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Hot-dip aluminum-zinc plate/strip used for highly deep drawing and preparation method thereof

A hot-dip aluminum-zinc sheet and ultra-deep drawing technology, which is applied in hot-dip plating process, coating, metal material coating process, etc. Can not meet the use requirements and other problems, to achieve the effects of excellent mechanical properties and ultra-deep drawing performance, good surface quality, and good stamping formability

Active Publication Date: 2016-09-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical properties of the hot-dip galvanized sheet prepared by it are low, and the stamping performance of the coating is not required, and it cannot meet the ultra-deep drawing requirements of users such as household appliances.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the above-mentioned hot-dip galvanized sheet / strip for ultra-deep drawing includes a hot rolling process, a cold-rolled substrate degreasing and cleaning process, a continuous annealing process, a hot dip coating process, a skin pass process, a tension leveling process, and a surface treatment process, wherein In order to ensure that the crystal grains of the substrate grow fully and increase uniformly, the hot rolling process is as follows: the final rolling temperature is 900-950°C, and the coiling temperature is 730-800°C.

[0026] The above-mentioned preparation method of hot-dip galvanized galvanized sheet / strip for ultra-deep drawing involves degreasing and cleaning the cold-rolled substrate to ensure that the substrate enters the zinc pot with a clean surface. Better performance, more conducive to the combination of the substrate and the coating, otherwise it will easily lead to poor adhesion of the coating, and the coating will fall off ...

Embodiment 1

[0033] The thickness of the hot-dip galvanized sheet for ultra-deep drawing is 0.7mm, the substrate is ultra-low carbon IF steel, and the main components are: C 0.0023%, Si0.015%, Mn 0.12%, P 0.008%, S 0.007%, Al S 0.047%, Ti 0.065%, Nb 0.010%.

[0034] Its preparation process includes hot rolling process, cold rolling substrate degreasing and cleaning process, continuous annealing process, hot dip coating process, skin pass process, tension leveling process, and surface treatment process;

[0035] Among them, the hot rolling process is as follows: the final rolling temperature is 925°C, and the coiling temperature is 775°C.

[0036] The degreasing and cleaning process is as follows: the temperature of the bath needs to be controlled at 75°C, the concentration of the alkali solution in the degreasing tank is 75, the alkali point of the cleaning tank is 3.2, and the drying temperature of the strip is 115°C.

[0037] The continuous annealing process is as follows: the annealin...

Embodiment 2

[0043] The thickness of the hot-dip galvanized sheet for ultra-deep drawing is 0.7mm, and the substrate is ultra-low carbon IF steel. The main components are: C 0.0020%, Si0.012%, Mn 0.10%, P 0.006%, S 0.006%, Al S 0.045%, Ti 0.063%, Nb 0.015%.

[0044] Its preparation process includes hot rolling process, cold rolling substrate degreasing and cleaning process, continuous annealing process, hot dip coating process, skin pass process, tension leveling process, and surface treatment process;

[0045] Among them, the hot rolling process is as follows: the final rolling temperature is 935°C, and the coiling temperature is 750°C.

[0046] The degreasing and cleaning process is as follows: the temperature of the bath liquid needs to be controlled at 75°C, the alkali point of the degreasing tank is 90, the alkali point of the cleaning tank is 6, and the drying temperature of the strip is 120°C.

[0047] The continuous annealing process is as follows: the annealing temperature is co...

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Abstract

The invention relates to a hot-dip aluminum-zinc plate / strip and a preparation method thereof, in particular to a hot-dip aluminum-zinc plate / strip with highly deep drawing performance and a preparation method thereof. The hot-dip aluminum-zinc plate / strip used for highly deep drawing comprises an IF steel base plate and a coating, wherein the IF steel base plate is composed of, by weight, 0-0.005% of C, 0-0.02% of Si, 0-0.15% of Mn, 0-0.010% of P, 0-0.010% of S, 0.020%-0.060% of Als, 0.050%-0.085% of Ti, 0.005%-0.030% of Nb and the balance Fe and inevitable impurities; and the coating is composed of, by weight, 53%-56% of Al, 42%-44% of Zn and 1.4 %-1.8% of Si. According to the hot-dip aluminum-zinc plate / strip used for highly deep drawing, the mechanical performance and the highly deep drawing performance are excellent; the yield strength is 130-190 Mpa; the tensile strength is 280-350 Mpa; the elongation is larger than or equal to 38%; n is larger than or equal to 0.19; r is larger than or equal to 2.2; the surface quality is good; the using requirements of automobiles, household appliances and other highly deep drawing users can be met; and in addition, the coating of the hot-dip aluminum-zinc plate / strip is compact and uniform, so that the good stamping formability, high temperature resistance and corrosion resistance are achieved.

Description

technical field [0001] The invention relates to a hot-dip galvanized sheet / strip and a preparation method thereof, in particular to a hot-dip galvanized sheet / strip with ultra-deep drawing performance and a preparation method thereof. Background technique [0002] Hot-dip galvanized sheet (GL sheet) is successfully developed on the basis of hot-dip aluminum and hot-dip galvanizing. It combines the excellent atmospheric corrosion resistance, heat resistance and oxidation resistance of aluminized steel sheet and the excellent Electrochemical protection, under various atmospheric conditions, its corrosion resistance life is 2 to 6 times higher than that of hot-dip galvanized sheet, mainly used in construction, home appliances and other fields. In view of the high corrosion resistance of hot-dip galvanized sheets, users in the home appliance industry hope to use hot-dip galvanized sheets to make air-conditioning chassis and TV backplanes to replace electro-galvanized sheets, hot...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C38/12C22C21/10C23C2/12
CPCC22C21/10C22C38/12C22C38/14C23C2/12
Inventor 董学强郭太雄郑之旺岳安宏向安平
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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