| 摘要 |
<p>The present invention relates to an improvement in the manufacture of grain-oriented silicon steels. United States Patent No. 4,102,713 which issued to the applicant on July 25, 1978 teaches a process wherein manganese dioxide is incorporated within a boron-bearing base coating for application to a boron-bearing steel. Oxygen in the manganese dioxide contributes to the formation of a high quality base coating on boron-bearing steels which receive a low dew point final normalize. As a certain amount of oxygen must be present in the scale of silicon steel to render the surface susceptible to formation of a high quality base coating; a means of adding oxygen to the scale of boron-bearing steels was sought out. The scale of boron bearing silicon steels is low in oxygen, as these steels receive a low dew point final normalize. One such means of adding oxygen is disclosed in U.S. Patent 4,102,713. Disclosed therein is a base coating containing manganese</p> |
