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Method and system for producing coated steel parts

A technology of coating and parts, applied in the field of steel parts, can solve the problems of reducing the mechanical strength of steel plates, poor adhesion characteristics, affecting other properties of parts, etc., and achieve the effect of excellent process stability and layer stability

Active Publication Date: 2020-01-10
MAGNA INTERNATIONAL INC
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  • Application Information

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Problems solved by technology

[0003] The high temperatures used during hot forming lead to the formation of an oxide layer on the steel sheet which causes scale and corrosion or decarburization of the steel sheet surface, thereby reducing the mechanical strength of the steel sheet and causing increased wear on the forming tools during hot forming
These surface effects also lead to poor adhesion characteristics, making it difficult to paint the resulting parts
Shot peening of hot-formed steel parts removes surface defects, but otherwise requires high levels of energy and may adversely affect other properties of the part

Method used

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  • Method and system for producing coated steel parts
  • Method and system for producing coated steel parts
  • Method and system for producing coated steel parts

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Experimental program
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Effect test

Embodiment approach A1

[0073] The first layer, the adhesion-imparting layer 1, is chosen to be a SiOx1[Ny1][Cz1] compound which ensures optimum adhesion to the steel surface. The first layer is applied by cathodic atomization according to the following parameters:

[0074] Ar=300mln, N2=30mln, O2=80mln;

[0075] P=2.84W / cm2;

[0076] Layer thickness = about 12nm

[0077] (mln = milliliters normal (standard milliliter), P = pressure in W / cm2).

[0078] For the subsequent layer, the diffusion barrier layer 2SiOx2Ny2[Cz2], the process parameter settings are chosen in such a way that a very smooth fine-grained layer structure is obtained, which is very dense and therefore corrosion-resistant:

[0079] Ar=300mln, N2=100mln;

[0080] P=2.84W / cm2;

[0081] Layer thickness = about 20 nm.

[0082] Next, a third layer of SiOx3[Ny3][Cz3] is applied under the following parameters:

[0083] Ar=300mln, N2=50mln, O2=50mln;

[0084] P=2.84W / cm2;

[0085] Layer thickness = about 15 nm.

[0086] It can be s...

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Abstract

A coated steel component is proposed in which a substrate consisting of a steel sheet can be supplied to a hot forming process and has a layered structure of a silicon-based non-metallic coating in which there are three functional layers with the composition SiOxNyCz, where x is 30% to 70%, y from 0% to 35%, z from 0% to 50%.

Description

technical field [0001] The present invention relates to steel parts with silicon-based non-metallic coatings, and to methods and systems for producing coated steel parts using reactive cathodic atomization. Background technique [0002] Motor vehicle components are usually produced by hot forming cold-rolled or hot-rolled steel sheets. Examples of such automotive steel products are pillars, struts, bumpers, rocker panels, fuel tank assemblies, door frames, and components such as automotive door sections. Hot forming is carried out at temperatures above 700°C and generally includes the step of hot-stamping the steel sheet. Hot forming increases the mechanical strength of the steel sheet and improves its other physical properties. [0003] The high temperatures used during hot forming lead to the formation of an oxide layer on the steel sheet that causes scale and corrosion or decarburization of the steel sheet surface, thereby reducing the mechanical strength of the steel s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/02C23C14/06C23C14/08C23C14/10
CPCC21D9/46C23C14/0042C23C14/0652C23C14/0664C23C14/0676C23C14/562C23C14/0036C23C14/10C23C14/022C23C14/3407C23C28/048
Inventor 拉尔夫·多姆尼克马蒂亚斯·贝尔茨纳爱德华·施莱歇特
Owner MAGNA INTERNATIONAL INC
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