Method for producing alloyed hot-dipping galvanized steel sheet
A technology of hot-dip galvanized steel sheet and production method, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve problems such as deterioration of corrosion resistance, coating powdering and peeling, surface defects, etc., to achieve The effect of excellent corrosion resistance, good welding performance and coating performance
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[0026] Example 1:
[0027] A production method of alloyed hot-dip galvanized steel sheet includes a strip steel production process, a strip steel galvanizing process, an alloying process, a leveling process, and a passivation process:
[0028] The strip galvanizing process is as follows: the temperature of the strip steel entering the zinc pot is 470°C, and the temperature of the zinc solution is 460°C; the zinc solution contains the following substances and mass percentages: Al: 0.14%, Pb≤0.003%, Fe: 0.05%, the remaining elements are less than or equal to 0.003%. In the galvanized layer, the δ1 phase of iron is FeZn 8 , The Γ1 phase at the interface of δ1 / steel matrix is Fe 3 Zn 10 .
[0029] The alloying process is: the temperature of the alloying furnace is controlled at 490°C, and the alloying time is controlled at 10-15s;
[0030] The flattening process is: cooling the alloyed strip steel to below 40° C., and sending it to a finishing machine, so that the roughness of the a...
Example Embodiment
[0032] Example 2:
[0033] A production method of alloyed hot-dip galvanized steel sheet includes a strip steel production process, a strip steel galvanizing process, an alloying process, a leveling process, and a passivation process:
[0034] The strip galvanizing process is as follows: the temperature of the strip steel entering the zinc pot is 465°C, and the temperature of the zinc solution is 455°C; the zinc solution contains the following substances and mass percentages: Al: 0.13%, Pb≤0.003%, Fe: 0.04%, the remaining impurity elements are less than or equal to 0.003%. In the galvanized layer, the δ1 phase of iron is FeZn 9 , The Γ1 phase at the interface of δ1 / steel matrix is Fe 3 Zn 10 .
[0035] The alloying process is as follows: the temperature of the alloying furnace is controlled at 500°C, and the alloying time is controlled at 10-15s;
[0036] The flattening process is: cooling the alloyed strip steel to below 40°C, and sending it to a finishing machine, so that the ...
Example Embodiment
[0038] Example 3:
[0039] A production method of alloyed hot-dip galvanized steel sheet includes a strip steel production process, a strip steel galvanizing process, an alloying process, a leveling process, and a passivation process:
[0040] The strip galvanizing process is as follows: the temperature of the strip steel entering the zinc pot is 465°C, the temperature of the zinc solution is 455°C; the zinc solution contains the following substances and mass percentages: Al: 0.12%, Pb≤0.003%, Fe: 0.03%, the remaining impurity elements are less than or equal to 0.003%. In the galvanized layer, the δ1 phase of iron is FeZn 10 , The Γ1 phase at the interface of δ1 / steel matrix is Fe 3 Zn 10 .
[0041] The alloying process is: the temperature of the alloying furnace is controlled at 500°C, and the alloying time is controlled at 10-15s;
[0042] The flattening process is: cooling the alloyed strip steel to below 40°C, and sending it to a finishing machine, so that the roughness of t...
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