发明名称 |
MAGNETIC STEEL PLATE WITH HIGH PERMEABILITY AND METHOD FOR MAKING SAME |
摘要 |
A process for the production of oriented-grain high magnetic permeability steel sheet including the steps of continuously casting a steel slab haing a weight % composition within the range of 2.5-3.5 Si, 0.01-0.04 S, less than 0.07 C, less than 0.15 Mn, and an acid-soluble aluminum in an amount between 0.01 and 0.05, at a feed rate ranging from 700 to 1000 kg/minute, into an ingot mold of a length over 1200 mm and cooling it in said ingot mold with a quantity of water ranging from 2.8 to 4 m3 per ton of steel; heating the slab so obtained to 1300 DEG -1400 DEG C and immediately thereafter hot-rolling it to a thickness in the range between 2 and 3.1 mm, annealing the strip so obtained at a temperature in the range between 1050 DEG and 1150 DEG C, keeping it at this temperature for a duration between 5 and 30 seconds; cooling it at any desired cooling rate to 750 DEG -850 DEG C at a temperature at which austenite is still present in it; keeping the strip at this temperature for a duration ranging from 30 to 200 seconds; and finally quenching it from the initial quenching temperature of 400 DEG C at a cooling rate of between 10 DEG C/second and 100 DEG C/second; cold-rolling the strip so obtained with a reduction rate ranging from 80 to 90% and subjecting it finally to the decarburization and recrystallization annealing operations as well as to other final anneals. |
申请公布号 |
HU171089(B) |
申请公布日期 |
1977.11.28 |
申请号 |
HU1975CE01056 |
申请日期 |
1975.09.26 |
申请人 |
CENTRO SPERIMENTALE METALLURGICO SPA,IT;TERNI SOCIETA PER L'INDUSTRIA E L'ELETTRICITA SPA,IT |
发明人 |
BARISONI,MARIO,IT;BITTI,ROBERTO R.,IT;BROZZO,PIETRO,IT;BARTERI,MASSIMO,IT;BARIANESCHI,EDMONDO,IT |
分类号 |
H01F1/16;C21D8/12;C22C38/02 |
主分类号 |
H01F1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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