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Sheet steel product, a steel component produced from such a sheet steel product, and body for a motor vehicle

A technology of products and flat steel, applied in the direction of layered products, metal layered products, chemical instruments and methods, etc., can solve problems such as limitations, and achieve the effects of high energy absorption, delaying fracture formation, and delaying fracture induction

Inactive Publication Date: 2016-08-03
THYSSENKRUPP STEEL EURO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this prior art is limited to the use of conventional steel as the material of the core layer, and its strength range does not exceed 1500MPa

Method used

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  • Sheet steel product, a steel component produced from such a sheet steel product, and body for a motor vehicle
  • Sheet steel product, a steel component produced from such a sheet steel product, and body for a motor vehicle
  • Sheet steel product, a steel component produced from such a sheet steel product, and body for a motor vehicle

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Embodiment Construction

[0067] Flat steel products V1, V2, V3, V3 constructed in composite material are produced by the roll cladding method from commercially available flat steel products A1-A4 and K1-K4 produced in a conventional manner * , V4 * , V4, V5, V5 * , V6, V7, V7 * and V8. The corresponding composition of the flat steel products A1-A4 consisting of mild steel and the composition of the flat steel products K1-K4 consisting of high-strength steel is specified in Table 1.

[0068] It can be seen in Table 2 which flat steel products A1-K4 constitute the corresponding core layer KL; which products constitute the corresponding outer layer AL; and the thickness of the core layer KL in each composite material-flat steel product V1-V8 What is the ratio of A-KL on it. The ranges of the tensile strength Rm determined for the respective press-hardened components of the composite material flat steel products V1-V8 are additionally given in Table 2.

[0069] For rolling the cladding, the metal sla...

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Abstract

The invention relates to a sheet steel product which is particularly suitable for producing components for motor vehicle bodies by a press-hardening process. The sheet steel product is resistant against the formation of cracks and has a sufficient welding capability so as to be integrated into a welded structure while having an improved strength. According to the invention, this combination of properties is achieved in that the flat sheet steel product has a core layer, which consists of a steel that is alloyed with Mn, B, and at least 0.3 wt.% of C and has a tensile strength of more than 1500 MPa, and a top layer that is bonded to the core layer. The C content of the top layer is maximally 0.09 wt.%. In the region of the top layer, the sheet steel product has a tensile strength that maximally corresponds to half of the tensile strength of the steel of the core layer in the completely hardened state, the elongation A80 of the top layer at least corresponding to 1.5 times the elongation A80 of the core layer in the completely hardened state.

Description

technical field [0001] The invention relates to a steel for the production of steel components, a flat steel product consisting at least in sections of this steel, a steel component produced from such a flat steel product by hot forming and quenching, and a steel component made of such a steel body made of components. Background technique [0002] The term "flat steel product" is understood here to mean steel sheets or steel strips produced by a rolling process as well as slabs divided into sheets or steel strips and the like. [0003] Although the alloy content is stated here only in "%", unless otherwise specified, "% by weight" is always referred to here. [0004] The demands placed on the safety of passengers in the event of a crash in the field of automobile construction are constantly increasing. At the same time the lightweight construction is also essential for compliance with the statutory CO 2 Limit values ​​and prerequisites that are important for minimizing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01C22C38/00C22C38/02C22C38/04C22C38/06C22C38/26C22C38/28C22C38/32C22C38/38
CPCC22C38/004C22C38/02C22C38/04C22C38/06C22C38/26C22C38/28C22C38/32C22C38/38B32B15/011C22C38/002C22C38/50C22C38/54
Inventor 延斯-乌尔里克·贝克尔托马斯·格伯尤利娅·穆拉斯特凡·米斯洛维奇
Owner THYSSENKRUPP STEEL EURO AG
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