发明名称 |
Magnetic shielding material for television cathode-ray tube and process for producing the same |
摘要 |
A 0.1 to 0.5 mm-thick plated steel sheet having high coercive force and magnetic flux density is provided by hot rolling a slab comprising by weight carbon: 0.01 to 0.09%, silicon: not more than 1.0%, phosphorus: not more than 0.3%, manganese: not more than 1.5%, sulfur: not more than 0.04%, aluminum: not more than 1.0%, and nitrogen: not more than 0.01% with the balance consisting of iron and unavoidable impurities, cold rolling the hot rolled sheet, annealing the cold rolled sheet to prepare a steel sheet having an average grain diameter of 3 to 15 mu m, temper rolling the steel sheet with a reduction ratio of not more than 3%, and plating the temper rolled sheet with chromium or nickel. This enables the provision of a magnetic shielding material having no significant drift and very good electron beam landing properties.
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申请公布号 |
US5871851(A) |
申请公布日期 |
1999.02.16 |
申请号 |
US19970920174 |
申请日期 |
1997.08.25 |
申请人 |
NIPPON STEEL CORPORATION;SONY CORPORATION |
发明人 |
FUKUMIZU, KEISUKE;KATO, HIROAKI;TAKEUCHI, TERUO;SHIMAZU, TAKAHIDE;SATO, YASUO;AMAIKE, TATSUO;YOSHIHARA, RYOICHI;HARADA, TAKESHI |
分类号 |
C21D8/02;C21D8/12;H01J29/06;(IPC1-7):B32B15/18 |
主分类号 |
C21D8/02 |
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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