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Tailored blank laser welding pre-plated steel plate and hot stamping forming component thereof

A technology of hot stamping and laser tailor welding, which is used in layered products, welding equipment, metal layered products, etc., to improve collision safety.

Active Publication Date: 2021-03-09
IRONOVATION MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] While these two patents no longer require the removal of pre-coated metal alloy layers, they either use a complex laser-torch combination or introduce additional elements to solve the problem

Method used

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  • Tailored blank laser welding pre-plated steel plate and hot stamping forming component thereof
  • Tailored blank laser welding pre-plated steel plate and hot stamping forming component thereof
  • Tailored blank laser welding pre-plated steel plate and hot stamping forming component thereof

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Embodiment Construction

[0061] The present invention will be described in more detail below with reference to exemplary embodiments. The following examples or experimental data are intended to illustrate the present invention, and it should be clear to those skilled in the art that the present invention is not limited to these examples or experimental data. In addition, the descriptions about the contents of chemical elements in the text all refer to percentages by weight.

[0062] The main chemical composition of the matrix steel plate that the present invention adopts is described in detail as follows:

[0063] C: about 0.08wt%~0.45wt%,

[0064]C is the most effective solid solution strengthening element in steel. In order to ensure the tensile strength of the steel is above 1000MPa, the carbon content is required to be greater than or equal to about 0.08wt%. However, if the carbon content exceeds 0.45wt%, its microstructure is mainly brittle high-carbon martensite, its ductility and toughness ar...

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Abstract

The invention relates to a tailored blank laser welding pre-plated steel plate and a hot stamping forming component thereof. The tailored blank laser welding pre-plated steel plate comprises a first pre-plated steel plate, a second pre-plated steel plate and a weld joint between the edges of the first pre-plated steel plate and the second pre-plated steel plate, and the components of the weld joint in percentage by weight enable the complete austenitizing temperature Ae3 of the weld joint in an equilibrium state to meet the following formula:A<e3> = 898-30 * C<Mn-weld>-231 * C<C-weld> + 58 * C<Al-weld><2> + 37 * C<Al-weld><2> + 37 * C<Al-weld>< = 820. The components of the weld joint are controlled by controlling the components and the thickness of baase steel plate and the thickness of apre-plating layer of the base steel plate, so that additional auxiliary means are not needed during laser welding. The weld joint of the hot stamping forming component made of the tailored blank laserwelding pre-plated steel plate has improved performance, and collision safety is improved.

Description

technical field [0001] The present invention relates to a laser tailor-welded pre-coated steel sheet obtained by laser tailor welding and a hot stamping formed member made thereof, wherein the pre-coated steel sheet is a pre-coated steel sheet for hot stamping with an aluminum or aluminum alloy pre-coating . Background technique [0002] In recent years, with the urgent need for energy saving and environmental protection and the improvement of automobile safety requirements, automobile lightweight and safety have become urgent problems to be solved in the automobile manufacturing industry. In order to solve these two problems, more and more technicians are paying attention to ultra-high-strength steel, especially hot stamping steel with aluminum-silicon coating, which has obvious advantages in anti-collision performance and other aspects, and has become a guarantee of safety. And the direction of weight reduction. [0003] In automobile manufacturing, the laser tailor weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/18B23K31/12C22C38/06C22C38/04
CPCB32B15/011B23K31/12C22C38/06C22C38/04B23K2101/185B32B15/012C22C38/58C22C38/54C22C38/02C22C38/44C22C38/48C22C38/50C22C38/46B23K26/0006B23K26/24B23K2101/34B23K2103/04B32B37/0084B32B2310/0843B32B2038/0096
Inventor 易红亮李峥先崔青玲周澍李世宇熊小川王国栋
Owner IRONOVATION MATERIALS TECH CO LTD
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