Tailored properties by post hot forming processing
A thermoforming, product technology that is used in furnace types, heat treatment furnaces, manufacturing tools, etc. to solve problems such as deformation, reduced tensile strength, and increased component cost and complexity
Inactive Publication Date: 2013-10-02
MAGNA INTERNATIONAL INC
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Problems solved by technology
In addition, Parberg also proposed that the heat generated by welding can cause deformation of the malleable area adjacent to the weld
Unfortunately, the use of highly specialized laser equipment increases the cost and complexity of the part
Furthermore, the method is not well suited for batch processing or for applications requiring the formation of large numbers of regions with reduced tensile strength within the part
Method used
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[0032] The following description is presented to enable any person skilled in the art to make and use the invention, and is presented in the context of a specific application and its needs. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the scope of the invention. Thus, the invention is not intended to be limited to the disclosed embodiments but is to be accorded the widest scope consistent with the principles and properties disclosed herein.
[0033] refer to figure 1 , shows a schematic diagram of a hot forming production line for steel components according to an embodiment of the invention. By way of specific and non-limiting example, in figure 1 The part generated in is the B-pillar for the car. Of course, other types of components can be generated in a similar manner.
[0034] An initial blank 1...
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Abstract
A method of forming a shaped product from an initial blank comprises subjecting the initial blank to a hot forming and press hardening operation to form the shaped product with substantially a uniform first tensile strength. Subsequently, the shaped product is at least partially immersed into a fluidized bed that is maintained within a known range of operating temperatures. While the shaped product is immersed into the fluidized bed, a first region of the shaped product is heated selectively to above a known temperature. The first region is then cooled, such that the first region attains a second tensile strength that is substantially less than the first tensile strength.
Description
technical field [0001] The present invention relates generally to a shaped metal product with tailored properties, and more particularly to a method of creating regions of reduced thickness and reduced strength in a formed metal product via a post-thermoforming process. Background technique [0002] In the field of vehicle construction, vehicle parts made of high-strength and ultra-high-strength steels are increasingly being used in order to meet the specifications for lightweight construction. This is applied in automotive body construction where, in order to meet weight targets and safety needs, UHSS (Ultra High Strength Steel), thermoformed and press hardened steels with tensile strengths greater than 1000Mpa are increasingly being used to produce Structural and / or safety elements such as door impact beams, A and B pillars, bumpers, side and cross rails. [0003] In different applications in automotive engineering, shaped parts will have higher strength in certain areas,...
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IPC IPC(8): C21D8/00B29C43/00C21D1/53B29C71/02
CPCB21D22/022B21D53/88B29C43/003B29C43/52B29C2043/522C21D1/18C21D1/53C21D1/673C21D8/005C21D9/0068C21D2211/008C21D2221/00Y10T428/12458B29C43/00B29C71/02C21D8/00B21D31/00
Inventor 帕斯卡尔·P·查尔斯特尼古拉斯·D·亚当
Owner MAGNA INTERNATIONAL INC