STRONGLY MAGNETIC ORIENTED HIGH-SILICON STEEL ULTRATHIN STRIP AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2022/161048

A1

The present application belongs to the field of electrical steel fabrication, and provides a strongly magnetic oriented high-silicon steel ultrathin strip and a preparation method therefor. The strongly magnetic oriented high-silicon steel ultrathin strip comprises the following elements in percentage by mass: 0.0045 to 0.0060% C; 4.5% to 5.0% Si; 0.23% to 0.32% Mn; 0.02% to 0.03% S; 0.03% to 0.08% Bi; 0.027% to 0.035% Als; 0.02% to 0.03% Cu; 0.008% to 0.010% N; P<0.005%; and the remainder is iron, wherein the Cu, S and N elements are added into a strongly magnetic oriented high-silicon steel ultrathin strip in the form of a polynuclear coordination compound containing sulfur, nitrogen and copper during smelting. In the present application, by means of designing the raw material components of oriented high-silicon steel, and using the polynuclear coordination compound containing sulfur, nitrogen and copper, and a Bi element as alloy inhibitors, the prepared strongly magnetic oriented high-silicon steel ultrathin strip has fine grains, a uniform structure, and excellent magnetic properties having high magnetic induction intensity and low iron loss.

WANG BO (CN)
ZHANG DI (CN)
SUN HUILAN (CN)
GUO ZHIHONG (CN)
ZHU LIGUANG (CN)

PCT/CN2021/140773

August 04, 2022

December 23, 2021

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UNIV HEBEI SCIENCE & TECH (CN)

C22C38/02; C21D1/26; C21D1/70; C21D1/74; C21D1/773; C21D8/12; C22C38/04; C22C38/06; C22C38/16

CN112962028A	2021-06-15
JPH07179942A	1995-07-18
JP2014167147A	2014-09-11
CN103911545A	2014-07-09
CN108456767A	2018-08-28
CN109097677A	2018-12-28

HEBEI GUOWEIZHIYUAN INTELLECTUAL PROPERTY AGENCY CO.,LTD (CN)

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