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A 610mpa grade hot-rolled steel strip for automobile girders

A technology of automobile frame steel and automobile frame, which is applied in the field of steel production, can solve the problems of large internal stress, low cost, and high product cost, and achieve the effects of good dimensional accuracy and plate shape control, moderate cooling speed, and reduced stress unevenness

Active Publication Date: 2021-05-28
LIUZHOU IRON & STEEL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The embodiment of the present invention provides a 610MPa-level hot-rolled steel strip for automobile girders, which can solve the problem that the existing production process of 610MPa-grade hot-rolled steel strips for automobile girders has high requirements for equipment, requires new slow cooling pits, increases investment, and reduces product costs. Higher, the production of hot-rolled steel strips for 610MPa grade automobile beams is prone to problems such as poor shape and large internal stress. The steel strip not only has good plasticity, low temperature toughness, cold formability, fatigue resistance and high strength, but also has high Dimensional accuracy and plate shape, the cost of steel strip products is relatively low, the requirements for production equipment are not high, there is no obvious camber (side bending) after longitudinal cutting, and the steel plate has good comprehensive properties

Method used

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  • A 610mpa grade hot-rolled steel strip for automobile girders
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  • A 610mpa grade hot-rolled steel strip for automobile girders

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Embodiment Construction

[0026]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The embodiment of the present invention provides that the hot-rolled steel strip for the 610MPa grade automobile beam is a low-carbon, niobium-titanium composite component system, and its chemical composition and weight percentage are: carbon C: 0.060~0.090%, silicon Si: 0.10~ 0.20%, Manganese Mn: 1.35~1.50%, Phosphorus P≤0.020%, Sulfur S≤0.008%, Aluminum Als: 0.015~0.050%, Niobium Nb: 0.035~0.045%, Titanium Ti: 0.035~0.045%, Nitrogen N≤ 0.0045%, the bal...

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Abstract

The embodiment of the present invention provides a hot-rolled steel strip for a 610MPa-level automobile frame, the chemical composition and weight percentage of the hot-rolled steel strip for a 610MPa-level automobile frame are: carbon C: 0.060-0.090%, silicon Si : 0.10~0.20%, manganese Mn: 1.35~1.50%, phosphorus P≤0.020%, sulfur S≤0.008%, aluminum Als: 0.015~0.050%, niobium Nb: 0.035~0.045%, titanium Ti: 0.035~0.045%, Nitrogen N≤0.0045%, the balance is Fe and unavoidable impurities.

Description

technical field [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to a 610MPa-level hot-rolled steel strip for automobile girders. Background technique [0002] The frame of a commercial vehicle is usually riveted by beams, longitudinal beams, lining beams, and some reinforcements. The quality of the frame affects the service life and driving safety of the vehicle. Therefore, the steel belt for the automobile frame must have good formability, welding Comprehensive properties such as durability, fatigue resistance and low temperature toughness. With the development of lightweight commercial vehicles, the strength level of the steel belt used for the automobile frame gradually changes from the conventional 510MPa level to 610MPa level, or even 700MPa level. However, as the strength of the steel belt used for the The problem of camber (side bending) is also becoming more and more prominent, which seriously affects the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C33/04B21C37/04C21D8/02
CPCB21C37/04C21D8/0205C22C33/04C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 袁勤攀樊雷杨跃标邓深张金旺李宗强赵忠云叶姜刘崇林梁武三
Owner LIUZHOU IRON & STEEL
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