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Production process of galvanized steel coil

A production process and technology of galvanized steel, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve problems such as galvanized layer peeling off, extend service life, inhibit cathode process, and enhance corrosion resistance performance effect

Active Publication Date: 2020-08-21
ZHEJIANG SOUTHEAST METAL SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are following defects in the above-mentioned technical scheme: pollutants such as dust and iron powder are easily and firmly bonded on the substrate surface of cold-rolled low-carbon steel, and the existence of these pollutants has a greater impact on the quality of galvanized steel sheets. After a period of time, the galvanized layer on the surface of the steel plate is prone to fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of production technology of galvanized steel coil, the production technology of this galvanized steel coil comprises the steps:

[0038] S1, take a cold-rolled hard steel coil with a thickness of 0.6mm, and its chemical composition and content are shown in Table 1. After being uncoiled by an uncoiler, the head and tail are cut and welded by an automatic seam welder;

[0039] S2, weigh 200g of sodium hyphenate and 1350g of deionized water in proportion, add them to a glass container, stir at room temperature and completely dissolve the sodium hyphenate, adjust the pH of the solution to 5.5, then add 25g of gallium chloride and 200g of silicic acid Sodium and 50g of sodium stearate were stirred at room temperature for 4 hours at a speed of 625r / min to obtain a degreasing solution, and then the cold-rolled hard steel coils treated by S1 were immersed in the degreasing solution, brushed with brush rollers, and dried with hot air. 1. Through the entrance looper, degre...

Embodiment 2

[0046] A kind of production technology of galvanized steel coil, the production technology of this galvanized steel coil comprises the steps:

[0047] S1, take a cold-rolled hard steel coil with a thickness of 0.4mm, and its chemical composition and content are shown in Table 1. After being uncoiled by an uncoiler, the head and tail are cut and welded by an automatic seam welder;

[0048] S2, weigh 150g of sodium hyphenate and 1300g of deionized water in proportion, add them to a glass container, stir at room temperature and completely dissolve the sodium hyphenate, adjust the pH of the solution to 5, then add 20g of gallium chloride and 150g of silicic acid Sodium and 30g of sodium stearate were stirred at room temperature for 3 hours at a speed of 600r / min to obtain a degreasing solution, and then the cold-rolled hard steel coils treated by S1 were immersed in the degreasing solution, brushed with brush rollers, and dried with hot air. 1. Through the entrance looper, degreas...

Embodiment 3

[0055] A kind of production technology of galvanized steel coil, the production technology of this galvanized steel coil comprises the steps:

[0056] S1, take a cold-rolled hard steel coil with a thickness of 0.8mm, and its chemical composition and content are shown in Table 1. After being uncoiled by an uncoiler, the head and tail are cut and welded by an automatic seam welding machine;

[0057] S2, weigh 250g of sodium hyphenate and 1400g of deionized water in proportion, add them into a glass container, stir at room temperature and completely dissolve the sodium hyphenate, adjust the pH of the solution to 6, then add 30g of gallium chloride and 250g of silicic acid Sodium and 70g of sodium stearate were stirred at room temperature at a speed of 650r / min for 5 hours to obtain a degreasing solution, and then the cold-rolled hard steel coils treated by S1 were immersed in the degreasing solution, brushed with brush rollers, and dried with hot air. 1. Through the entrance loop...

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Abstract

The invention relates to a production process of a galvanized steel coil. The production process comprises the following steps that S1, a cold rolled hard steel coil is subjected to uncoiling, head and tail cutting and welding in sequence; S2, degreasing fluid is prepared, the steel coil treated in the step S1 is soaked into the degreasing fluid, brushed by a brushing roller, dried by hot air andtreated by an entry looper; S3, the steel coil obtained in the step S1 is annealed; S4, the annealed steel coil is placed into a zinc pot to be soaked for 4-5s, and is purged by an air knife, cooled,dried by hot air and finished in sequence to obtain the galvanized steel coil; S5, the galvanized steel coil is heated and taken out, a suction pipe is used for sucking passivating fluid to drop the fluid to the surface of the galvanized steel coil, and drying is carried out; S6, the steel coil treated in the step S5 is subjected to fingerprint resistant coating treatment, passes through an exit looper and is coated with oil; and S7, the steel coil obtained in the step S6 is cut, coiled, uncoiled and packaged. The production process of the galvanized steel coil can effectively remove pollutants such as dust and iron powder firmly stuck to the surface of the steel coil, and is beneficial to improving the quality of the galvanized steel coil, thereby prolonging the service life of the galvanized steel coil.

Description

technical field [0001] The invention relates to the technical field of steel coil processing, in particular to a production process for galvanized steel coils. Background technique [0002] The production process of hot-dip galvanized steel coils uses cold-rolled hard steel coils as raw materials. The cold-rolled hard steel coils are immersed in a molten zinc bath to make a layer of zinc adhere to the surface. Galvanized steel coil has excellent corrosion resistance and can prolong the service life. It is widely used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. For example, the construction industry is mainly used to manufacture anti-corrosion industrial and civil building houses. Panels, roof grilles, etc.; light industry uses it to manufacture home appliance casings, civil chimneys, kitchen utensils, etc.; the automobile industry is mainly used to manufacture corrosion-resistant parts of cars, etc.; agricult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/02C23C2/06C23C2/20C23C2/28C23C22/05C23C22/73C23G1/08C22C38/12C22C38/06C22C38/04C22C38/02C21D1/26
CPCC23C2/06C23C2/02C23C2/20C23C2/28C23C22/73C22C38/02C22C38/04C22C38/06C22C38/12C22C38/002C23C22/05C21D1/26C23G1/08
Inventor 郭金望高淼
Owner ZHEJIANG SOUTHEAST METAL SHEET
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