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Hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims

A 580mpa, tensile strength technology, applied in the field of hot-rolled dual-phase steel plates for automobile rims with a tensile strength of 580Mpa, can solve the problems of low tensile strength, high manufacturing cost, insufficient wheel fatigue performance, etc., and achieve good processing performance. Effect

Inactive Publication Date: 2019-05-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hot-rolled dual-phase steel plate for automobile wheel rims with a tensile strength of 580Mpa and its manufacturing method, which mainly solves the problem of low tensile strength and high manufacturing cost of existing hot-rolled steel plates for automobile wheels. Technical problem of insufficient wheel fatigue performance behind the car wheel

Method used

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  • Hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims
  • Hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims
  • Hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with Examples 1 to 3, as shown in Tables 1 to 3.

[0048] Table 1 shows the chemical composition (by weight percentage) of the steel in the example of the present invention, and the balance is Fe and unavoidable impurities.

[0049] Table 1 Chemical composition of the steel in the example of the present invention, unit: weight percentage.

[0050]

[0051] The molten steel that meets the chemical composition requirements is obtained through converter smelting, and the molten steel is blown with Ar in the refining process of the LF ladle refining furnace, and the RH furnace is subjected to vacuum cycle degassing treatment and composition fine-tuning, and then the slab continuous casting is performed to obtain the continuous casting slab; The thickness of the blank is 210-230mm, the width is 900-1600mm, and the length is 8500-11000mm.

[0052] The cut-to-length slab produced by steelmaking is sent to the heating...

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Abstract

The invention discloses a hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims. The technical problems of cracking and necking of an existing hot-rolled steel plate for automobile wheels after welding and poor fatigue performance of finished products are solved. The hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims is prepared from, by weight, 0.06%-0.08% of C, 0.05%-0.13% of Si, 1.1%-1.3% of Mn, greater than or equal to 0.035% but smaller than or equal to 0.045% of P, less than or equal to 0.003% of S, 0.5%-0.6% of Cr, 0.015%-0.025% of Ti, 0.0005%-0.00015% of Mg, 0.02%-0.05% of Alt, less than or equal to 0.0040% of N, and the balance Fe and inevitable impurities, specifically, Mn / Si is 5-30. The hot-rolled biphase steel plate is mainly applied to manufacturing car rims.

Description

Technical field [0001] The invention relates to a hot-rolled dual-phase steel, in particular to a hot-rolled dual-phase steel sheet for automobile rims with a tensile strength of 580Mpa and a manufacturing method thereof, and in particular to a flash welding process for manufacturing automobile rims with tensile strength 580Mpa-class hot-rolled dual-phase steel sheet for automobile rims and a manufacturing method thereof. The hot-rolled dual-phase steel sheet of the present invention is mainly used for manufacturing car rims and belongs to the technical field of iron-based alloys. Background technique [0002] With the increasing requirements of automobile safety performance and emission regulations, the use of high-strength steel to reduce the cost of the vehicle's own weight is an important way for many automobile manufacturers to meet the requirements of emission regulations. At present, most of the hot-rolled dual-phase steels for automobile wheels are used for spokes, and th...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/28C21D8/02
Inventor 殷胜邓丽琴孙明军陶翀
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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