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High-Al electrical steel square billet for automobile generator pole claw and production method of high-Al electrical steel square billet

A technology of an automobile generator and a production method, which is applied in the metallurgical field, can solve the problems of clogging a nozzle by inclusions, poor surface quality of a steel billet, etc., and achieves the effects of reducing the magnetic resistance, satisfying the power generation, and having a good use effect.

Active Publication Date: 2017-12-12
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, high Al electrical steel is easy to use slab to produce, but the billet process will face the Al in high Al content steel. 2 o 3 Inclusions block the nozzle, and mold mold slag denatures, resulting in poor billet surface quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical composition and mass percentage of the high Al electrical steel billet used for the pole claw of the automobile generator in this example are: C: 0.010%, Si: 0.10%, Mn: 0.10%, P: 0.010%, S: 0.010%, Alt : 0.40%, the rest is Fe and unavoidable impurities.

[0025] The production method of the high-Al electrical steel billet for the pole claw of the automobile generator in this embodiment includes molten iron pretreatment, converter smelting, LF furnace, RH furnace, continuous casting, and billet opening processes. The specific process steps are as follows:

[0026] (1) Hot metal pretreatment process: use blast furnace for hot metal pretreatment desulfurization, hot metal S: 0.006%;

[0027] (2) Converter smelting process: In the early stage of converter smelting, the slag dumping process is adopted, and in the later stage, high-drawing supplementary blowing is used, and the tapping C: 0.05%; 600ppm; add 90kg aluminum block for deoxidation;

[0028] (3) LF f...

Embodiment 2

[0033] The chemical composition and mass percentage of the high Al electrical steel billet used for the pole claw of the automobile generator in this example are: C: 0.006%, Si: 0.02%, Mn: 0.060%, P: 0.008%, S: 0.006%, Alt : 0.30%, the rest is Fe and unavoidable impurities.

[0034] The production method of the high-Al electrical steel billet for the pole claw of the automobile generator in this embodiment includes molten iron pretreatment, converter smelting, LF furnace, RH furnace, continuous casting, and billet opening processes. The specific process steps are as follows:

[0035] (1) Hot metal pretreatment process: use blast furnace for hot metal pretreatment desulfurization, hot metal S: 0.006%;

[0036] (2) Converter smelting process: In the early stage of converter smelting, the slag dumping process is adopted, and in the later stage, high-drawing supplementary blowing is used, and the tapping C: 0.04%; the temperature of the molten steel is 1610°C, and the sliding plat...

Embodiment 3

[0042] The chemical composition and mass percentage of the high Al electrical steel billet used for the pole claw of the automobile generator in this example are: C: 0.005%, Si: 0.03%, Mn: 0.06%, P: 0.008%, S: 0.007%, Alt : 0.35%, the rest is Fe and unavoidable impurities.

[0043] The production method of the high-Al electrical steel billet for the pole claw of the automobile generator in this embodiment includes molten iron pretreatment, converter smelting, LF furnace, RH furnace, continuous casting, and billet opening processes. The specific process steps are as follows:

[0044] (1) Hot metal pretreatment process: use blast furnace for hot metal pretreatment desulfurization, hot metal S: 0.005%;

[0045] (2) Converter smelting process: In the early stage of converter smelting, the slag dumping process is adopted, and in the later stage, high-drawing supplementary blowing is used. The tapping C: 0.03%; the temperature of the molten steel is 1615°C, and the sliding plate is ...

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Abstract

The invention discloses a high-Al electrical steel square billet for an automobile generator pole claw and a production method of the high-Al electrical steel square billet. The electrical steel square billet comprises chemical components including, by mass, 0-0.010% of C, 0-0.10% of Si, 0-0.10% of Mn, 0-0.010% of P, 0-0.010% of S, 0.30%-0.40% of Alt and the balance Fe and inevitable impurities. The production method comprises the steps of molten iron pretreatment, converter smelting, LF furnace treatment, RH furnace treatment, continuous casting and cogging. A small square billet product produced through the production method is stable and uniform in component and small in impurity element amount, and production requirements of users for the automobile generator pole claw for export are met; and through the product, the generating capacity can be improved by 5%-8%, meanwhile, the overall thickness of the pole claw can be decreased by 0.5 mm, the magnetic resistance is effectively reduced, a remarkable effect on dynamic balance and light weight is achieved, the quality requirements for stable generating capacity and low noise of the export generator pole claw can be met, and the using effect is great.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a high-Al electrical steel billet for pole claws of automobile generators and a production method thereof. Background technique [0002] The pole claw is used in the rotor of the automobile alternator excitation, and its function is to conduct the magnetic field. The pole claws of automotive brushless generators are generally made of cast steel or seamless stainless steel pipes. However, due to the unstable composition of cast steel or stainless steel or the large number of impurity elements, the ferromagnetic properties will be unstable and the magnetic resistance will be large. , the power generation is low, and at the same time, it affects the correction of dynamic balance. With the advancement of automobile technology, the number of electrical equipment on the car is increasing, the power consumption is getting higher and higher, and the noise is also increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/02C22C38/04C22C33/04C21C1/02C21C5/28C21C7/068C21C7/10B22D11/111B22D11/16
Inventor 戴永刚刘宏伟田新中张治广刘振民郭明仪李宝秀田景广王秋坤宋云霞孔维涛吴志远刘会杰赵然阎丽珍翟进坡秦树超
Owner XINGTAI IRON & STEEL
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