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A kind of high Al electrical steel square billet for pole claw of automobile generator and its production method

A technology of automobile generator and production method, applied in the field of metallurgy, can solve the problems of clogging of nozzles by inclusions, poor surface quality of steel billets, etc., and achieve the effects of reducing magnetic resistance, satisfying power generation, and reducing impurity elements.

Active Publication Date: 2019-10-18
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 claws of the automobile generator in this embodiment are: C: 0.010%, Si: 0.10%, Mn: 0.10%, P: 0.010%, S: 0.010%, Alt : 0.40%, the rest is Fe and inevitable impurities.

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

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

[0027] (2) Converter smelting process: the converter smelting adopts the slag dumping process in the early stage, and adopts high-stretching supplementary blowing in the later stage, the tapping C: 0.05%; the molten steel temperature is 1620℃, the molten steel tapping adopts a slidin...

Embodiment 2

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

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

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

[0036] (2) Converter smelting process: The converter smelting adopts the slag dumping process in the early stage, and the high-stretch supplementary blowing is adopted in the later stage. The tapping C: 0.04%; the molten steel temperature is 1610℃, and the molten steel tappin...

Embodiment 3

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

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

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

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

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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 specifically relates to a high-Al electrical steel billet for pole claws of an automobile generator and a production method thereof. Background technique [0002] The pole claw is used in the rotor of the automobile alternator excitation, and the function plays a role of magnetism. The pole claws of automobile 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 more impurity elements, it will cause unstable ferromagnetic performance and large magnetic resistance. , The power generation is low, and it also 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 increasing. As the ride comfort increases and the requi...

Claims

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Application Information

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Patent Type & Authority Patents(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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