High-magnetic-strength oriented silicon steel and preparation method thereof
A high magnetic induction oriented, silicon steel technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of difficulty in the production process, reduce the yield of production, increase production costs, etc., to reduce the normalization time and improve the inhibition force. Effect
Active Publication Date: 2020-06-26
武汉钢铁有限公司
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Problems solved by technology
[0020] The above patents all need to adopt the method of secondary cold rolling and nitriding to improve the performance of silicon steel, but the production yield is reduced, the production cost is increased, and the production process is more difficult.
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preparation example Construction
[0052] The above-mentioned preparation method of high magnetic induction oriented silicon steel, the method prepares high magnetic induction oriented silicon steel by hot rolling, normalization, cold rolling, decarburization annealing and coating isolation coating, high temperature annealing and stretching leveling annealing, wherein,
[0053] 1) Hot rolling, low temperature heating and hot rolling, the heating temperature of hot rolling is 1100 ° C ~ 1280 ° C, the final rolling temperature is within the range of 850 ° C ~ 1100 ° C, the thickness of the hot rolled plate is 2.0 ~ 2.8mm, and the plate temperature is ≤ 600 ° C coiled.
[0054] 2) Normalization: heat preservation at 1050°C-1150°C for 30-180s.
[0055] 3) Cold rolling: one-time rolling method is adopted, at least one aging rolling is carried out, the aging temperature is 160-250°C, and the rolling target thickness is 0.30mm.
[0056] 4) Decarburization annealing and isolation coating: the decarburization annealing...
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Abstract
The invention discloses high-magnetic-strength oriented silicon steel and a preparation method thereof. Chemical components of the high-magnetic-strength oriented silicon steel comprise, by weight percent, 0.015%-0.095% of C, 2.80%-3.60% of Si, 0.010%-0.020% of Als, 0.0080%-0.0100% of N, 0.030%-0.150% of Mn, 0.0030%-0.0150% of S one or more kinds in P, Cu, Sb, Sn, Cr, Bi and As and the balance Feand inevitable impurities, and the condition that (P+Cu+Sb+Sn+Cr+Bi+As)<=0.80% is met. By means of the method, the high-magnetic-strength oriented silicon steel is prepared and obtained through hot rolling, normalizing, cold rolling, decarbonization annealing, isolation coating applying, high-temperature annealing and stretching level annealing, it is guaranteed that by means of the finished product performance, an oriented silicon steel plate with the thickness being 0.30 mm, the magnetic induction strength B800 being larger than or equal to 1.935 T and the iron loss P17 / 50 being smaller thanor equal to 1.02W / kg is obtained, and compared with conventional oriented silicon steel performance, B800 is improved by 0.02T, and P17 / 50 is reduced by 0.1 W / kg.
Description
technical field [0001] The invention relates to the technical field of oriented electrical steel production, in particular to a high magnetic induction oriented silicon steel and a preparation method thereof. Background technique [0002] In order to improve the power generation efficiency of large generator sets, a large number of motor manufacturers choose high magnetic induction oriented silicon steel to manufacture stator cells of motors, which can be widely used in large thermal power, nuclear power, wind power and other generator sets. High magnetic induction oriented silicon steel is required in the manufacturing process of the stator core. The performance of this oriented silicon steel needs to meet the standard of the generator set to ensure the performance and mechanical strength of the stator core. [0003] The patent documents related to high magnetic induction grain-oriented silicon steel and its preparation method are mainly consulted as follows: [0004] The ...
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IPC IPC(8): C21D8/12C21D9/00C21D9/52C21D1/26C21D1/68C21D1/74C21D3/04C21D6/00C22C38/04C22C38/06C22C38/20C22C38/34C22C38/60
CPCC21D8/1216C21D9/0081C21D9/52C21D6/005C21D6/008C21D6/002C21D1/26C21D3/04C21D1/74C21D1/68C22C38/34C22C38/04C22C38/06C22C38/001C22C38/002C22C38/20C22C38/008C22C38/60
Inventor 陈博田文洲蒋杰程迪夫杨佳欣付刚丁哲常松申明辉郭小龙
Owner 武汉钢铁有限公司