Alloyed zinc aluminum magnesium alloy coated steel plate and production method thereof

A technology of coated steel sheet and production method, which is applied in the direction of metal layered products, chemical instruments and methods, layered products, etc., can solve the problems that have not yet been studied on the alloying of zinc-aluminum-magnesium coatings, achieve excellent formability and increase corrosion resistance , good corrosion resistance

Active Publication Date: 2014-01-15
ANGANG STEEL CO LTD
View PDF8 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1310770A provides an alloyed galvanized steel sheet with good adhesion and excellent pressure forming performance, CN101353761A provides a TRIP steel sheet with an alloyed galvanized layer, and US64...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Alloyed zinc aluminum magnesium alloy coated steel plate and production method thereof
  • Alloyed zinc aluminum magnesium alloy coated steel plate and production method thereof
  • Alloyed zinc aluminum magnesium alloy coated steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Alloyed zinc-aluminum-magnesium coated steel sheet with excellent formability and production method thereof

[0027] The chemical composition of the plating solution is Al: 6 wt%, Mg: 3 wt%, mixed rare earth 0.05 wt%, and the rest is Zn and unavoidable impurities.

[0028] Steel plate containing 10 vol %H 2 N 2 After annealing, dip into the plating solution, the temperature of the plating solution is 560°C, the temperature of the steel plate into the zinc pot is 530°C, and the dipping time of the steel plate in the plating solution is 2s.

[0029] After plating, the steel plate is cooled by an air knife, the cooling rate is 30°C / s, and the strip speed is 100m / min.

[0030] After being cooled by an air knife, the zinc-aluminum-magnesium steel plate enters the alloying furnace, the alloying temperature is 550°C, the alloying time is 10s, and then the steel plate is cooled at a rate of 30°C / s.

[0031] The content of Fe in the coating is 2.2wt%, Al content 9.3wt%, Mg co...

Embodiment 2

[0033] Alloyed zinc-aluminum-magnesium coated steel sheet with excellent formability and production method thereof

[0034] The chemical composition of the plating solution is Al: 3 wt%, Mg: 0.5 wt%, misch metal 0.03 wt%, and the rest are Zn and unavoidable impurities.

[0035] Steel plate containing 10 vol %H 2 N 2 After annealing, dip into the plating solution, the temperature of the plating solution is 580°C, the temperature of the steel plate into the zinc pot is 550°C, and the dipping time of the steel plate in the plating solution is 3s.

[0036] The steel plate is cooled by air knife after plating, the cooling rate is 20°C / s, and the strip speed is 100m / min.

[0037] After being cooled by an air knife, the zinc-aluminum-magnesium steel plate enters the alloying furnace, the alloying temperature is 530°C, the alloying time is 8s, and then the steel plate is cooled at a rate of 20°C / s.

[0038] The Fe content in the coating is 3.2wt%, Al content 5.8wt%, Mg content 1.66...

Embodiment 3

[0040] Alloyed zinc-aluminum-magnesium coated steel sheet with excellent formability and production method thereof

[0041] The chemical composition of the plating solution is Al: 1 wt%, Mg: 1 wt%, mixed rare earth 0.02 wt%, and the rest is Zn and unavoidable impurities.

[0042] Steel plate containing 5 vol %H 2 N 2 After annealing, dip into the plating solution, the temperature of the plating solution is 550°C, the temperature of the steel plate into the zinc pot is 540°C, and the dipping time of the steel plate in the plating solution is 2s.

[0043] The steel plate is cooled by air knife after plating, the cooling rate is 10°C / s, and the strip speed is 100m / min.

[0044] After being cooled by an air knife, the zinc-aluminum-magnesium steel plate enters the alloying furnace, the alloying temperature is 510°C, the alloying time is 6s, and then the steel plate is cooled at a rate of 30°C / s.

[0045] The content of Fe in the coating is 4.3wt%, Al content 3.6wt%, Mg content ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an alloyed zinc aluminum magnesium alloy coated steel plate and a production method thereof. The coating has an Fe content of not more than 5%, the coating surface contains an MgZn2 phase, which has a particle size of not greater than 5 micrometers. The coating surface is in the form of equiaxed grains, and in the coating, Mg accounts for 1.5-8wt%, aluminum accounts for 1.5-15wt%, and rare earth accounts for 0-0.2wt%. According to the production method, cold rolled strip steel is subjected to continuous annealing and hot dipping in a continuous hot dip galvanizing unit, and then alloy treatment is carried out on the hot-dip galvanized zinc aluminum magnesium steel plate. Chemically, a plating solution comprises 1.0-11wt% of Al, 0.5-5wt% of Mg, and the balance Zn and inevitable impurities. After the steel plate undergoes annealing by N2 containing 0.5%-30 vol % of H2, the steel plate is immersed in the plating solution at a temperature of 450-650DEG C, the steel plate enters a zinc pot at 420-580DEG C, and the immersion plating time of the steel plate in the plating solution is 1-10s. After air knife cooling, the zinc aluminum magnesium steel plate enters an alloying furnace to undergo alloying treatment, the alloying temperature is 450-650DEG C, the alloying time is 3-20s, and then the steel plate is cooled at a speed of 10-50DEG C/s. The steel plate provided by the invention ensures that the coating does not fall off in a complex forming process, and after forming, the zinc aluminum magnesium coating can put its excellent corrosion resistance to good use, thus prolonging the service life of components.

Description

technical field [0001] The invention belongs to the field of hot-dip galvanizing, and in particular relates to an alloyed zinc-aluminum-magnesium coated steel plate with excellent formability and good corrosion resistance and a production method thereof. Background technique [0002] In order to meet the increasing corrosion resistance requirements, in addition to hot-dip galvanized products, hot-dip aluminum, hot-dip tin-zinc, hot-dip aluminum-zinc alloy, hot-dip galvanized aluminum-magnesium coated steel sheets and other varieties have been developed. Galvanized aluminum-magnesium-coated steel sheets have been widely valued for their excellent corrosion resistance. Developed countries such as Japan, Europe and the United States have successively developed products such as ZM, Z6A3M, and Z10A3M. Patents CN101812653A, US6235410B1, etc. have developed zinc-based coatings containing aluminum and magnesium, which greatly improve corrosion resistance. Compared with the traditio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B32B15/01C23C2/06C23C2/40
Inventor 杨洪刚李锋吕家舜
Owner ANGANG STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap