Low-aluminum-zinc-aluminum-magnesium coating plate and preparation method thereof

The invention provides a low-aluminum-zinc-aluminum-magnesium coated plate and a preparation method thereof, and belongs to the field of steel rolling. The method comprises the following steps: carrying out cold rolling on a pickled plate to obtain a cold hard rolled plate with the surface roughness...

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Bibliographische Detailangaben
Hauptverfasser: SONG QINGSONG, MA SHU, QI DA, HOU GENGJIE, ZHU WENLI, WANG ANDONG, MA XINGJIANG, JING YUSEN, HAN ZHIGANG, WANG SHUO, LI RUNCHANG, ZHENG YANKUN, LIU XUAN, CHEN BIAO, PAN MING
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention provides a low-aluminum-zinc-aluminum-magnesium coated plate and a preparation method thereof, and belongs to the field of steel rolling. The method comprises the following steps: carrying out cold rolling on a pickled plate to obtain a cold hard rolled plate with the surface roughness Ra greater than or equal to 0.8 mu m; the cold hard base plate is subjected to annealing and hot dipping, a steel plate with the surface being a zinc-aluminum-magnesium plating layer is obtained, in the hot dipping process, a plating solution comprises, by mass, 1.0%-1.4% of Mg and 1.5%-1.9% of Al, the hot dipping temperature ranges from 440 DEG C to 460 DEG C, and the furnace nose dew point of hot dipping ranges from-30 DEG C to-20 DEG C; and the steel plate with the zinc-aluminum-magnesium coating on the surface is subjected to finishing treatment under the set rolling force, and the low-aluminum zinc-aluminum-magnesium coating plate is obtained. The number of hectometer zinc ash of the zinc-aluminum-magnesium c