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Hot-rolled steel sheet for automobile wheels with tensile strength of 590 MPa

A technology of tensile strength and hot-rolled steel plate, which is applied in the field of steel for automobile wheels, can solve the problems of insufficient wheel fatigue performance, high manufacturing cost, and low tensile strength, and achieve good fatigue performance and welding performance, low cost, high Effects of Strength and Elongation

Inactive Publication Date: 2019-01-01
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 kind of hot-rolled steel plate for automobile wheel with a tensile strength of 590MPa and its manufacturing method, to solve the problem of low tensile strength and high manufacturing cost of the existing hot-rolled steel plate for automobile wheel Technical Problems with Insufficient Wheel Fatigue Performance

Method used

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  • Hot-rolled steel sheet for automobile wheels with tensile strength of 590 MPa
  • Hot-rolled steel sheet for automobile wheels with tensile strength of 590 MPa
  • Hot-rolled steel sheet for automobile wheels with tensile strength of 590 MPa

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with Examples 1-3, as shown in Tables 1-3.

[0043] Table 1 is the chemical composition (by weight percentage) of the steel of the embodiment of the present invention, and the balance is Fe and unavoidable impurities.

[0044] Table 1 Chemical composition of the steel of the embodiment of the present invention, unit: weight percent.

[0045]

[0046] The molten steel that meets the chemical composition requirements is obtained through converter smelting. The molten steel is blown by Ar in the refining process of the LF ladle refining furnace. The RH furnace is subjected to vacuum cycle degassing treatment and fine-tuning of the composition, and then the continuous casting of slabs is carried out to obtain continuous casting slabs; continuous casting slabs The thickness of the billet is 210-230mm, the width is 900-1600mm, and the length is 8500-11000mm.

[0047] The cut-to-length slab produced by st...

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Abstract

The invention relates to a hot-rolled steel sheet for automobile wheels with tensile strength of 590MPa, which solves the technical problem that the existing hot-rolled steel sheet for automobile wheels has low tensile strength and insufficient fatigue performance of the wheel after the automobile wheel is produced by the existing steel sheet. The hot-rolled steel sheet for automobile wheels withtensile strength of 590 MPa provided by the invention has a chemical composition weight percentage: 0.07% to 0.09% of C, 0.05% to 0.10% of Si, 1.15% to 1.35% of Mn, less than or equal to 0.012% of P,less than or equal to 0.003% of S, 0.02% to 0.03% of Nb, 0.035% to 0.055% of Ti, 0.0005% to 0.0015% of Mg, 0.02% to 0.05% of Alt, less than or equal to 0.0040% of N, and the balance being Fe and unavoidable impurities. The hot-rolled steel sheet is mainly used for making automobile wheel rims and spokes.

Description

technical field [0001] The invention relates to a steel for automobile wheels, in particular to a hot-rolled steel plate for automobile wheels with a tensile strength of 590 MPa and a manufacturing method thereof. The hot-rolled steel plate is mainly used for manufacturing car wheels 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 self-weight is an important way for many automobile manufacturers to meet the requirements of emission regulations. As a hot-rolled steel plate for wheels, it also faces the development requirements of high strength and thinning. At present, most of the automotive structural steels specially used for automotive wheels have low strength levels. Most of the wheels are made of wheel steel with a tensile strength of 380MPa or 490MPa. The maximum tensile stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/14C22C38/02C22C38/12C22C38/06C21D8/02
CPCC21D8/0226C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 殷胜邓丽琴孙明军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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