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630 MPa-grade tensile strength hot-rolled steel plate for wheel and manufacturing method thereof

A technology of hot-rolled steel plate and tensile strength, which is applied in the field of hot-rolled automobile structural steel and the manufacture of car wheel spokes, and can solve the problems of low tensile strength, high manufacturing cost, and insufficient wheel fatigue performance

Inactive Publication Date: 2020-03-31
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hot-rolled steel plate for a wheel with a tensile strength of 630MPa and its manufacturing method, which mainly solves the problem of low tensile strength and high manufacturing cost of the existing hot-rolled steel plate for a car wheel. Technical Problems with Insufficient Wheel Fatigue Performance

Method used

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  • 630 MPa-grade tensile strength hot-rolled steel plate for wheel and manufacturing method thereof
  • 630 MPa-grade tensile strength hot-rolled steel plate for wheel and manufacturing method thereof
  • 630 MPa-grade tensile strength hot-rolled steel plate for wheel and manufacturing method thereof

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with Examples 1-3, as shown in Tables 1-3; 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.

[0047] Table 1 Chemical composition of the steel of the embodiment of the present invention, unit: weight percent.

[0048]

[0049] The molten steel that meets the chemical composition requirements is obtained through converter smelting. The molten steel is treated with Ar blowing 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.

[0050] The cut-to-length slab produced by ...

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Abstract

The invention discloses a 630 MPa-grade tensile strength hot-rolled steel plate for a wheel and a manufacturing method thereof. The hot-rolled steel plate and the manufacturing method thereof mainly solve the technical problems that the tensile strength of an existing hot-rolled steel plate for the car wheel is low, the manufacturing cost is high, and the fatigue performance of the wheel is insufficient after the car wheel is manufactured by using the existing hot-rolled steel plate. The hot-rolled steel plate comprises the chemical components of, by weight, 0.05%-0.07% of C, 0.10%-0.15% of Si, 1.25%-1.45% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.025%-0.035% of Nb, 0.045%-0.055% of Ti, 0.0005%-0.0015% of Mg, 0.02%-0.05% of Alt, less than or equal to 0.0040% of N and the balance Fe and inevitable impurities, wherein the content of the elements needs to satisfy the requirement that the carbon equivalent is less than or equal to 0.35%. The hot-rolledsteel plate is mainly used for manufacturing a car spoke.

Description

technical field [0001] The invention relates to a hot-rolled automobile structural steel, in particular to a hot-rolled steel plate for a wheel with a tensile strength of 630MPa and a manufacturing method thereof. The hot-rolled steel plate of the invention is mainly used for manufacturing car wheel spokes 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, a...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14C22C38/06C21D8/02
CPCC21D8/0226C21D2211/005C21D2211/009C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 殷胜王慧娟邓丽琴孙明军陶翀
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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