Aluminum alloy capable of digesting high-hardness compounds and smelting method of aluminum alloy

Abstract

The invention discloses an aluminum alloy capable of digesting high-hardness compounds and a smelting method of the aluminum alloy. The method comprises the following steps of: heating aluminum ingots or molten aluminum till complete melting; adding Si, Fe, Cu, 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 LaH3 powder into the alloy melt in a fluidized form together with the gas; stirring to make the LaH3 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 an aluminum alloy and a melting method thereof. Background technique

[0002] According to statistics, among the more than 500 kinds of deformed aluminum alloy materials in the world, there are less than 20 aluminum alloys commonly used for melting and casting large ingots. Among them, the aluminum alloys most commonly used for melting and casting large ingots and producing thick plates are 5083, 5026, and 6082 , 2017, 2024, 2219, 7075, 7050, etc. Among these materials, 2XXX series and 7XXX series belong to the category of duralumin and super duralumin, and their thick plates are mostly used in the aerospace industry, but their performance in melting and casting large ingots is very poor. Poor, the forming rate of flat ingot and round bar is very low; 5XXX series and 6XXX series alloys have good casting performance, but low strength; other aluminum alloys such as 1XXX series and 3XXX series belong to the category of soft alumin...