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Galvanizing process for producing home appliance galvanized sheet by using modified sebdzimir method

A technology for galvanized sheets and home appliances, applied in hot-dip galvanizing technology, metal material coating technology, manufacturing tools, etc., can solve the problems of low thermal efficiency, high thermal efficiency, high cost, etc., achieve high heating efficiency, optimize rolling force, The effect of low manufacturing cost

Inactive Publication Date: 2019-08-16
常熟科弘材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two kinds of annealing processes for annealing furnaces: improved Sendzimir method (N.O.F) annealing furnace and American Steel Union method annealing furnace. The former has less investment, open flame heating + radiant tube heating, high thermal efficiency and low cost; Radiant tube heating, low thermal efficiency and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: The galvanizing process of the improved Sendzimir method for producing galvanized sheets for home appliances is specifically as follows.

[0030]Home appliance galvanized sheet DX51D, width 1350mm, thickness 0.4mm, generally used in refrigerator side panels. The open flame heating section is 1070°C, and the temperature of the exit section is 680°C; the furnace temperature of the radiant tube heating stage of the radiant tube section is 820°C, and the exit section temperature is 720°C; the furnace temperature of the radiant tube soaking stage is 720°C, and the exit section temperature is 690°C; The furnace temperature in the section is 460°C, and the strip temperature in the exit section is 440°C; the strip speed is 120 m / min, and the dew point in the furnace nose is controlled at -18°C to -20°C; mm, 0.9mm and 1.0mm. The rolling force of the skin pass machine is 2600KN, the elongation rate of the skin pass machine is 0.8%, and the elongation rate of the te...

Embodiment 2

[0032] Embodiment 2: The galvanizing process of the improved Sendzimir method for producing galvanized sheets for home appliances is specifically as follows.

[0033] DX51D galvanized sheet for general household appliances, with a width of 1200mm and a thickness of 0.3mm, is generally used for the back panel of refrigerators. The open flame heating section is 1050°C, and the temperature of the exit section is 650°C; the furnace temperature of the radiant tube heating stage of the radiant tube section is 800°C, and the exit section temperature is 710°C; the furnace temperature of the radiant tube soaking stage is 710°C, and the exit section temperature is 685°C; The furnace temperature in the section is 480°C, and the strip temperature in the take-out section is 460°C; the strip steel speed is 100 m / min; the dew point in the furnace nose is controlled at -22°C~-25°C; the air knife lip clearance is 0.7mm from the middle to both sides 0.85mm, 0.9mm and 1.0mm. The rolling force o...

Embodiment 3

[0035] Embodiment 3: The galvanizing process of the improved Sendzimir method for producing galvanized sheets for home appliances is specifically as follows.

[0036] DX51D galvanized sheet for general household appliances, with a width of 1200mm and a thickness of 0.4mm, is generally used for the back panel of refrigerators. The open flame heating section is 1100°C, and the temperature of the exit section is 700°C; the furnace temperature of the radiant tube heating stage of the radiant tube section is 810°C, and the exit section temperature is 730°C; the furnace temperature of the radiant tube soaking stage is 700°C, and the exit section temperature is 680°C; The furnace temperature in the section is 470°C, and the belt temperature in the take-out section is 450°C; the strip speed is 110 m / min; the dew point in the furnace nose is controlled at -20°C to -23°C; the air knife lip clearance is 0.7mm from the middle to both sides 0.85mm, 0.9mm and 1.0mm. The rolling force of th...

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PUM

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Abstract

The invention discloses a galvanizing process for producing a home appliance galvanized sheet by using a modified sebdzimir method. The galvanizing process comprises the processes of in-line annealing, hot galvanizing, finishing and drawing correction. The galvanizing process is characterized in that in the hot galvanizing process, nitrogen humidification is used in a furnace nose to control the dew point to -18 DEG C to -25 DEG C, and deslagging is carried out in real time in the furnace nose. When the galvanized sheet is DX51D, the in-line annealing process is characterized in that at an open firing section, the furnace temperature is 1050 DEG C-1100 DEG C, and the outlet section strip temperature is 650 DEG C-700 DEG C; at a radiant tube heating stage of a radiant tube section, the furnace temperature is 800 DEG C-820 DEG C, and the outlet section strip temperature is 710 DEG C-730 DEG C; at a radiant tube soaking stage of the radiant tube section, the furnace temperature is 700 DEGC-720 DEG C, and the outlet section strip temperature is 680 DEG C-690 DEG C; and at a cooling section, the furnace temperature is 460 DEG C-480 DEG C, and the outlet section strip temperature is 440DEG C-460 DEG C. The galvanizing process improves and develops a continuous hot galvanizing process theory, explores and studies out a hot galvanizing process technology suitable for producing the home appliance galvanized sheet by using the modified sebdzimir method, is of great significant in the modified sebdzimir method with less investment, and can create considerable economic benefits for an enterprise.

Description

technical field [0001] The invention relates to a hot-dip galvanizing method, in particular to a galvanizing process for producing home appliance galvanized sheets by an improved Sendzimir method. Background technique [0002] In recent years, with the rapid development of my country's home appliance manufacturing industry, the demand for galvanized home appliance panels is increasing rapidly, and the research technology of hot-dip galvanizing to thin gauge has also developed rapidly. The demand for galvanized sheets for home appliances is generally 0.3-0.8 mm. Among them, the 0.3-0.5mm galvanized sheet is generally used for the side panels and back panels of refrigerators that do not require high strength. 0.5-0.8mm galvanized sheet is generally used for high-strength washing machine panels, refrigerator panels and other parts. [0003] The grade of galvanized products depends on the heating method of the annealing furnace. At present, there are two kinds of annealing pr...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/40C21D1/26C21D9/00C21D1/76C23C2/20B21B37/58
CPCB21B37/58C21D1/26C21D1/76C21D9/0081C23C2/06C23C2/20C23C2/40
Inventor 吴全刚张维召曹会军
Owner 常熟科弘材料科技有限公司