Production process for hot-dip aluminium-zinc alloy plate

Abstract

The invention discloses a production process for a hot-dip aluminium-zinc alloy plate, and belongs to the field of metal material preparation. The hot-dip aluminium-zinc alloy plate consists of a steel plate base material and an aluminium-zinc alloy clad layer, wherein the steel plate base material is a cold continuous rolling carbon steel baseplate, and the aluminium-zinc alloy plating comprises the following components in percentage by weight: 10% to 15% of AL, 0.3% to 0.5% of Si, 0.2% of Re, 0.5% of Mg and 83% of Zn. In the preparation of an aluminium-zinc alloy clad plating solution, a 500 KW inductor is adopted to heat and stir the aluminium-zinc alloy, and the temperature of the aluminium-zinc alloy solution is kept to be 460 to 600 DEG C; the cold continuous rolling carbon steel baseplate is heated to be above 700 DEG C in an annealing furnace to be performed annealing and recrystallization, and then conducted surface reduction activation under a high hydrogen atmosphere. The process adopts the aluminium-zinc alloy with low aluminium content as the plating, and then is combined with a specific production process and a heat treatment process, the surface of the cold rolled steel cold-roll steel sheet is combined and fully reacted with the aluminium-zinc alloy, the produced aluminium-zinc alloy plate has excellent tensile strength, elongation and hardness, meanwhile the production cost is reduced, and the production process can be widely applied to the field of rolled steel plates.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to a production process of a hot-dip aluminum-zinc alloy plate. Background technique [0002] At present, in the field of metal manufacturing technology, in order to improve the corrosion resistance, wear resistance and heat resistance of the cold-rolled steel sheet surface, the surface of the cold-rolled steel sheet is usually hot-dip galvanized with an Al-Zn alloy layer. As a wear-reducing material, Al-Zn alloy gradually replaces the expensive Sn and Pb alloy, and then gradually replaced tin bronze with the lack of copper resources, aluminum-zinc alloy has good mechanical properties, excellent casting process performance, low raw material cost and low melting energy consumption, no pollution to the environment. Advantages, more and more favored by the industry. However, the current production process of hot-dip Al-Zn alloy sheet has the following problems: the aluminum c...

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Problems solved by technology

[0003] The invention provides a production process of a hot-dip aluminum-zinc alloy plate to solve the problems of high production cost and poor product strength in the prior art