High temperature resistant zinc-based coated steel sheet and its manufacturing method, hot forming method and parts

A coated steel plate, high temperature resistance technology, applied in forming tools, manufacturing tools, coatings, etc., can solve the problems of liquid phase erosion and easy evaporation of pure zinc coating

Active Publication Date: 2022-03-22
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned defects, the present invention provides a high-temperature-resistant zinc-based coated steel plate and its manufacturing method, hot forming method and components, which have the protective effect of pure zinc coating on the steel plate, and at the same time solve the problem of liquid phase corrosion of pure zinc coating and easy Disadvantages such as evaporation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The coating is a hot-pressed steel sheet of zinc-aluminum-magnesium alloy. The composition of the coating is: 2% Mg, 3% Al, and the rest is Zn. The steel plate is 22MnB5. The vitrification process is used for online processing, and the vitrification solution is rolled onto the coating. The surface of the steel plate is then dried. The drying temperature is 85 ° C, the thickness of the ceramic film is 100 nm, mainly composed of ZrO 2 , ZrOF 2 、Zr 2 OF 2 , MgO, Al 2 o 3 , ZnO, SiO 2 Composition, especially nano zirconia, alumina, magnesia. The hot-dip coating contains Si, Ti, F, Na and other elements; the main components of the vitrification solution are: fluorozirconium salt, hydrogen peroxide, fluorotitanic acid, zirconium fluoride, tartaric acid, sodium nitrate, tannic acid, KH550.

[0023] In the hot stamping process, in an atmosphere containing oxygen, the heating rate is controlled at 10°C / s in the temperature range below 650°C, and the heat preservation is c...

Embodiment 2

[0026] The coating is a hot-pressed steel sheet of zinc-aluminum-magnesium alloy. The composition of the coating is: 1.5% Mg, 2% Al, and the rest is Zn. The steel plate is 22MnB5. The off-line treatment is carried out by vitrification process, and the coating steel plate is immersed in vitrification solution , take it out and dry it. The drying temperature is 130 ° C, the thickness of the ceramic film is 1000 nm, mainly composed of ZrO 2 , ZrOF 2 、Zr 2 OF 2 , MgO, Al 2 o 3 , ZnO, SiO 2 Composition, especially nano zirconia, alumina, magnesia. The hot-dip coating contains Si, Ti, F, Na, K and other elements; the main components of the vitrification solution are: zirconium fluoride, hydrogen peroxide, fluorotitanic acid, zirconium fluoride, tartaric acid, sodium fluoroborate, potassium nitrate, lauryl alcohol Oxyethylene ether, KH550.

[0027] In the hot stamping process, in an atmosphere containing oxygen, the heating rate is controlled at 8°C / s in the temperature range...

Embodiment 3

[0030] The coating is a hot-pressed steel plate made of zinc-aluminum alloy. The composition of the coating is: 4.7% Al, the rest is Zn, and the steel plate is 30MnB5. The off-line treatment is carried out by vitrification process, and the coated steel plate is immersed in the vitrification solution. drying. The drying temperature is 110 ° C, the thickness of the ceramic film is 400 nm, mainly composed of ZrO 2 , ZrOF 2 、Zr 2 OF 2 、Al 2 o 3 , ZnO, SiO 2 Composition, especially nano-zirconia and alumina-based. The hot-dip coating contains Si, Ti, Mn, Na, F and other elements; the main components of the ceramic solution are: fluorozirconium salt, potassium permanganate, fluorotitanic acid, sodium persulfate, sodium nitrobenzenesulfonate, fluoride Zirconium, Sodium Citrate, KH560.

[0031] In the hot stamping process, in an atmosphere containing oxygen, the heating rate is controlled at 8°C / s in the temperature range below 650°C, and the heat preservation is carried out i...

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Abstract

The invention discloses a high-temperature-resistant zinc-based coated steel plate and its manufacturing method, thermoforming method and components. Due to the existence of ceramic chemical conversion film, it can withstand the high temperature of heating to 850-950 ° C, and the oxygen in the atmosphere passes through the ceramic film. Reacts slowly with the coating to form more oxides, which further prevents the evaporation of the zinc layer. After hot stamping, the coating is completely transformed into an iron alloy layer, without coating evaporation, and without hard Fe-Al intermetallic compounds.

Description

technical field [0001] The invention relates to a coated steel plate, in particular to a high-temperature-resistant zinc-based coated steel plate, a manufacturing method, a thermoforming method and components thereof. Background technique [0002] The modern automobile manufacturing industry requires a combination of weight reduction, energy saving, and safety. The emergence of hot-pressed steel meets the requirements in this regard, so it has been greatly developed. [0003] However, during the heating and stamping process of hot stamping, when the steel plate is exposed to the air at a temperature of several hundred degrees, serious surface oxidation will occur. After the stamping is completed, it needs to be cleaned and anti-corrosion treatment, which consumes manpower and cost. In order to solve this problem, various solutions have been proposed, including coating the steel plate surface with anti-corrosion paint, hot-dip aluminum-silicon coating, zinc-iron alloy coating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/40C23C22/73C23C22/34C23C28/00B21D22/02B21D37/16
CPCC23C2/06C23C2/40C23C22/34C23C22/73C23C28/321C23C28/345B21D22/02B21D37/16C23C2222/20
Inventor 吕家舜杨洪刚周芳李锋王永明徐承明刘仁东
Owner ANGANG STEEL CO LTD
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