Controlling Liquid Metal Embrittlement In Galvanized Press-Hardened Components

A technology of pressing hardening and liquid metal, which is applied in the direction of metal material coating process, hot-dip plating process, coating, etc., and can solve effective and other problems

Inactive Publication Date: 2016-07-06
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the indirect method of press hardening is not as effective as the direct method due to the additional steps required

Method used

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  • Controlling Liquid Metal Embrittlement In Galvanized Press-Hardened Components
  • Controlling Liquid Metal Embrittlement In Galvanized Press-Hardened Components
  • Controlling Liquid Metal Embrittlement In Galvanized Press-Hardened Components

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Embodiment Construction

[0066] Specific embodiments are now described more fully with reference to the accompanying drawings.

[0067] The provided exemplary embodiments thoroughly and fully convey the concept of the present invention to those skilled in the art. Numerous specific details are set forth, such as examples of specific compositions, components, devices and methods, in order to provide a thorough understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in different forms and that neither should be construed to limit the scope of the application. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0068] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular fo...

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Abstract

Methods for press hardening galvanized, pre-treated, optionally non-annealed steel alloys are provided. The press-hardened steel alloy may have an ultimate tensile strength (UTS) of at least about 1,000 MPa and is substantially free of liquid metal embrittlement (LME). The press-hardened steel alloy may be further quenched to below room temperature. The press-hardened steel may have a multi-phase microstructure of ferrite at greater than or equal to about 1% to less than or equal to about 60% by volume and a combined volume percentage of martensite, retained austenite, and other transformation products at greater than or equal to about 40% to less than or equal to about 99%.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 62 / 085,081, filed November 26, 2014. The entire disclosure content of the above-mentioned application is incorporated into this application by reference. technical field [0003] The present application relates to a method of press-hardening a steel alloy by galvanizing, pre-treating, optionally without annealing, to form a high-strength press-hardened component which is substantially free of liquid metal embrittlement. Background technique [0004] This section provides background information related to the present disclosure which is not necessarily prior art. [0005] Press hardened steel (PHS), also known as "hot stamped steel", is one of the strongest steels used in automotive body structural applications, with tensile strength properties of approximately 1500 megapascals (MPa). The steel has desirable properties, including forming steel compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C21D6/00
CPCC21D6/005C22C38/02C22C38/04C21D2211/005C21D2211/008C23C2/28C23C2/29C21D8/005C21D6/008
Inventor A·K·萨奇德夫T·W·布朗
Owner GM GLOBAL TECH OPERATIONS LLC
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