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Timeliness-free high-strength galvanized steel strip for household appliances and production method of timeliness-free high-strength galvanized steel strip

A technology of galvanized steel strip and production method, applied in the metallurgical field, can solve the problem of lack of timeliness, etc., and achieve the effect of good surface quality

Inactive Publication Date: 2018-07-10
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the currently widely used ultra-low carbon products as the substrate of high-strength steel for home appliances, through reasonable control of hot-rolling and cold-rolling processes to achieve the performance of high-strength steel required by home appliances, and there is no timeliness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The non-aging high-strength galvanized steel strip used in this example has a thickness of 0.6mm, and its chemical composition and mass percentage are: C: 0.008%, Mn: 0.15%, S: 0.015%, P: 0.020% , Si: 0.03%, Als: 0.046%, N: 0.0035%, Ti: 0.030%, and the rest are Fe and inclusions within the allowable range.

[0020] The production method of the non-time-sensitive high-strength galvanized steel strip for household appliances in this embodiment includes hot rolling, cold rolling and galvanizing processes, and the specific process steps are as follows:

[0021] (1) Hot rolling process: the coiling temperature is 680°C. The rolling specification of hot-rolled strip steel is 2.75×1020mm, and its properties are: tensile strength 313MPa, yield strength 246MPa, elongation 45.5%;

[0022] (2) Cold rolling process: the thickness of cold rolling is 0.6×1000mm, and the compression ratio is 78.2%;

[0023] (3) Galvanizing process: the production line speed is 125m / min, the annealin...

Embodiment 2

[0026] The non-aging high-strength galvanized steel strip used in this example has a thickness of 0.6mm, and its chemical composition and mass percentage are: C: 0.008%, Mn: 0.15%, S: 0.015%, P: 0.020% , Si: 0.03%, Als: 0.046%, N: 0.0035%, Ti: 0.030%, and the rest are Fe and inclusions within the allowable range.

[0027] The production method of the non-time-sensitive high-strength galvanized steel strip for household appliances in this embodiment includes hot rolling, cold rolling and galvanizing processes, and the specific process steps are as follows:

[0028] (1) Hot rolling process: coiling temperature is 660°C; the rolling specification of hot-rolled strip steel is 2.75×1020mm, and the properties are: tensile strength 313MPa, yield strength 246MPa, elongation 45.5%;

[0029] (2) Cold rolling process: the thickness of cold rolling is 0.6×1000mm, and the compression ratio is 78.2%;

[0030] (3) Galvanizing process: the production line speed is 125m / min, the annealing tim...

Embodiment 3

[0033] The non-aging high-strength galvanized steel strip used in this example has a thickness of 1.2 mm, and its chemical composition and mass percentage are: C: 0.008%, Mn: 0.15%, S: 0.015%, P: 0.020% , Si: 0.03%, Als: 0.046%, N: 0.0035%, Ti: 0.075%, and the rest are Fe and inclusions within the allowable range.

[0034] The production method of the non-time-sensitive high-strength galvanized steel strip for household appliances in this embodiment includes hot rolling, cold rolling and galvanizing processes, and the specific process steps are as follows:

[0035] (1) Hot rolling process: the coiling temperature is 670°C. The rolling specification of hot-rolled strip steel is 4.5×1270mm, and its properties are: tensile strength 308MPa, yield strength 226MPa, elongation 48.5%;

[0036] (2) Cold rolling process: cold rolling thickness is 1.2×1000mm, compression ratio is 73.3%;

[0037] (3) Galvanizing process: the production line speed is 110m / min, the annealing time is 152s,...

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Abstract

The invention discloses a timeliness-free high-strength galvanized steel strip for household appliances and a production method of the timeliness-free high-strength galvanized steel strip. The chemical components of the steel strip comprise, by mass percentage, not larger than 0.008% of C, not larger than 0.15% of Mn, not larger than 0.015% of S, not larger than 0.020% of P, not larger than 0.03%of Si, 0.020-0.060% of Als, not larger than 0.0040% of N, 0.015-0.075% of Ti and the balance Fe and inclusions in an allowable range. The production method comprises the processes of hot rolling, coldrolling and galvanizing. According to the timeliness-free high-strength galvanized steel strip and the production method, the performance of hot rolling incoming materials is appropriately improved by lowering the hot rolling winding temperature, and the grain size of galvanized products is controlled by lowering the annealing temperature and shortening the annealing time in the galvanizing process, so that the required performance of the high-strength galvanized steel strip product for the household appliances is obtained. The steel strip has sufficient strength, no timeliness and sufficientsurface quality.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a non-aging high-strength galvanized steel strip for household appliances and a production method thereof. Background technique [0002] With the rapid development of the home appliance industry, people have higher and higher requirements for the corrosion resistance and appearance of home appliances. The proportion of galvanized products in steel for home appliances is constantly increasing. Different degrees of bumps, so galvanized steel sheets for household appliances require a certain strength to ensure the resistance to dents and drops of the steel sheets. Since household appliances generally undergo processes such as slitting, color coating, blanking, and stamping assembly, the processing cycle from steel plates to finished home appliances is relatively long, so the timeliness requirements for steel plates are relatively high. [0003] In order to ensure the...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C38/06C22C38/04C22C38/02C23C2/06C23C2/28C23C2/40C21D8/02
CPCC22C38/14C21D8/0205C21D8/0226C21D8/0236C22C38/001C22C38/02C22C38/04C22C38/06C23C2/06C23C2/28C23C2/40
Inventor 李建英吴建国魏焕君弓俊杰韩冰张斌孙宏亮姚勇创孙璐
Owner TANGSHAN IRON & STEEL GROUP
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