Patents by Inventor Hongxu Hei
Hongxu Hei 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).
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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
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Patent number: 10385414Abstract: An unoriented silicon steel having high magnetic conductivity and low iron loss at a working magnetic density of 1.0-1.5 T and method for manufacturing same. By proper deoxidation control in a RH refining and high-temperature treatment for a short time in a normalizing step, the method can reduce the amount of inclusions in the silicon steel and improve grain shape, so as to improve the magnetic conductivity and iron loss of the unoriented silicon steel at a magnetic density of 1.0-1.5 T.Type: GrantFiled: March 29, 2012Date of Patent: August 20, 2019Assignee: Baoshan Iron & Steel Co., Ltd.Inventors: Liang Zou, Bo Wang, Xiandong Liu, Aihua Ma, Shishu Xie, Hongxu Hei
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Patent number: 10176910Abstract: The present invention provides a non-oriented silicon steel with excellent magnetic properties and a manufacturing process therefor. During the manufacturing process of the present invention, the temperature T of the molten steel of steel tapped from a converter during steelmaking and the carbon content [C] and the free oxygen content [O] comply with the following formula: 7.27×103?[O][C]e(?5000/T)?2.99×104, and the final annealing step uses tension annealing at a low temperature for a short time. A non-oriented silicon steel with a low iron loss, and excellent anisotropy of iron loss can be obtained by means of the manufacturing process of the present invention.Type: GrantFiled: December 11, 2012Date of Patent: January 8, 2019Assignee: Baoshan Iron & Steel Co., Ltd.Inventors: Shishu Xie, Xiandong Liu, Xiao Chen, Hongxu Hei, Bo Wang, Aihua Ma, Liang Zou, Huawei Zhang, Wei Cao, Feng Zhang, Junliang Liu
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Patent number: 10147528Abstract: A non-oriented electrical steel sheet with fine magnetic performance, and a calcium treatment method therefor, including an RH (Ruhrstahl-Heraeus) refinement step. The RH refinement step sequentially comprises a decarbonization step, an aluminum deoxidation step, and a step of adding calcium alloy. In the step of adding calcium alloy, time when the calcium alloy is added satisfies the following condition: time interval between Al and Ca/total time after ?Al=0.2-0.8. In this method, production cost is reduced, the production process is simple, a normal processing cycle of RH refinement is not affected, the device is convenient in operation and is controllable, and foreign substances are controllable in both shape and quantities. The non-oriented electrical steel sheet prepared according to the present invention has fine magnetic performance, and the method can be used for mass production of the non-oriented electrical steel sheet with fine magnetic performance.Type: GrantFiled: March 27, 2012Date of Patent: December 4, 2018Assignee: Boashan Iron & Steel Co., LTDInventors: Feng Zhang, Xiandong Liu, Shishu Xie, Xuejun Lu, Xiao Chen, Aihua Ma, Peili Zhang, Yanwei Wang, Lan Zhang, Hongxu Hei
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Patent number: 10096415Abstract: Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ?0.005 wt %, P: ?0.2 wt %, S: ?0.005 wt %, N: ?0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: ?10+?13+?15?13982?586.5P15/50; ?10+?13+?15?10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; ?10, ?13, and ?15 is are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.Type: GrantFiled: April 17, 2017Date of Patent: October 9, 2018Assignee: BAOSHAN IRON & STEEL CO., LTDInventors: Aihua Ma, Bo Wang, Xiandong Liu, Liang Zou, Shishu Xie, Hongxu Hei
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Publication number: 20180096767Abstract: Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ?0.005 wt %, P: ?0.2 wt %, S: ?0.005 wt %, N: ?0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: ?10+?13+?15?13982?586.5P15/50; ?10+?13+?15?10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; ?10, ?13, and ?15 is are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.Type: ApplicationFiled: April 17, 2017Publication date: April 5, 2018Inventors: Aihua Ma, Bo Wang, Xiandong Liu, Liang Zou, Shishu Xie, Hongxu Hei
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Patent number: 9822423Abstract: A method for producing a silicon steel normalizing substrate comprises: steelmaking, hot rolling and normalizing steps. The normalizing step uses a normalizing furnace having a nonoxidizing heating furnace section. The nonoxidizing heating furnace section comprises more than 3 furnace zones. An energy investment ratio of the furnace zones used in the nonoxidizing heating furnace section is adjusted, so as to control an excess coefficient ? of the nonoxidizing heating furnace section to be within a range of 0.8??<1.0.Type: GrantFiled: March 26, 2012Date of Patent: November 21, 2017Assignee: Baoshan Iron & Steel, Co., Ltd.Inventors: Hongxu Hei, Bo Wang, Shishu Xie, Xiandong Liu, Guohua Yang, Yongjie Yang, Aihua Ma, Xiaolin Li, Liang Zou, Huawei Zhang
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Patent number: 9738946Abstract: A method for producing a silicon steel normalizing substrate comprises steelmaking, hot rolling and normalizing steps. A normalizing furnace is used in the normalizing step, and along a moving direction of strip steel, the normalizing furnace sequentially comprises: a preheating section, a nonoxidizing heating section, a furnace throat, furnace sections for subsequent normalizing processing, and a delivery seal chamber. Furnace pressures of the normalizing furnace are distributed as follows: the furnace pressure of a downstream furnace section adjacent to the furnace throat along the moving direction of the strip steel is the highest, the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an inlet direction of the normalizing furnace, and the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an outlet direction of the normalizing furnace.Type: GrantFiled: March 27, 2012Date of Patent: August 22, 2017Assignee: Baoshan Iron & Steel, Co., Ltd.Inventors: Hongxu Hei, Xiao Chen, Xiandong Liu, Shishu Xie, Dejun Su, Runjie Lin, Peili Zhang, Rongqiang Jiang, Miao Ye
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Patent number: 9727061Abstract: A method for controlling furnace pressure of a continuous annealing furnace is disclosed.Type: GrantFiled: April 14, 2011Date of Patent: August 8, 2017Assignee: Baoshan Iron & Steel Co., Ltd.Inventors: Yongfeng Liu, Huazhong Gu, Guoqiang Qian, Bin Yin, Dejian Wen, Hongxu Hei, Jun Zhang, Deyang Hu
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Patent number: 9659694Abstract: Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ?0.005 wt %, P: ?0.2 wt %, S: ?0.005 wt %, N: ?0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: ?10+?13+?15?13982?586.5P15/50; ?10+?13+?15?10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; ?10, ?13, and ?15 are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.Type: GrantFiled: March 27, 2012Date of Patent: May 23, 2017Assignee: BAOSHAN IRON & STEEL CO., LTD.Inventors: Aihua Ma, Bo Wang, Xiandong Liu, Liang Zou, Shishu Xie, Hongxu Hei
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Patent number: 9496078Abstract: A hot rolled silicon steel producing method comprises: silicon steel slab heating process, rough rolling process and finish rolling process. The heating process comprises a pre-heating stage, a heating stage and a soaking stage. The pre-heating stage satisfies the following formula (1). In the formula, VTp is a temperature increasing rate, in the pre-heating stage, whose unit is ° C./min; t is a total heating time of the slab in the heating furnace, and t=180-240 min; and Tc is an initial temperature when the slab is put into the furnace, whose unit is ° C. By using the foregoing formula, the heating process and the rough rolling process are changed, an occurrence rate of edge defects during the production of the hot rolled silicon steel can be reduced, and the hot rolled silicon steel with good surface quality can be produced. V Tp > 220 ? ? min t × 100 ? ° ? ? C . T C + 200 ? ° ? ? C . × 25 ? ° ? ? C .Type: GrantFiled: March 29, 2012Date of Patent: November 15, 2016Assignee: Baoshan Iron & Steel Co., Ltd.Inventors: Huawei Zhang, Yaping Wu, Yu Gong, Yezhong Sun, Hongxu Hei
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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
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Publication number: 20150243418Abstract: A hot rolled silicon steel producing method comprises: silicon steel slab heating process, rough rolling process and finish rolling process. The heating process comprises a pre-heating stage, a heating stage and a soaking stage. The pre-heating stage satisfies the following formula (1). In the formula, VTp is a temperature increasing rate, in the pre-heating stage, whose unit is ° C./min; t is a total heating time of the slab in the heating furnace, and t=180-240 min; and Tc is an initial temperature when the slab is put into the furnace, whose unit is ° C. By using the foregoing formula, the heating process and the rough rolling process are changed, an occurrence rate of edge defects during the production of the hot rolled silicon steel can be reduced, and the hot rolled silicon steel with good surface quality can be produced. V Tp > 220 ? ? min t × 100 ? ° ? ? C . T C + 200 ? ° ? ? C . × 25 ? ° ? ? C .Type: ApplicationFiled: March 29, 2012Publication date: August 27, 2015Applicant: Baoshan Iron & Steel Co., Ltd.Inventors: Huawei Zhang, Yaping Wu, Yu Gong, Yezhong Sun, Hongxu Hei
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Publication number: 20150034212Abstract: A non-oriented electrical steel sheet with fine magnetic performance, and a calcium treatment method therefor, including an RH (Ruhrstahl-Heraeus) refinement step. The RH refinement step sequentially comprises a decarbonization step, an aluminum deoxidation step, and a step of adding calcium alloy. In the step of adding calcium alloy, time when the calcium alloy is added satisfies the following condition: time interval between Al and Ca/total time after ?Al=0.2-0.8. In this method, production cost is reduced, the production process is simple, a normal processing cycle of RH refinement is not affected, the device is convenient in operation and is controllable, and foreign substances are controllable in both shape and quantities. The non-oriented electrical steel sheet prepared according to the present invention has fine magnetic performance, and the method can be used for mass production of the non-oriented electrical steel sheet with fine magnetic performance.Type: ApplicationFiled: March 27, 2012Publication date: February 5, 2015Applicant: Baoshan Iron & Steel Co., Ltd.Inventors: Feng Zhang, Xiandong Liu, Shishu Xie, Xuejun Lu, Xiao Chen, Aihua Ma, Peili Zhang, Yanwei Wang, Lan Zhang, Hongxu Hei
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Publication number: 20150013846Abstract: A method for producing a silicon steel normalizing substrate comprises steelmaking, hot rolling and normalizing steps. A normalizing furnace is used in the normalizing step, and along a moving direction of strip steel, the normalizing furnace sequentially comprises: a preheating section, a nonoxidizing heating section, a furnace throat, furnace sections for subsequent normalizing processing, and a delivery seal chamber. Furnace pressures of the normalizing furnace are distributed as follows: the furnace pressure of a downstream furnace section adjacent to the furnace throat along the moving direction of the strip steel is the highest, the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an inlet direction of the normalizing furnace, and the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an outlet direction of the normalizing furnace.Type: ApplicationFiled: March 27, 2012Publication date: January 15, 2015Applicant: Baoshan Iron & Steel Co., Ltd.Inventors: Hongxu Hei, Xiao Chen, Xiandong Liu, Shishu Xie, Dejun Su, Runjie Lin, Peili Zhang, Rongqiang Jiang, Miao Ye
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Publication number: 20150013844Abstract: The present invention provides a non-oriented silicon steel with excellent magnetic properties and a manufacturing process therefor. During the manufacturing process of the present invention, the temperature T of the molten steel of steel tapped from a converter during steelmaking and the carbon content [C] and the free oxygen content [O] comply with the following formula: 7.27×103?[O][C]e(?5000/T)?2.99×104, and the final annealing step uses tension annealing at a low temperature for a short time. A non-oriented silicon steel with a low iron loss, and excellent anisotropy of iron loss can be obtained by means of the manufacturing process of the present invention.Type: ApplicationFiled: December 11, 2012Publication date: January 15, 2015Inventors: Shishu Xie, Xiandong Liu, Xiao Chen, Hongxu Hei, Bo Wang, Aihua Ma, Liang Zou, Huawei Zhang, Wei Cao, Feng Zhang, Junliang Liu
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Publication number: 20150013847Abstract: A method for producing a silicon steel normalizing substrate comprises: steelmaking, hot rolling and normalizing steps. The normalizing step uses a normalizing furnace having a nonoxidizing heating furnace section. The nonoxidizing heating furnace section comprises more than 3 furnace zones. An energy investment ratio of the furnace zones used in the nonoxidizing heating furnace section is adjusted, so as to control an excess coefficient ? of the nonoxidizing heating furnace section to be within a range of 0.8??<1.0.Type: ApplicationFiled: March 26, 2012Publication date: January 15, 2015Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Hongxu Hei, Bo Wang, Shishu Xie, Xiandong Liu, Guohua Yang, Yongjie Yang, Aihua Ma, Xiaolin Li, Liang Zou, Huawei Zhang
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Publication number: 20150000794Abstract: An unoriented silicon steel having high magnetic conductivity and low iron loss at a working magnetic density of 1.0-1.5 T and method for manufacturing same. By proper deoxidation control in a RH refining and high-temperature treatment for a short time in a normalizing step, the method can reduce the amount of inclusions in the silicon steel and improve grain shape, so as to improve the magnetic conductivity and iron loss of the unoriented silicon steel at a magnetic density of 1.0-1.5 T.Type: ApplicationFiled: March 29, 2012Publication date: January 1, 2015Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Liang Zou, Bo Wang, Xiandong Liu, Aihua Ma, Shishu Xie, Hongxu Hei
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Publication number: 20140377124Abstract: Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ?0.005 wt %, P: ?0.2 wt %, S: ?0.005 wt %, N: ?0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: ?10+?13+?15?13982?586.5P15/50; ?10+?13+?15?10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; ?10, ?13, and ?15 are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.Type: ApplicationFiled: March 27, 2012Publication date: December 25, 2014Applicant: BAOSHAN IRON & STEEL CO., LTD.Inventors: Aihua Ma, Bo Wang, Xiandong Liu, Liang Zou, Shishu Xie, Hongxu Hei
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Publication number: 20130304263Abstract: A method for controlling furnace pressure of a continuous annealing furnace is disclosed.Type: ApplicationFiled: April 14, 2011Publication date: November 14, 2013Inventors: Yongfeng Liu, Huazhong Gu, Guoqiang Qian, Bin Yin, Dejian Wen, Hongxu Hei, Jun Zhang