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Zinc corrosion-resistant S and Nb-containing iron pan material for hot-dip galvanizing

A hot-dip galvanizing and zinc corrosion technology, applied in the field of alloys, can solve the problem of only 2.5 months of service life, and achieve the effects of excellent anti-oxidation ability, shortened service life and high bonding strength

Inactive Publication Date: 2018-08-24
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The average service life of cast iron zinc pots in early hot-dip galvanizing was only 2.5 months

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A zinc-corrosion-resistant iron pan material containing S and Nb for hot-dip galvanizing at 360-450 degrees. In terms of weight percentage, the chemical composition of the alloy is: Ca:0.3wt.%, Ge:0.5wt.%, In:0.2wt.%, S:0.1wt.%, Nb:1.2wt.%, W:0.3wt .%, the balance is iron. Alloy preparation method: Add the above-mentioned raw materials into an argon-protected induction furnace, and use a silicon carbide crucible; induction heating to 1500-1600 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; The alloy liquid is kept at 1500-1600 degrees for 10 minutes and then cast into the required round ingot. The obtained ingot is hot-rolled at 800 degrees, and the rolling reduction in each pass is 10-15%. After every two hot rollings, the intermediate annealing temperature is 900 degrees, and the temperature is kept for 1 hour. Finally, the material is rolled into a steel plate with a thickness of 40-60mm, and the ...

Embodiment 2

[0020] A zinc-corrosion-resistant iron pan material containing S and Nb for hot-dip galvanizing at 360-450 degrees. In terms of weight percentage, the chemical composition of the alloy is: Ca: 0.8wt.%, Ge: 0.8wt.%, In: 0.4wt.%, S: 0.2wt.%, Nb: 1.4wt.%, W: 0.4wt .%, the balance is iron. Alloy preparation method: Add the above-mentioned raw materials into an argon-protected induction furnace, and use a silicon carbide crucible; induction heating to 1500-1600 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; The alloy liquid is kept at 1500-1600 degrees for 10 minutes and then cast into the required round ingot. The obtained ingot is hot-rolled at 800 degrees, and the rolling reduction in each pass is 10-15%. After every two hot rollings, the intermediate annealing temperature is 900 degrees, and the temperature is kept for 1 hour. Finally, the material is rolled into a steel plate with a thickness of 40-60mm, an...

Embodiment 3

[0023]A zinc-corrosion-resistant iron pan material containing S and Nb for hot-dip galvanizing at 360-450 degrees. In terms of weight percentage, the chemical composition of the alloy is: Ca: 0.4wt.%, Ge: 0.6wt.%, In: 0.3wt.%, S: 0.1wt.%, Nb: 1.2wt.%, W: 0.3wt .%, the balance is iron. Alloy preparation method: Add the above-mentioned raw materials into an argon-protected induction furnace, and use a silicon carbide crucible; induction heating to 1500-1600 degrees to form an alloy solution, and use the electromagnetic stirring effect to fully stir for about 10 minutes; The alloy liquid is kept at 1500-1600 degrees for 10 minutes and then cast into the required round ingot. The obtained ingot is hot-rolled at 800 degrees, and the rolling reduction in each pass is 10-15%. After every two hot rollings, the intermediate annealing temperature is 900 degrees, and the temperature is kept for 1 hour. Finally, the material is rolled into a steel plate with a thickness of 40-60mm, and...

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Abstract

The invention discloses a zinc corrosion-resistant S and Nb-containing iron pan material for hot-dip galvanizing and a processing technology thereof. By weight percentage, the alloy comprises: 0.3-0.8wt.% of Ca, 0.5-0.8wt.% of Ge, 0.2-0.4wt.% of In, 0.1-0.2wt.% of S, 1.2-1.4wt.% of Nb, 0.3-0.4wt.% of W, and the balance iron. The material can be made into iron crucibles for hot-dip galvanizing after casting and hot rolling into steel plate, and can greatly improve the corrosion resistance to zinc liquid. The service life of iron crucibles can be increased from 7-10 years to 20 years or more. Therefore, the material provided by the invention has the effects of improving production efficiency and saving cost.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an iron alloy. Background technique [0002] When steel materials are used in environments such as atmosphere, seawater, soil and building materials, they will be corroded to varying degrees. According to statistics, the annual loss of steel materials due to corrosion in the world can account for about 1 / 3 of its total output. In order to ensure the normal use of steel products and prolong their service life, the anti-corrosion protection technology of steel has been widely valued by people. [0003] As we all know, the anti-atmospheric corrosion mechanism of zinc has mechanical protection and electrochemical protection. Under atmospheric corrosion conditions, the surface of the zinc layer has ZnO, Zn(OH) 2 And basic zinc carbonate protective film, to a certain extent slow down the corrosion of zinc. When the zinc layer is severely damaged and endangers the iron substrate, zinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/12C22C33/04C21D8/02C23C2/06
CPCC22C38/002C21D8/0226C21D8/0263C22C33/04C22C38/12C22C38/60C23C2/003C23C2/06
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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