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Flat steel semi-finished product, method for producing a component, and use thereof

A technology of semi-finished products and flat steel, applied in chemical instruments and methods, layered products, aircraft parts, etc., can solve problems such as component failure, burden, and reduced deformation capacity

Inactive Publication Date: 2019-10-29
THYSSENKRUPP STEEL EURO AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to their chemical and physical properties, steel alloys with an essentially martensitic structure (martensitic phase steels) have only limited coatability, especially for the application of anti-corrosion coatings
Since the deformability decreases with increasing strength, which imposes a burden especially on bending angles, during forming operations, depending on the geometry or complexity to be produced, microcracks / cracks may form in the surface or near-surface regions of the steel , which in the worst case can lead to premature component failure

Method used

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  • Flat steel semi-finished product, method for producing a component, and use thereof

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Embodiment Construction

[0036] The single figure shows a schematic sectional view through a flat steel semi-finished product ( 1 ) according to the invention. The flat steel semi-finished product (1) according to the invention comprises a first layer (1.1) of a steel alloy (martensitic phase steel) with a martensitic structure, with a tensile strength > 1200 MPa and / or a hardness > 370 HV10, especially resistant to Tensile strength>1300MPa and / or hardness>400HV10, preferably tensile strength>1400MPa and / or hardness>435HV10, more preferably tensile strength>1500MPa and / or hardness>465HV10, especially preferred tensile strength>1600MPa and / or hardness> 490HV10, and two second layers (1.2, 1.2') consisting of mild steel alloys with a tensile strength < 600MPa, and / or a hardness < 190HV10, especially a tensile strength < 550MPa and / or a hardness < 175HV10, preferably resistant to With a tensile strength of <450 MPa and / or a hardness of <140 HV10, more preferably a tensile strength of <380 MPa and / or a ha...

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Abstract

The invention relates to a flat steel semi-finished product (1), comprising a first layer (1.1) made of a martensitic steel alloy, which has a tensile strength of > 1200 MPa and / or a hardness of > 370HV10, and at least one second layer (1.2, 1.2') made of a soft steel alloy, which is connected to the first layer (1.1) over the full surface area and in a material-to-material manner, having a tensile strength of < 600 MPa and / or a hardness of < 190 HV10. The invention further relates to a method for producing a component from the flat steel semi-finished product, and to a corresponding use.

Description

technical field [0001] The invention relates to a flat steel semi-finished product comprising a first layer and at least one second layer which is fully and materially connected to the first layer. The invention also relates to a method for producing components from flat steel semi-finished products and the corresponding use. Background technique [0002] The automotive industry is looking for new solutions for reducing vehicle weight and thus fuel consumption. Lightweight construction is an important aspect of being able to reduce vehicle weight. One way to achieve this is to use materials with increased strength. Its ability to bend generally decreases with increasing strength. In addition to ensuring the required occupant protection in crash-related components while achieving increased strength due to lightweight construction, it must be ensured that the materials used are able to transform the energy introduced by the crash through deformation. This requires a high d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01C22C38/00C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18B23K35/30B23K35/02
CPCB21D53/88B21D53/92B23K35/0238B23K35/3053B32B15/011B60N2/0722C21D8/105C21D9/08C21D2211/008C22C38/00C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18B32B2255/06B32B2255/205C22C38/38C22C38/58B22D11/001C22C38/001C22C38/008C22C38/22C22C38/32C23C28/025C23C30/00
Inventor 克里斯蒂娜·马泰
Owner THYSSENKRUPP STEEL EURO AG
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