Patents by Inventor Meihong Wu
Meihong Wu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240071661Abstract: A manufacturing method for low-magnetostrictive oriented silicon steel is provided, wherein the oriented silicon steel comprises a silicon steel substrate and an insulating coating on the surface of the silicon steel substrate. The manufacturing method comprises: performing single-sided laser etching on the silicon steel substrate, wherein the side of the silicon steel substrate, on which single-sided laser etching is performed, is a first surface, and the side opposite to the first surface is a second surface; determining a deflection difference between the first surface and the second surface based on the power of the laser etching, and determining a difference in the amount of the insulating coatings on the first surface and the second surface based on the deflection difference; and forming insulating coatings on the first surface and the second surface.Type: ApplicationFiled: January 11, 2022Publication date: February 29, 2024Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Meihong WU, Guobao LI, Shuangjie CHU, Zipeng ZHAO, Baojun LIU, Kanyi SHEN, Yongjie YANG, Zhuochao HU, Yaming JI, Chen LING
-
Patent number: 11638971Abstract: A grain-oriented silicon steel with low iron loss, wherein the silicon steel is provided with a plurality of grooves on its surface, each of the grooves is 10-60 ?m in width and 5-40 ?m in depth, and the spacing between adjacent grooves is 1-10 mm. The manufacturing method therefor comprises: scoring the surface of the grain-oriented silicon steel with low iron loss by using a laser in order to form the grooves. The grain-oriented silicon steel with low iron loss can maintain the magnetic domain refining effect in a stress-relief annealing process, and avoid the introduction of more residual stress.Type: GrantFiled: January 24, 2018Date of Patent: May 2, 2023Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Meihong Wu, Zipeng Zhao, Guobao Li, Kanyi Shen, Zhuochao Hu, Chen Ling, Huande Sun, Huabing Zhang
-
Patent number: 11633809Abstract: A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel.Type: GrantFiled: June 20, 2018Date of Patent: April 25, 2023Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Shuangjie Chu, Zipeng Zhao, Yongjie Yang, Changsong Ma, Meihong Wu, Yaming Ji, Aihua Ma, Weiyong Xie, Hai Liu, Jianguo Guo
-
Patent number: 11459634Abstract: Disclosed is a method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel, the method comprising: carrying out, by means of a pulse laser, scanning grooving on a single surface or two surfaces of a silicon steel sheet after cold rolling, or after decarburizing annealing, or after high temperature annealing or after hot stretching, temper rolling and annealing, and forming several grooves parallel with each other in a rolling direction of the silicon steel sheet, wherein a single pulse time width of the pulse laser is 100 ns or less, and a single pulse peak energy density is 0.Type: GrantFiled: June 21, 2018Date of Patent: October 4, 2022Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Shuangjie Chu, Guobao Li, Yongjie Yang, Zipeng Zhao, Changsong Ma, Kanyi Shen, Meihong Wu, Yaming Ji, Huabing Zhang, Zhuochao Hu
-
Publication number: 20220275470Abstract: Disclosed is a high-magnetic-induction oriented silicon steel, wherein the chemical elements thereof are, in mass percentage: Si: 2.0-4.0%; C: 0.03-0.07%; Al: 0.015-0.035%; N: 0.003-0.010%; Nb: 0.0010-0.0500%, the balance being Fe and inevitable impurities. The manufacturing method for the high-magnetic-induction oriented silicon steel includes the steps of: (1) smelting and casting; (2) heating a slab; (3) hot rolling; (4) cold rolling; (5) decarbonizing and annealing; (6) nitriding treatment; (7) applying an MgO coating; (8) high temperature annealing; and (9) applying an insulating coating; wherein a high-magnetic-induction oriented silicon steel is obtained by the manufacturing method, having an average primary grain size of 14-22 ?m and a primary grain size variation coefficient of higher than 1.Type: ApplicationFiled: August 11, 2020Publication date: September 1, 2022Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Huabing ZHANG, Guobao LI, Kanyi SHEN, Baojun LIU, Changjun HOU, Xinqiang ZHANG, Jianbing CHEN, Meihong WU, Changsong MA, Desheng LIU
-
Patent number: 11355275Abstract: A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 ?m, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 ?m, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.Type: GrantFiled: January 24, 2018Date of Patent: June 7, 2022Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Zipeng Zhao, Guobao Li, Yongjie Yang, Meihong Wu, Changsong Ma, Yaming Ji, Chen Ling, Weiyong Xie, Jianguo Guo
-
Publication number: 20210101230Abstract: A grain-oriented silicon steel with low iron loss, wherein the silicon steel is provided with a plurality of grooves on its surface, each of the grooves is 10-60 ?m in width and 5-40 ?m in depth, and the spacing between adjacent grooves is 1-10 mm. The manufacturing method therefor comprises: scoring the surface of the grain-oriented silicon steel with low iron loss by using a laser in order to form the grooves. The grain-oriented silicon steel with low iron loss can maintain the magnetic domain refining effect in a stress-relief annealing process, and avoid the introduction of more residual stress.Type: ApplicationFiled: January 24, 2018Publication date: April 8, 2021Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Meihong WU, Zipeng ZHAO, Guobao LI, Kanyi SHEN, Zhuochao HU, Chen LING, Huande SUN, Huabing ZHANG
-
Publication number: 20210023659Abstract: A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel.Type: ApplicationFiled: June 20, 2018Publication date: January 28, 2021Inventors: Shuangjie CHU, Zipeng ZHAO, Yongjie YANG, Changsong MA, Meihong WU, Yaming JI, Aihua MA, Weiyong XIE, Hai LIU, Jianguo GUO
-
Publication number: 20200362433Abstract: Disclosed is a method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel, the method comprising: carrying out, by means of a pulse laser, scanning grooving on a single surface or two surfaces of a silicon steel sheet after cold rolling, or after decarburizing annealing, or after high temperature annealing or after hot stretching, temper rolling and annealing, and forming several grooves parallel with each other in a rolling direction of the silicon steel sheet, wherein a single pulse time width of the pulse laser is 100 ns or less, and a single pulse peak energy density is 0.Type: ApplicationFiled: June 21, 2018Publication date: November 19, 2020Inventors: Shuangjie CHU, Guobao LI, Yongjie YANG, Zipeng ZHAO, Changsong MA, Kanyi SHEN, Meihong WU, Yaming JI, Huabing ZHANG, Zhuochao HU
-
Publication number: 20200058434Abstract: A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 ?m, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 ?m, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.Type: ApplicationFiled: January 24, 2018Publication date: February 20, 2020Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Zipeng ZHAO, Guobao LI, Yongjie YANG, Meihong WU, Changsong MA, Yaming JI, Chen LING, Weiyong XIE, Jianguo GUO
-
Patent number: 10566119Abstract: The invention discloses an oriented silicon steel with excellent magnetic properties and a manufacturing method thereof. The present invention obtains the oriented silicon steel with excellent magnetic properties by controlling the area ratio of small crystal grains of D<5 mm in an oriented silicon steel finished product to be not more than 3%, and controlling the ratio ?17/?15 of the magnetic conductivity under the magnetic induction of 1.7 T and 1.5 T in the oriented silicon steel finished product to be 0.50 or more.Type: GrantFiled: December 11, 2012Date of Patent: February 18, 2020Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Guohua Yang, Xiandong Liu, Guobao Li, Yongjie Yang, Zhuochao Hu, Hongxu Hei, Jun Zhang, Dejun Su, Huande Sun, Meihong Wu
-
Patent number: 10236105Abstract: The invention relates to high magnetic induction oriented silicon steel and a preparation method thereof. The oriented silicon steel comprises the following chemical elements by weight percent: 0.035-0.120% of C, 2.9-4.5% of Si, 0.05-0.20% of Mn, 0.005-0.050% of P, 0.005-0.012% of S, 0.015-0.035% of Als, 0.001-0.010% of N, 0.05-0.30% of Cr, 0.005-0.090% of Sn, not more than 0.0100% of V, not more than 0.0100% of Ti, at least one of trace elements of Sb, Bi, Nb and Mo, and the balance of Fe and other inevitable impurities, wherein Sb+Bi+Nb+Mo is 0.0015-0.0250% and (Sb/121.8+Bi/209.0+Nb/92.9+Mo/95.9)/(Ti/47.9+V/50.9) ranges from 0.1 to 15.Type: GrantFiled: December 11, 2012Date of Patent: March 19, 2019Assignee: BAOSHAN IRON & STEEL CO., LTDInventors: Huabing Zhang, Guobao Li, Xijiang Lu, Yongjie Yang, Zhuochao Hu, Kanyi Shen, Jiaqiang Gao, Meihong Wu
-
Patent number: 9460054Abstract: A method for detecting electromagnetic property of oriented silicon steel, the method comprises: measuring Euler angles of each of crystal grains in a specimen by use of metallographic etch-pit method; calculating orientation deviation angle ?i (degree) of the crystal grain; combining area Si (mm2) of the crystal grain and correction coefficient X of element Si (X=0.1˜10 T/degree); correcting on the basis of the magnetic property B0 (saturation magnetic induction, T) of single-crystal material by using these parameters (?i, Si, X), formula for correcting is B 8 = - 0.015 × X × ? n = 1 i ? S i ? ? ? i ? ? n = 1 i ? S i + ( B 0 - 0.04 ) ( 1 ) obtaining electromagnetic property B8 of the oriented silicon steel by the above calculations.Type: GrantFiled: April 12, 2011Date of Patent: October 4, 2016Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Meihong Wu, Weizhong Jin, Huande Sun, Guohua Yang, Kanyi Shen, Jie Huang, Guobao Li
-
Publication number: 20150302962Abstract: The invention discloses an oriented silicon steel with excellent magnetic properties and a manufacturing method thereof. The present invention obtains the oriented silicon steel with excellent magnetic properties by controlling the area ratio of small crystal grains of D<5 mm in an oriented silicon steel finished product to be not more than 3%, and controlling the ratio ?17/?15 of the magnetic conductivity under the magnetic induction of 1.7 T and 1.5 T in the oriented silicon steel finished product to be 0.50 or more.Type: ApplicationFiled: December 11, 2012Publication date: October 22, 2015Inventors: Guohua YANG, Xiandong LIU, Guobao LI, Yongjie YANG, Zhuochao HU, Hongxu HEI, Jun ZHANG, Dejun SU, Huande SUN, Meihong WU
-
Publication number: 20150206633Abstract: The invention relates to high magnetic induction oriented silicon steel and a preparation method thereof. The oriented silicon steel comprises the following chemical elements by weight percent: 0.035-0.120% of C, 2.9-4.5% of Si, 0.05-0.20% of Mn, 0.005-0.050% of P, 0.005-0.012% of S, 0.015-0.035% of Als, 0.001-0.010% of N, 0.05-0.30% of Cr, 0.005-0.090% of Sn, not more than 0.0100% of V, not more than 0.0100% of Ti, at least one of trace elements of Sb, Bi, Ni and Mo, and the balance of Fe and other inevitable impurities, wherein Sb+Bi+Nb+Mo is 0.0015-0.0250% and (Sb/121.8+Bi/209.0+Nb/92.9+Mo/95.9)/(Ti/47.9+V/50.9) ranges from 0.1 to 15.Type: ApplicationFiled: December 11, 2012Publication date: July 23, 2015Inventors: Huabing Zhang, Guabao Li, Xijiang Lu, Yongjie Yang, Zhuochao Hu, Kanyi Shen, Jiaqiang Gao, Meihong Wu
-
Publication number: 20130299049Abstract: A method for manufacturing a grain-oriented silicon steel having excellent magnetic performance, comprising steps as follows 1)conventionally melting and casting into a steel blank; 2) heating the steel blank and hot rolling the same into a strip of steel; 3)normalizing process; carrying out the normalizing process having two stages, wherein the strip is firstly heated to 1100˜1200° C., then cooled to 900˜1000° C. within 50˜200 s; and next, the strip is rapidly cooled in water having a temperature of 10-100; in this period, a tension force is applied to the strip of steel, the strip of steel in the temperature range of 900 ° C.˜500° C. has a stress of 1˜200N/mm2; 4)cold rolling, i.e. carrying out a primary cold rolling, or a double cold rolling with intermediate annealing; 5)carrying out primary recrystallizing annealing, then coating an annealing separator, whose main composition is MgO, to carry out final product annealing comprising secondary recrystallizing annealing and purifying annealing.Type: ApplicationFiled: April 28, 2011Publication date: November 14, 2013Inventors: Meihong Wu, Weizhong Jin, Huande Sun, Guohua Yang, Kanyi Shen, Jie Huang, Deyang Hu, Guobao Li
-
Publication number: 20130090876Abstract: A method for detecting electromagnetic property of oriented silicon steel, the method comprises: measuring Euler angles of each of crystal grains in a specimen by use of metallographic etch-pit method; calculating orientation deviation angle ?i (degree) of the crystal grain; combining area Si (mm2) of the crystal grain and correction coefficient X of element Si (X=0.1˜10 T/degree); correcting on the basis of the magnetic property B0 (saturation magnetic induction, T) of single-crystal material by using these parameters (?i, Si, X), formula for correcting is B 8 = - 0.015 × X × ? n = 1 i ? S i ? ? ? i ? ? n = 1 i ? S i + ( B 0 - 0.04 ) ( 1 ) ; obtaining electromagnetic property B8 of the oriented silicon steel by the above calculations.Type: ApplicationFiled: April 12, 2011Publication date: April 11, 2013Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Meihong Wu, Weizhong Jin, Huande Sun, Guohua Yang, Kanyi Shen, Jie Huang, Guobao Li