6082 aluminum alloy melted with cuh and preparation method of aluminum alloy

Abstract

The invention discloses a 6082 aluminum alloy melted with CuH and a preparation method of the aluminum alloy. The method comprises the following steps of: heating aluminum ingots or molten aluminum till complete melting; adding Si, Fe, Mn, Mg, Cr, Zn and Ti, and completely dissolving and melting the elements; preserving the heat at the temperature of between 700 and 1,000 DEG C after refining, and obtaining an alloy melt; performing degassing purification operation on the alloy melt by using nitrogen or inert gas or mixed gas of the nitrogen and the inert gas in a random ratio, and continuously introducing the gas till the reaction is finished; adding CuH powder into the alloy melt in a fluidized form together with the gas; stirring to make the CuH distributed uniformly in the alloy melt and fully reacted with the alloy melt; and standing, regulating the temperature to 680-730 DEG C, and discharging the molten alloy for casting. By the method, the defects of the properties of the conventional aluminum alloy can be overcome, the toughness, the forming property and the hardening capacity of the aluminum alloy are improved, and a high-end base material is provided for efficient deep processing.

Description

technical field

[0001] The invention relates to a high-strength aluminum alloy and a preparation method thereof. Background technique

[0002] Copper (Cu) is the most important and basic alloying element in all heat-treatable aluminum alloys. It mainly forms a soluble metal compound strengthening phase with other elements to improve the strength and heat resistance of the alloy. Copper in the 6XXX series alloys can compensate for the strength loss caused by the parking effect and can refine the Mg 2 Si, to increase the strength of the T6 state.

[0003] However, when the Cu content in the 6XXX series alloy exceeds 0.5% (mass percentage), it is easy to produce coarse second phase particles and eutectic structure in the casting process, as well as the inhomogeneous concentration of components inside the solid solution.

[0004] The characteristics of various non-metallic inclusions and microporosity that hinder the diffusion of the second phase determine that the cast alumin...