Device for hot-dip coating Al-Zn (aluminum-zincic) on super high-strength band steel and processing technology
A hot-dip aluminum, ultra-high-strength technology, applied in the hot-dip plating process, metal material coating process, coating, etc., to achieve the effect of ensuring strength, improving profits, and solving difficult-to-dip metal coatings
Inactive Publication Date: 2010-10-13
BAOSHAN IRON & STEEL CO LTD
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However, after phase transformation strengthening and then heating for hot-dip galvanizing, the strength of the product will be reduced, which is a contradiction
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[0020] It should be noted that what is listed above is only a specific embodiment of the present invention, and obviously the present invention is not limited to the above embodiments, and there are many similar changes accordingly. All modifications directly derived or associated by those skilled in the art from the content disclosed in the present invention shall belong to the protection scope of the present invention.
[0021] For example, the present invention can be used for newly-built hot-dip galvanized production, and can also be used for the transformation of existing hot-dip galvanized production lines. When building a new hot-dip galvanized production line, an air-mist rapid cooling device is installed above the aluminum-zinc pot, and an aging furnace is built behind the cooling tower. When transforming the existing hot-dip aluminum-zinc alloy production line, the air-jet rapid cooling section above the zinc pot is transformed into an air-mist rapid cooling section,...
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Abstract
The invention discloses a device for hot-dip coating Al-Zn (aluminum-zincic) on super high-strength band steel and processing technology. The device comprises a decoiler, a pickler, a front looper, an annealing furnace, a fast cooling device, an overaging furnace, a back looper, a trimming machine and a coiling machine which are connected in sequence as well as an Al-Zn pot, at least one cooling bellows, water quench equipment and a drying unit, wherein the Al-Zn pot contains Al-Zn alloy liquid and is arranged between the annealing furnace and the fast cooling device, the cooling bellows is arranged between the fast cooling device and the overaging furnace, and the water quench equipment and the drying unit are arranged between the overaging furnace and the back looper. The device and the technology ensures the strength of the band steel, improves the product quality, overcomes the problem of difficult hot-dip coating mettallic coat on the super high-strength band steel products, improves the product profits of enterprises and brings in considerable economic benefit.
Description
technical field [0001] The invention relates to the field of steel strip hot-coating, in particular to a production line for hot-dipping aluminum-zinc steel strip. Background technique [0002] Ultra-high-strength steel strip products are a development trend of cold-rolled strip products. Ultra-high-strength steel strip usually refers to cold-rolled steel strip with a tensile strength greater than 600MPa. There are two ways to increase the strength of strip steel: alloy strengthening and phase transformation strengthening. These two methods are combined with each other, but they have different emphases according to the production equipment. What is competitive in the market and easy to produce is the production process based on phase transformation strengthening, that is, reducing the alloy content and producing ultra-high-strength strip steel by increasing the cooling rate. This requires great efforts to develop rapid cooling technology and equipment for strip steel. R...
Claims
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IPC IPC(8): C23C2/06C23C2/12C23C2/40C23C2/04
Inventor 向顺华刘华飞瞿培磊朱晓东
Owner BAOSHAN IRON & STEEL CO LTD