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Automobile component steel and preparation method thereof and automobile component

A component and automobile technology, which is applied in the field of automobile component production, automobile component steel and its preparation, and can solve the problem of low fatigue performance of torsion beams

Active Publication Date: 2020-08-11
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides an automobile component and its preparation method to solve the problem of low fatigue performance of automobile torsion beams in the prior art

Method used

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  • Automobile component steel and preparation method thereof and automobile component

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Embodiment 1

[0054] Embodiment 1 provides a method for preparing automobile component steel. After the molten iron is pretreated, the molten steel is obtained through converter smelting, LF refining, and RH refining, and then continuous casting is performed to obtain a slab with the composition in Table 1; after the slab is heated, After rough rolling, finish rolling and coiling, automobile component steel is obtained. Among them, the end temperature of rough rolling is 1080°C, constant rolling is used for finishing rolling, the rolling rate is 6m / s, the end temperature of finish rolling is 880°C, and the cooling mode is adopted in the front stage laminar flow cooling, and the cooling rate is 35°C / s , the coiling temperature is 430°C, and the thickness of the automobile component steel is 1.8mm; the automobile component steel is obtained after smoothing, pickling and stamping. The microstructure of automobile components is about 95% granular bainite and about 5% ferrite. After the structu...

Embodiment 2

[0056] Embodiment 2 provides a method for preparing automobile component steel. After the molten iron is pretreated, the slab with the composition in Table 1 is obtained by continuous casting after converter smelting, LF refining, and RH refining; after the slab is heated, it is subjected to rough rolling, Finish rolling and coiling to obtain automotive component steel. Among them, the finishing temperature of rough rolling is 1100°C, constant rolling is adopted for finishing rolling, the rolling speed is 8m / s, the finishing temperature is 885°C, and the cooling mode of front stage laminar flow is used for cooling, and the cooling rate is 42°C / s , the coiling temperature is 450°C, and the thickness of the automobile component steel is 3.0mm; the automobile component steel is obtained after smoothing, pickling and stamping. The microstructure of automobile components is about 98% granular bainite and about 2% ferrite. After the component is annealed at 680°C for 25 minutes, th...

Embodiment 3

[0058] Embodiment 3 provides a method for preparing automobile component steel. After the molten iron is pretreated, it is subjected to converter smelting, LF refining, and RH refining to obtain a slab with the composition in Table 1; after the slab is heated, it undergoes rough rolling, Finish rolling and coiling to obtain automotive component steel. Among them, the rough rolling end temperature is 1050°C, constant rolling is used for finishing rolling, the rolling speed is 10m / s, the finish rolling end temperature is 860°C, and the front laminar cooling mode is used for cooling, and the cooling rate is 50°C / s , the coiling temperature is 480°C, and the thickness of the automobile component steel is 1.8mm; the automobile structural parts are obtained after the automobile component steel is flattened, pickled and stamped. The microstructure of automotive structural parts is about 97% granular bainite and about 3% ferrite. After the structural parts are annealed at 570°C for 3...

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Abstract

The invention discloses automobile component steel and a preparation method thereof, and an automobile component. The automobile component steel is made from the following chemical components: by mass, 0.03-0.20% of C, not more than 0.1% of Si, 0.8-2.0% of Mn, not more than 0.02% of P, not more than 0.005% of S, 0.05-0.1% of Al, 0.03-0.15% of V, 0.06-0.025% of N, and the balance of Fe and inevitable impurities. The automobile component prepared by the method is long in fatigue life and low in cost, the method is simple and popularization is easy.

Description

technical field [0001] The invention belongs to the technical field of automobile component production, and in particular relates to an automobile component steel, a preparation method thereof, and an automobile component. Background technique [0002] The automobile torsion beam is a kind of automobile component, which is a part of the non-independent suspension of a compact passenger car. The wheels on both sides are mounted on a torsion beam, and the torsion beam is connected to the frame through elastic elements. When the car is running on an uneven road, the torsion beam not only bears the longitudinal force transmitted by the wheels, but also bears the alternating displacement load in the vertical direction. [0003] The automobile torsion beam has a simple structure, but in the prior art, it still has the disadvantages of high stress level and low fatigue performance. Contents of the invention [0004] Aiming at the deficiencies of the above prior art, the present ...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C38/06C22C38/04C22C38/02C21D1/26
CPCC21D1/26C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 郭子峰张衍李秋寒郭佳冯军陈斌牛涛武巧玲白凤霞刘阳春李玉鹏吕宝锋赵青范然然杨业周娜徐伟张嘉琪宋春华陈波王伦
Owner SHOUGANG CORPORATION
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