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High-strength steel for automotive wheels and manufacture method thereof

A wheel and automobile technology, applied in the field of high-strength stamping steel, can solve the problems of low strength, high production cost, fatigue performance of steel plate thickness, etc., and achieve the effect of high fatigue performance, high stamping performance and low alloying cost

Inactive Publication Date: 2010-09-15
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for manufacturing high-strength automobile wheel steel, which solves the problems of low strength, thick steel plate, poor fatigue performance and high production cost of current domestic wheel steel, and reduces the weight of the vehicle body. Reduce fuel consumption and save energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the production process of high-strength automobile wheel steel, wheel steel No. 1 was trial-manufactured on site.

[0020] The smelting process is as follows: firstly carry out pretreatment and desulfurization of molten iron, then carry out converter smelting, the target temperature at the end point is 1660°C, use Al-Fe alloy for deoxidation, the amount of Al added is 2kg / t, use Mn-Fe alloy with Mn, and add aluminum after tapping Deoxidize the slag with 1.2kg / t of Al; the next step is LF furnace refining treatment, maintaining a reducing atmosphere in the furnace, strong stirring for desulfurization, using Mn-Fe to adjust Mn, using Si-Fe to adjust Si, and the refining end temperature The temperature is controlled at 1560°C, a reducing atmosphere is maintained in the furnace, and desulfurization is carried out by strong stirring; the last stage is the continuous casting stage, which is fully protected by argon, and the liquid level of the crystallizer fluctua...

Embodiment 2

[0033] According to the production process of high-strength automobile wheel steel, wheel steel No. 2 was trial-manufactured on site.

[0034] The smelting process is as follows: firstly carry out pretreatment desulfurization of molten iron, then carry out converter smelting, the target temperature at the end point is 1670°C, use Al-Fe alloy for deoxidation, the amount of Al added is 2kg / t, use Mn-Fe alloy with Mn, and add aluminum after tapping Deoxidize the slag with 1.2kg / t of Al; the next step is LF furnace refining treatment, maintaining a reducing atmosphere in the furnace, strong stirring for desulfurization, using Mn-Fe to adjust Mn, using Si-Fe to adjust Si, and the refining end temperature The temperature is controlled at 1570°C, a reducing atmosphere is maintained in the furnace, and desulfurization is carried out by strong stirring; the last stage is the continuous casting stage, which is fully protected by argon gas, and the liquid level of the crystallizer fluctua...

example 3

[0046] According to the production process of high-strength automobile wheel steel, wheel steel No. 3 was trial-manufactured on site.

[0047] The smelting process is as follows: firstly carry out pretreatment desulfurization of molten iron, and then carry out converter smelting, the target temperature at the end point is 1680°C, use Al-Fe alloy for deoxidation, the amount of Al added is 2kg / t, use Mn-Fe alloy with Mn, and add aluminum after tapping Deoxidize the slag with 1.2kg / t of Al; the next step is LF furnace refining treatment, maintaining a reducing atmosphere in the furnace, strong stirring for desulfurization, using Mn-Fe to adjust Mn, using Si-Fe to adjust Si, and the refining end temperature The temperature is controlled at 1580°C, the reducing atmosphere is maintained in the furnace, and the desulfurization is carried out by strong stirring; the last is the continuous casting stage, which is fully protected by argon, and the liquid level of the crystallizer fluctua...

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Abstract

The invention relates to high-strength steel for automotive wheels and a manufacture method thereof, belonging to the technical field of high-strength stamping steel. The steel for automotive wheels comprises the following components in percentage by weight: 0.07-0.12 percent of C, 0.01-0.1 percent of Si, 1.0-1.2 percent of Mn, 0.008-0.015 percent of P, not more than 0.008 of S, 0.020-0.040 percent of Al and the balance of Fe and other impurity elements. The manufacture method has the processes of: molten iron preprocessing for desulfurization, processing by a top-and-bottom combined blown converter, refining treatment by an LF furnace, continuous casting of plate blanks, thermal rolling and finished product obtaining. Compared with traditional steel for wheels, the invention has the advantages that the tensile strength can reach 380-480 MPa, and the elongation rate is 26.0-43.0 percent under the condition that noble metals, such as Nb, and the like are not added. The steel plate with high strength, high fatigue resistance and high stamping performance can be obtained with low alloying cost to effectively lighten the self weight of an automobile and reduce the oil consumption; and therefore, the high-strength steel is an ideal steel plate for producing automobile wheel rims and spokes.

Description

technical field [0001] The invention belongs to the technical field of steel for high-strength stamping, and in particular provides a method for manufacturing high-strength steel for automobile wheels. Background technique [0002] In recent years, with the vigorous development of the domestic automobile industry, the automobile wheel industry has also developed rapidly in terms of material and structure. In order to make my country's automobile industry develop independently, reduce the quantity of steel imported from abroad, and on the basis of ensuring the strength and rigidity of the steel and reducing the weight of the vehicle, conduct series and special research on steel for wheels to meet the urgent needs of the automobile industry. is an urgent task at present. [0003] At present, domestic wheel steel generally uses hot-rolled coils such as Q235B, which have low strength, poor fatigue performance, and thick and heavy steel plates. However, in recent years, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21C7/064C21C5/30B22D11/16B21B1/46
Inventor 周志伟赵林崔阳张鹏程徐海卫李飞李明朱国森武军宽包春林周德光
Owner SHOUGANG CORPORATION
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