, is made with isotropic magnetic properties by a method in which steel containing, by weight, up to 0.1% carbon, from 0.15 to 0.35% manganese, from 0.3 to 2.4% aluminium up to 0.25% copper, up to 0.5% sulphur, up to 0.2% phosphorus, up to 2.0% silicon and the balance iron except for impurities is hot rolled at a temperature of from 820.degree. to 1080.degree.C to cause at least 5% of it to have a crystal orientation {100} <hkl>. After this the sheet is cold-rolled with a reduction in cross-section of from 50% to 85% and then it is recrystallization-annealed at a temperature of from 820.degree. to 1200.degree.C. Preferably the cold-rolling is carried out in two stages and the sheet is annealed for from 10 to 30 minutes at a temperature of from 550.degree. to 950.degree.C between the two stages.
REFERENCES:
patent: 2209687 (1940-07-01), Crafts
patent: 2307391 (1943-01-01), Cole et al.
patent: 3058857 (1962-10-01), Pavlovic et al.
patent: 3124491 (1964-03-01), Foster
patent: 3159511 (1964-12-01), Taguchi et al.
patent: 3212942 (1965-10-01), Takahashi
patent: 3347718 (1967-10-01), Carpenter et al.
patent: 3573112 (1971-03-01), Aspden
patent: 3632456 (1972-01-01), Sakakura et al.
patent: 3764406 (1973-10-01), Littmann
Satterfield Walter R.
Stahlwerke Peine-Salzgitter Aktiengesellschaft
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