Galvanized hot-formed steel components with custom features

A hot forming and component technology, applied in the direction of manufacturing tools, heat treatment furnaces, heat treatment equipment, etc., can solve the problems of damage to the quality and function of custom blank components, softening of welds, etc.

Active Publication Date: 2019-05-31
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, in the subsequent thermoforming process, thermal effects from welding can cause weld changes that can eventually lead to softening at the weld in the finished part, which can potentially compromise the quality and functionality of such custom blank components

Method used

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  • Galvanized hot-formed steel components with custom features
  • Galvanized hot-formed steel components with custom features
  • Galvanized hot-formed steel components with custom features

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] Exemplary embodiments will now be described in more detail with reference to the accompanying drawings.

[0042] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth (eg, examples of specific compositions, components, devices, and methods) in order to provide a thorough understanding of embodiments of the invention. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms, and that neither should be construed to limit the scope of the invention. In some example embodiments, well-known processes, known device structures, and known technologies are not described in detail.

[0043]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 f...

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Abstract

Methods of selectively cooling and quenching surface regions of high-strength transformation induced plasticity (TRIP) steel are provided. The method may comprise selectively cooling at least one region of an exposed surface of a hot-formed press-hardened component comprising a high-strength steel. Prior to selective cooling, the component has a microstructure comprising ≥about 5% by volume retained austenite in a matrix of martensite. The selective cooling is conducted at a temperature of ≤about −40° C. and forms at least one quenched region comprising ≤about 2% by volume austenite. The TRIP steel may be zinc-coated and having a surface coating comprising zinc and substantially free of liquid metal embrittlement (LME). Zinc-coated hot-formed press-hardened components, including automotive components, formed from such methods are also provided.

Description

technical field [0001] The present invention relates to galvanized hot-formed steel components having tailored properties, and methods of selectively tailoring the properties of hot-formed steel components by selective cooling and quenching. Background technique [0002] This section provides background information related to the present invention which is not necessarily prior art. [0003] In various manufacturing processes, such as those in the vehicle industry, sheet metal panels or blanks may be stamped, wherein the sheet metal panels are pressed between a pair of dies to form complex three-dimensionally shaped parts. Sheet metal blanks are usually first cut from coils of metal material. The sheet metal material is selected based on its desired characteristics, such as strength, ductility, and other properties associated with metal alloys. [0004] Different techniques have been employed to reduce the weight of the vehicle while still maintaining structural integrity....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D6/04C22C38/04C22C38/06C22C38/02C22C38/38C22C38/14C22C38/28C22C38/60C22C38/18
CPCC21D1/18C21D6/04C21D2211/001C21D2211/008C22C38/02C22C38/04C22C38/06C22C38/14C22C38/18C22C38/28C22C38/38C22C38/60B32B15/013C21D1/06C21D1/56C21D1/60C21D1/613C21D1/63C21D1/667C21D6/002C21D6/005C21D6/008C21D9/0068C22C38/002C23C2/06
Inventor 王建锋
Owner GM GLOBAL TECH OPERATIONS LLC
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