High-temperature hot dipping method for producing steel strip hot dipped with zinc-base alloy

A technology of hot-dip galvanizing and steel strip, which is applied in hot-dip galvanizing process, metal material coating process, coating and other directions to achieve the effect of improving operating power, saving zinc resources and reducing the amount of coating.

Inactive Publication Date: 2011-10-05
宜昌三峡全通涂镀板有限公司 +1
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AI-Extracted Technical Summary

Problems solved by technology

[0019] The technical problem to be solved by the present invention is to provide a bath temperature range higher than the current bath temperature for the steel strip hot-dip galvanized ...
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Method used

2, while carrying out steel strip hot-dip plating production, on the one hand small stride, multi-step ground raises air knife blower operating power, raises air knife wind pressure air volume, for example each raises operating power 2%, thereby Realize the reduction of the coating amount in small steps...
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Abstract

The invention relates to a high-temperature hot dipping method for producing a steel strip hot dipped with zinc-base alloy. When a steel strip is hot dipped with the zinc-base alloy, the working temperature of a dipping solution is controlled between 530 DEG C and 560 DEG C; and the operating power of an air knife blower is adjusted at most to a maximum value within a power interval which cannot initiate a metal flow line of a plate surface. In the invention, the temperature of the dipping solution is set as a value between 530 DEG C and 560 DEG C; at the same time, the operating power of theair knife blower is adjusted for a higher value as much as possible; because a temperature reducing space for the dipping solution of the plate surface is allowed to be greatly enlarged, the operating power of the air knife blower is greatly enhanced, the plating quantity is obviously reduced and zinc consumption is thoroughly reduced; and because the temperature region in which the dipping solution severely corrodes steel is avoided in the temperature range, a borne negative effect is much lower than the benefit retribution obtained due to zinc consumption reduction.

Application Domain

Hot-dipping/immersion processes

Technology Topic

Working temperatureMetal +3

Image

  • High-temperature hot dipping method for producing steel strip hot dipped with zinc-base alloy
  • High-temperature hot dipping method for producing steel strip hot dipped with zinc-base alloy

Examples

  • Experimental program(3)

Example Embodiment

[0042] Example 1: In the production of five-element zinc alloy (zinc-aluminum-magnesium-silicon-rare earth) hot-dip steel strip, the temperature of the plating solution is controlled to 535±5°C; the operating power of the air knife blower is adjusted to the power that does not cause metal flow lines on the plate The highest value of the interval.

Example Embodiment

[0043] Embodiment 2: In the production of five-element zinc alloy hot-dip steel strip, the temperature of the plating solution is controlled to 545±5°C; the operating power of the air knife blower is adjusted to the highest value in the power range that does not cause metal flow on the plate.

Example Embodiment

[0044] Example 3: In the production of five-element zinc alloy hot-dip steel strip, the temperature of the plating solution is controlled to 555±5°C; the operating power of the air knife blower is adjusted to the highest value in the power range that does not cause metal flow patterns on the sheet surface.

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Description & Claims & Application Information

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