A kind of high-strength aluminum alloy material and preparation method thereof
An aluminum alloy material, high-strength technology, applied in the field of aluminum alloy preparation, can solve problems such as affecting the yield strength, brittleness and plasticity of aluminum alloys, no specific solutions are proposed, and extrusion production efficiency is reduced, and achieves a small aggregation tendency. , improve strength and toughness, improve the effect of shape
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Embodiment 1
[0034] A high-strength aluminum alloy material, the aluminum alloy material includes the following elements by mass percentage: Si0.7wt%, Fe≤0.50wt%, Cu 0.05wt%, Mn≤0.5wt%, Mg 1.2wt%, Cr≤ 0.05wt%, Zn≤0.2wt%, Ti≤0.1wt%, the balance is Al and other unavoidable impurities; wherein, the Mn element is added in the form of Al-Mn master alloy, and the Cr element is added in the form of Al-Cr The master alloy is added, and the Al-Mn master alloy and the Al-Cr master alloy work together to refine the α-Al embryo, the eutectic silicon cluster and the iron-rich phase.
[0035] In addition, the preparation method of the high-strength aluminum alloy material includes the following steps:
[0036] a. adopt endogenous method to prepare Al-Mn master alloy and Al-Cr master alloy respectively; In the present embodiment, the method for described endogenous method to prepare Al-Mn master alloy is the Mn powder that is 1:3 according to weight Put the aluminum powder into a ball mill for ball mill...
Embodiment 2
[0044] A method for preparing a high-strength aluminum alloy material, comprising the steps of:
[0045] a. adopt endogenous method to prepare Al-Mn master alloy and Al-Cr master alloy respectively; In the present embodiment, the method for described endogenous method to prepare Al-Mn master alloy is the Mn powder that is 1:3 according to weight Put the aluminum powder into a ball mill for ball milling, and mix the materials for 8 hours at a speed of 75r / min. Wrap the evenly mixed Mn powder and aluminum powder with aluminum foil, put them into the mold, and apply unidirectional axial The pressure is 100 MPa, and the pressure is maintained for 5 minutes, then heated to 1000 ° C, cooled to room temperature to obtain an Al-Mn master alloy, and the average particle size of the Mn powder and aluminum powder after ball milling is 45 μm; the inner The method of preparing Al-Cr master alloy by raw method is to put Cr powder and aluminum powder in a ball mill with a weight ratio of 1:5...
Embodiment 3
[0054] A method for preparing a high-strength aluminum alloy material, comprising the steps of:
[0055] a. adopt endogenous method to prepare Al-Mn master alloy and Al-Cr master alloy respectively; In the present embodiment, the method for described endogenous method to prepare Al-Mn master alloy is the Mn powder that is 1:3 according to weight And the aluminum powder is put into a ball mill for ball milling. Under the condition of the rotating speed of 60r / min, the mixture is mixed for 5 hours, and the evenly mixed Mn powder and aluminum powder are wrapped with aluminum foil, put into the mold, and the unidirectional axial The pressure is 65 MPa, and the pressure is maintained for 3 minutes, then heated to 960 ° C, cooled to room temperature to obtain an Al-Mn master alloy, and the average particle size of the Mn powder and aluminum powder after ball milling is 35 μm; the inner The method for preparing the Al-Cr master alloy by the raw method is to put Cr powder and aluminum...
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