A kind of preparation method of electrical steel for automobile motor
A technology for electrical steel and automobiles, applied in the field of preparation of electrical steel for automotive motors, to achieve the effects of improving the magnetic properties of finished products, good development prospects and potential, and reducing iron loss
Inactive Publication Date: 2016-03-09
SILVER ANHUI FOUNDRY
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Problems solved by technology
At present, domestic electrical steel materials have certain shortcomings, and it is difficult to meet the above requirements at the same time. Therefore, it is urgent to develop an electrical steel for automotive motors with excellent comprehensive performance.
Method used
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Experimental program
Comparison scheme
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Embodiment Construction
[0012] A preparation method for electrical steel for automobile motors, comprising the following steps
[0013] (1) Smelting is carried out according to the clean steel process, and the mass percentage of the final chemical composition of molten steel is controlled to be: C0.001-0.002, Si2.2-3.8, Cr1.8-2.6, Mn0.5-1.5, Als0.4-1.2, Cu0 .2-0.5, Mo0.1-0.3, Bi0.05-0.25, Ti0.04-0.08, Ca0.02-0.06, Te0.005-0.015, Y0.01-0.03, Ho0.005-0.01, N≤0.005 , P≤0.05, S≤0.02, the balance is iron and unavoidable impurities, and continuous casting into a slab with a thickness of 160mm;
[0014] (2) Heat the continuous casting slab at 200°C / h to 360°C, hold for 5 hours, then raise the temperature at 240°C / h to 710°C, hold for 3 hours, then cool down to 450°C at 130°C / h, hold for 4 hours, and then Raise the temperature at 160°C / h to 820°C, hold it for 2 hours, then raise the temperature at 180°C / h to 1140°C, hold it for 2 hours, then carry out continuous rough rolling, and roll it into a rough-rolle...
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Abstract
The invention discloses a preparation method of an electrical steel for an automobile motor. the electrical steel comprises the following chemical components by weight: 0.001-0.002 part of C, 2.2-3.8 parts of Si, 1.8-2.6 parts of Cr, 0.5-1.5 parts of Mn, 0.4-1.2 parts of Als, 0.2-0.5 part of Cu, 0.1-0.3 part of Mo, 0.05-0.25 part of Bi, 0.04-0.08 part of Ti, 0.02-0.06 part of Ca, 0.005-0.015 part of Te, 0.01-0.03 part of Y, 0.005-0.01 part of Ho, no more than 0.005 part of N, no more than 0.05 part of P, no more than 0.02 part of S and the balance of iron and inevitable impurities. Through effective adjustment of chemical components and annealing process, the method provided by the invention not only can reduce the iron loss in heat treatment to improve magnetic performance of a finished product, but also can improve tissue structure of the sheet plate and significantly improve the strength and formability of steel plate. The electrical steel prepared in the invention has the characteristics of high magnetic induction, low loss, high strength, fatigue resistance and good stamping processing performance, and has good development prospect and potential.
Description
technical field [0001] The invention relates to a method for preparing electrical steel for automobile motors, belonging to the technical field of metal material processing and forming. Background technique [0002] With the rapid development of my country's automobile industry and the high-frequency development of automobile motors, the comprehensive performance requirements for electrical steel used in motor cores are getting higher and higher, not only requiring good strength, toughness and processing performance, but also having High magnetic induction and low iron loss. At present, domestic electrical steel materials have certain shortcomings, and it is difficult to meet the above requirements at the same time. Therefore, it is urgent to develop an electrical steel for automotive motors with excellent comprehensive performance. Contents of the invention [0003] The object of the present invention is to provide a method for preparing electrical steel for automobile mo...
Claims
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IPC IPC(8): C22C33/04C22C38/60C21D8/00C21D1/26
Inventor 谷和文丁思潮
Owner SILVER ANHUI FOUNDRY