Preparation method for plate for aluminium alloy carriage

Abstract

The invention provides a preparation method for a plate for an aluminium alloy carriage. The preparation method comprises the following contents that: (1) the plate for the aluminium alloy carriage comprises the following components: 0.05 to 0.4 weight percent of Si, 0.15 to 0.45 weight percent of Fe, 0.03 to 0.15 weight percent of Cu, 0.3 to 0.6 weight percent of Mn, 4.6 to 5.8 weight percent of Mg, 0.03 to 0.15 weight percent of Cr, 0.01 to 0.03 weight percent of Ti, and the balance of Al and unavoidable impurities; (2) a manufacturing method comprises the following steps: taking aluminium ingots, aluminium intermediate alloy ingots, magnesium ingots, a manganese agent, a copper agent and a chromium agent as raw materials; performing low liquid level casting after smelting, preserving heat, degassing, and double-stage deep bed filtering are performed; and performing the processes of sawing and surface milling, heating, hot rolling, cold rolling, cleaning, annealing, stretching and straightening, and transversely shearing to obtain the plate for the aluminium alloy carriage. The obtained plate for the aluminium alloy carriage has high strength, a flat and neat plate shape, and good corrosion resistance, good bending machining performance and welding performance.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metals, and in particular relates to a preparation method of an aluminum alloy carriage plate. Background technique [0002] At present, most of the freight semi-trailers and small vans are made of corrugated steel plates, and a small amount of them are made of aluminum plates or aluminum profiles. Cars made of steel plates are heavy, poor in fuel economy, poor in corrosion resistance, and have no recycling value; the production process requirements for spliced ​​aluminum profiles are complex, and the weight reduction effect is not obvious enough; the splicing process of aluminum plates is relatively simple, and the weight reduction effect is obvious , but the strength is not high enough to easily deform, and it is prone to cracking when bending. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the existing aluminum alloy carriage pl...

AI Technical Summary

Problems solved by technology

Cars made of steel plates are heavy, poor in fuel economy, poor in corrosion resistance, and have no recycling value; the production process requirements for spliced ​​aluminum profiles are complex, and the weight reduction effect is not obvious enough; the splicing process of aluminum plates is relatively simple, and the weight reduction effect is obvious , but the strength is not high enough, it is easy to deform, and it is easy to crack when bending