Production method of high-strength automobile hub steel

A technology of automobile wheel hub and production method, which is applied in the direction of manufacturing converters, etc., can solve the problems of increasing the weight of the automobile and increasing the thickness of the steel plate, and achieve the effect of high cost performance, good cold stamping performance, and low cost

Inactive Publication Date: 2017-02-15
XINJIANG BAYI IRON & STEEL
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AI Technical Summary

Problems solved by technology

Due to the low strength, the thickness of the steel plate used to manufactur

Method used

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Example Embodiment

[0023] A method for producing high-strength automobile wheel steel, which adopts converter smelting-LF refining-hot continuous rolling process to produce automobile wheel steel with a steel strip thickness of 2.0mm~5.0mm; the composition of the steel strip is in weight percentage: [C ]: 0.065~0.085%; [Si]: ≤0.08%; [Mn]: 0.85~0.95%; [P]: ≤0.018%; [S]: ≤0.003%; [Al]: 0.025~0.040%; [ Ti]: 0.020~0.030%; [Ca]: 0.0020~0.0030%; [N]: ≤0.0050%, iron and inevitable impurities; control of key points in the production process:

[0024] 1) The key control points of converter smelting: composition and temperature control requirements, the molten iron containing [S]≦0.005% after hot metal desulfurization pretreatment is added to the top and bottom combined blown converter for oxygen blowing, and the end point [C] content of the converter is 0.04~0.06% , [P] content is not more than 0.012%, [N] ≤0.0020%, converter tapping temperature is controlled at 1630~1670℃, ladle molten steel after tapping ...

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Abstract

The invention discloses a production method of high-strength automobile hub steel. According to the production method of the high-strength automobile hub steel, a technology comprising converter smelting, LF refining and hot continuous rolling is adopted to produce the automobile hub steel, wherein the thickness of the steel belt of the automobile hub steel is 2.0-5.0 mm. The steel belt is composed of, by weight, 0.065%-0.085% of C, not larger than 0.08% of Si, 0.85%-0.95% of Mn, not larger than 0.018% of P, not larger than 0.003% of S, 0.025%-0.040% of Al, 0.020%-0.030% of Ti, 0.0020%-0.0030% of Ca, not larger than 0.0050% of N, iron and inevitable impurities. By the adoption of the production method of the high-strength automobile hub steel, through the control over the plate blank heating temperature, the rough rolling temperature, the thickness of a roughly rolled intermediate blank, the precise rolling starting rolling temperature, the rolling speed, the precise rolling finishing rolling temperature, the steel coil coiling temperature and the laminar cooling schedule in the rolling process, the high-strength low-yield-ratio automobile hub steel is produced in the absence of niobium and vanadium micro-alloy elements in the presence of only trace titanium.

Description

technical field [0001] The invention relates to a production method of high-strength automobile hub steel. Background technique [0002] The wheel is an important part of the car, its structure, performance and weight directly affect the technical performance of the vehicle. In the field of automobile hub steel, increasing the strength of materials, reducing the weight of the wheel, and reducing the fuel consumption of automobiles represent the development direction of automobile hub steel. At present, the commonly used automobile wheel steels are QStE380TM, SAPH400, SAPH440 and other brands. Due to the low strength, the thickness of the steel plate used to manufacture the wheel hub increases accordingly, which increases the weight of the car. Therefore, in order to reduce the self-weight of automobiles, it is an inevitable trend for the future development of automobile wheel hub steel to adopt new materials or increase the strength of steel plates to reduce the self-weigh...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/14C21C5/35C21C7/072C21D8/02
CPCC21C5/35C21C7/072C21D8/0226C21D8/0263C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 吾塔赵亮张爱梅张建新陈勇雷洪鲁军郭庆华
Owner XINJIANG BAYI IRON & STEEL
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