The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2018
Filed:
Dec. 11, 2012
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Kanyi Shen, Shanghai, CN;
Guobao Li, Shanghai, CN;
Shuangjie Chu, Shanghai, CN;
Yezhong Sun, Shanghai, CN;
Huabing Zhang, Shanghai, CN;
Yongjie Yang, Shanghai, CN;
Zhuochao Hu, Shanghai, CN;
Bin Zhao, Shanghai, CN;
Qi Xu, Shanghai, CN;
Jie Huang, Shanghai, CN;
Peili Zhang, Shanghai, CN;
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Abstract
A manufacturing method of oriented silicon steel with magnetic induction B8 of not less than 1.88 T, comprising the following steps: 1) smelting and continuous casting to obtain a slab, wherein the content of N is controlled at 0.002-0.014 wt % in the smelting stage; 2) hot-rolling; 3) cold-rolling; 4) decarbonizing and annealing; 5) nitriding treatment, wherein infiltrated nitrogen content [N]is controlled to satisfy the formula: 328−0.14a−0.85b−2.33c≦[N]≦362−0.16a−0.94b−2.57c, wherein a is the content of Als in the smelting step, with the unit of ppm; b is the content of N element, with the unit of ppm; and c is primary grains size, with the unit of μm; 6) coating a steel's surfaces with a magnesium oxide layer and annealing; and 7) applying an insulating coating.