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Thick pattern-free hot-dip galvanized steel coil and preparation method thereof

A galvanized steel, no flower heat technology, used in heat treatment equipment, hot dip plating process, heat treatment process control, etc. , poor surface quality and other problems, to achieve the effect of good quality, improving the coil shape of galvanized finished products, and ensuring uniformity

Pending Publication Date: 2022-04-12
HEBEI IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the technical problems such as uneven zinc layer thickness and poor surface quality in the preparation process of medium-thickness hot-dip galvanizing in the prior art, resulting in the problem that the corrosion resistance of the hot-dip galvanized sheet cannot meet higher requirements, the present invention provides A thick-gauge pattern-free hot-dip galvanized steel coil and its preparation method

Method used

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  • Thick pattern-free hot-dip galvanized steel coil and preparation method thereof
  • Thick pattern-free hot-dip galvanized steel coil and preparation method thereof
  • Thick pattern-free hot-dip galvanized steel coil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of thick-gauge pattern-free hot-dip galvanized steel coil, the chemical composition and mass percentage of the galvanized steel coil substrate are shown in Table 1, and the preparation method of the above-mentioned heat-based galvanized steel coil is as follows:

[0030] a: Smelting process: the molten steel conforming to the composition of the steel coil is smelted, refined, and continuously cast to obtain a slab;

[0031]b: Steel rolling process: the slab enters the steel rolling process, and after heating, rough rolling, finishing rolling, laminar cooling and coiling, hot-rolled coils are obtained;

[0032] c: pickling process: hot-rolled coils enter the pickling process, and pickled coils are obtained through pickling, rinsing and crimping;

[0033] d: Galvanizing process: pickling coils enter the galvanizing process, and undergo laser welding, annealing in an annealing furnace, galvanizing, air knife purging, post-plating cooling, skin finishing and crimping...

Embodiment 2

[0045] A kind of thick-gauge pattern-free hot-dip galvanized steel coil, the chemical composition and mass percentage of the galvanized steel coil substrate are shown in Table 1, and the preparation method of the above-mentioned heat-based galvanized steel coil is as follows:

[0046] a: Smelting process: the molten steel conforming to the composition of the steel coil is smelted, refined, and continuously cast to obtain a slab;

[0047] b: Steel rolling process: the slab enters the steel rolling process, and after heating, rough rolling, finishing rolling, laminar cooling and coiling, hot-rolled coils are obtained;

[0048] c: pickling process: hot-rolled coils enter the pickling process, and pickled coils are obtained through pickling, rinsing and crimping;

[0049] d: Galvanizing process: pickling coils enter the galvanizing process, and undergo laser welding, annealing in an annealing furnace, galvanizing, air knife purging, post-plating cooling, skin finishing and crimpin...

Embodiment 3

[0061] A kind of thick-gauge pattern-free hot-dip galvanized steel coil, the chemical composition and mass percentage of the galvanized steel coil substrate are shown in Table 1, and the preparation method of the above-mentioned heat-based galvanized steel coil is as follows:

[0062] a: Smelting process: the molten steel conforming to the composition of the steel coil is smelted, refined, and continuously cast to obtain a slab;

[0063] b: Steel rolling process: the slab enters the steel rolling process, and after heating, rough rolling, finishing rolling, laminar cooling and coiling, hot-rolled coils are obtained;

[0064] c: pickling process: hot-rolled coils enter the pickling process, and pickled coils are obtained through pickling, rinsing and crimping;

[0065] d: Galvanizing process: pickling coils enter the galvanizing process, and undergo laser welding, annealing in an annealing furnace, galvanizing, air knife purging, post-plating cooling, skin finishing and crimpin...

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Abstract

The invention discloses a thick pattern-free hot-dip galvanized steel coil and a preparation method thereof, and belongs to the technical field of metal smelting. A base plate of the hot-based galvanized steel coil comprises, by mass, 0.06%-0.09% of C, 0.03%-0.05% of Si, 1.0%-1.2% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.01% of S, smaller than or equal to 0.02% of Cu, smaller than or equal to 0.03% of Ni, smaller than or equal to 0.01% of Cr and the balance Fe and inevitable impurities. The preparation method comprises the procedures of smelting, steel rolling, acid pickling and zinc plating. The hot-based galvanized steel coil with the strip steel thickness of 5.0-6.0 mm, the zinc layer weight of 275-300 g / m < 2 > and the yield strength of 500 MPa or above can be obtained, the plating layer is compact and uniform, the surface quality is good, the performance is stable, and the corrosion resistance is excellent.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a thick-gauge pattern-free hot-dip galvanized steel coil and a production method thereof. Background technique [0002] Thick-gauge hot-dip galvanized sheets are mainly used for processing corrugated steel plate bridges and culverts, manufacturing steel silos for storage, and three-dimensional garages, etc., which have special requirements for base material corrosion protection. The zinc layer can make the steel base material last longer. The excellent electrochemical protection performance of the layer itself can further improve its corrosion resistance. [0003] With the continuous advancement of technology and the continuous improvement of equipment capabilities, the thickness of the zinc layer and the thickness of the continuous hot-dip galvanized sheet are constantly breaking through. However, for the production of non-spread galvanized steel sheets with a thickness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/16C22C38/18C22C38/20C22C38/40C22C38/42C23C2/06C23C2/20C23C2/40C23G3/02B23P15/00C21D1/26C21D6/00C21D8/02C21D11/00C22C33/04
Inventor 魏东华陈国涛王猛王广英贾海超唐嘉悦宋明明丁国军
Owner HEBEI IRON AND STEEL
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