发明名称 |
METHOD FOR FORMING AN INSULATING COATING ON AN ORIENTED SILICON STEEL SHEET |
摘要 |
<p>1482546 Treating silicon steel KAWASAKI STEEL CORP 1 Oct 1974 [17 Nov 1973] 42645/74 Heading C7U An aqueous dispersion for coating a Si steel sheet comprises 7-24 wt per cent colloidal SiO 2 and 5-30 wt per cent Mg monophosphate. It may have added to it 0À01-5% of CrO 3 , a chromate or a dichromate. The composition is applied to the sheet and the resulting coating is baked at 350‹- 900‹C; this may be in two stages, e.g. first at 350‹- 600‹C and then at 800‹C to 900‹C, in a neutral or weakly oxidizing atmosphere, e.g. air. The surface of the steel is left in tension when the coating cools, thereby improving magnetostriction properties of the steel when under compression , e.g. in transformer cores.</p> |
申请公布号 |
CA1021672(A) |
申请公布日期 |
1977.11.29 |
申请号 |
CA19740209263 |
申请日期 |
1974.09.16 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
SHIMANAKA, HIROSHI;ICHIDA, TOSHIO;KOBAYASHI, SHIGERU |
分类号 |
C23C22/00;C09D1/00;C09D5/25;C21D1/70;C21D9/46;C23C22/74;H01F1/147 |
主分类号 |
C23C22/00 |
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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