Preparation method for rolled magnesium-aluminum laminated plate prefabricated blank

Abstract

The invention discloses a preparation method for a rolled magnesium-aluminum laminated plate preformed blank, and belongs to the technical field of metal composite plate preparation. The preparation method is characterized by comprising the following implementation steps that S1, a magnesium plate is placed into a heating furnace, and subjected to heat preservation for 0.5 h at the temperature of300 DEG C and annealing treatment; S2, an aluminum plate is placed into the heating furnace, and subjected to heat preservation for 1 h at the temperature of 350 DEG C and annealing treatment; S3, thesuperposed surface of the above magnesium plate and the above aluminum plate is ground and washed in the rolling width direction; S4, the aluminum plate is folded in half and bent, the magnesium plate is placed into the bent aluminum plate, and the bent end is fixed with an aluminum rivet to form a "sandwich" structure; and S5, the above "sandwich" structure combined blank is placed into the heating furnace, subjected to heat preservation for 10 min-30 min within the temperature range of 350 DEG C-400 DEG C, and then immediately placed into a press machine to be pressurized at a constant speed, or fed into a rolling mill to be rolled. The preparation method has the advantages that the temperature is carried out, and pressurizing is carried out, so that a tightly-attached pre-composite surface is formed between the magnesium-aluminum plates, the high-temperature oxidation of a to-be-composited interface in the hot rolling process is limited, and the cooperative deformation capacity ofbimetal is improved.

Description

Technical field: [0001] The invention belongs to the technical field of metal composite plate preparation, and in particular relates to a method for preparing a rolled magnesium-aluminum laminate preform. Background technique: [0002] Magnesium alloys have many advantages such as light weight and high strength, but they have poor plasticity and corrosion resistance, and are prone to cracks during machining; aluminum alloys and magnesium alloys have high mutual solubility, and good ductility and corrosion resistance, so they can be used as magnesium alloys. Magnesium-aluminum laminates (composite panels and multilayer composite panels) are prepared from reinforced materials. In recent years, with the continuous deepening of research, the mechanical properties of magnesium-aluminum alloys have been greatly improved, and magnesium-aluminum laminates with light weight and excellent performance can be prepared, which can be used in lightweight designs for various occasions. The...

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Problems solved by technology

Magnesium-aluminum rolling and compounding requires a large cumulative deformation to extrude fresh metal and high temperature to promote the diffusion and bonding of dissimilar atoms. During the rolling process, it was found that magnesium alloys are more sensitive to rolling temperature, and low rolling temperatures are prone to cracks and edges. Cracks will affect the compounding of the interface and the utilization rate of raw materials. If the rolling temperature is high, the compounding surface will be easily oxidized, which will affect the bonding effect of the interface. The aluminum alloy has better plastic deformation ability and is less affected by the rolling temperature. The surface damage gradually appears due to the increase of cumulative deformation. In the process of preparing magnesium-aluminum laminates, special attention should be paid to the setting of temperature and reduction ratio between rolling passes

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