The invention relates to a high-strength aluminum-lithium alloy profile for aerospace and a preparation method of the high-strength aluminum-lithium alloy profile The high-strength aluminum-lithium alloy profile for the aerospace and the preparation method of the high-strength aluminum-lithium alloy profile aim to solve the problems that an aluminum and lithium alloy produced through an existingprocess is large in casting forming difficulty, and the strength of the existing aluminum and lithium alloy is low The high-strength aluminum-lithium alloy profile for the aerospace is composed of Cu, Li, Ti, Zn, Ti, Mg, Zr and Al; and impurity elements are Mn, Fe and Si The preparation method includes the steps that firstly, raw materials are weighed and taken; secondly, molten aluminum alloy is obtained due to smelting; thirdly, refining is performed after Al-Ti-B wires are added; fourthly, spraying forming is performed; fifthly, aluminum alloy short bars are formed due to cutting; sixthly, blind die extruding is performed so that extruded blank is obtained; seventhly, the extruded blank is extruded into a bar material; eighthly, extruding is performed again so that the profile is obtained; ninthly, the profile is subjected to quenching; tenthly, stretching and straightening are performed; and eleventhly, ageing treatment is performed, and the aluminum-lithium alloy profile is obtained The preparation method is mainly used for preparing the high-strength aluminum-lithium alloy profile for the aerospace

High-strength aluminum-lithium alloy profile for aerospace and preparation method of high-strength aluminum-lithium alloy profile

The invention provides a preparation method for a 1420 aluminum lithium alloy hollow ingot blank molded through injection. The preparation method comprises the following steps that the raw materials of aluminum metal, lithium metal, magnesium metal and zirconium metal are smelted in a primary smelting furnace to form a liquid metal mixed solution; primary deslagging and degassing is carried out; the liquid metal mixed solution is subjected to heat preservation in a tundish, and secondary deslagging and degassing is carried out; in the tundish, the liquid metal mixed solution is atomized in aninert atmosphere to form a particle jet flow, technical parameters of injection equipment are adjusted, the particle jet flow is controlled to be deposited on a substrate at a high speed, and a 1420 aluminum lithium alloy hollow blank material is molded through solidification; the 1420 aluminum lithium alloy hollow blank material molded through injection is naturally cooled, and residual stress iseliminated; and a finished product is obtained through turning and demolding. According to the preparation method, after the aluminum lithium alloy hollow ingot blank is prepared and a correspondinghot working process and a corresponding heat treatment process are carried out, the tensile strength exceeds 490 MPa, the yield strength exceeds 340 MPa, and the elongation percentage is greater than10%.

Preparation method for 1420 aluminum lithium alloy hollow ingot blank molded through injection

The invention discloses a preparation method of an aluminum-lithium alloy super-plastic fine-grain plate The preparation method comprises the following steps that a plate blank with improved processplasticity is put into rolling equipment, high-temperature rolling deformation is carried out, a hot-rolled plate is formed; the hot-rolled plate is taken out from the rolling equipment, solid solution quenching treatment is carried out; the hot-rolled plate which is subjected to solution quenching treatment again is put into the rolling equipment, room-temperature rolling deformation is carried out, the plate is formed; the plate rolled at the room temperature is taken out from the rolling equipment, overaging treatment is carried out; the aluminum-lithium alloy plate after overaging treatment is put into the rolling equipment, low-temperature rolling is carried out; and the plate obtained after low-temperature rolling is taken out from the rolling equipment, recrystallization annealing treatment is carried out, then air cooling is carried out, and the aluminum-lithium alloy super-plastic fine-grain plate is prepared According to the preparation method of the aluminum-lithium alloy super-plastic fine-grain plate, the process plasticity of the aluminum-lithium alloy plate blank is improved through cogging in a forging and pressing mode, and then the aluminum-lithium alloy super-plastic fine-grain plate which is small in grain size (6 to 10 mum) and uniform in size distribution is prepared through the processes of high-temperature rolling, solid solution quenching, room-temperature rolling, overaging treatment, low-temperature rolling, recrystallization annealing and the like

Preparation method of aluminum-lithium alloy super-plastic fine-grain plate

The invention provides an ultra-light and high-strength cast aluminum lithium alloy and a preparation method thereof in order to solve the technical problem that the advantageous performance of low density and high strength of an aluminum lithium alloy in the prior art cannot be simultaneously realized. The ultra-light and high-strength cast aluminum lithium alloy is prepared from the following components in percentage by mass: 2.5-3.5% of Li, 5.2-9.2% of Mg, 0.08-0.20% of Zr, 0.08-0.30% of Sc, a small amount of impurity elements and the total content of the impurity elements is less than 0.25%, and the balance of Al. According to the ultra-light and high-strength cast aluminum lithium alloy and the preparation method thereof, the density of the aluminum lithium alloy can be further reduced, and the high strength can be realized at the same time.

Ultra-light and high-strength cast aluminum-lithium alloy and preparation method thereof

The invention discloses an aluminum lithium alloy for a large-depth pressure bearing shell and a preparation method of the aluminum lithium alloy. The alloy comprises the metal materials in percentageby mass: 1.0-1.5% of Li, 3.2-5.0% of Cu, 0.2-1.0% of Mg, 0.4-0.9% of Ag, 0.08-0.18% of Zr, 0.1-0.5% of Mn, 0.2-1.0% of Zn, less than or equal to 0.05% of Si, less than or equal to 0.8% of Fe, less than or equal to 0.1% of Ti, and the balance of Al. The preparation method includes the following steps of (1) batching; (2) preparation of an alloy ingot blank through spray forming; (3) extruding; (4)forging and upsetting; (5) reverse extruding; (6) thermal treatment; and (7) distressing aging. High-quality melt with high cleanliness and less hydrogen content is prepared through argon-shield smelting and furnace refining, the aluminum lithium alloy cast ingot with high metallurgical quality is prepared through spray deposition and electromagnetic stirring technologies, and the spray deposition technology solves the problems of non-uniform structure and macroscopic segregation of the aluminum lithium alloy cast ingot. According to the specification of the prepared aluminum lithium alloy ingot blank, the diameter is greater than phi 550 mm, the shape is regular, the density is high, and the chemical compositions are uniform and free of macroscopic segregation.

Aluminum lithium alloy for large-depth pressure bearing shell and preparation method of aluminum lithium alloy

The invention relates to an aluminum lithium alloy for spaceflight and an aluminum lithium alloy proximate matter preparing method, and relates to the aluminum lithium alloy and the aluminum lithium alloy proximate matter preparing method. The aim is to solve the problems that the production difficulty of the aluminum lithium alloy is large, and the aluminum lithium alloy strength is low. The aluminum lithium alloy is composed of Mg, Li, Ti, Zr and Al, the Mg accounts for 5.5%-6.5%, the Li accounts for 2.2%-2.5%, the Ti accounts for 0.03%-0.12%, the Zr accounts for 0.15%-0.20%, the Zr+Ti is smaller than or equal to 0.25%, and the balance is the Al. The method includes the steps of raw material weighing, aluminum alloy molten liquid preparing, refining, spray forming, short bar cutting, blind die extrusion, heat extrusion, quenching, tension leveling and aging treatment. According to the aluminum lithium alloy and the aluminum lithium alloy proximate matter preparing method, through spray forming, the problems that the aluminum lithium alloy production difficulty is large, and the quality is poor are solved, the strength of extension reaches 485 Mpa, the ruled non-proportional extending strength reaches 345 Mpa, the percentage elongation after fracture reaches 10.0%, and blind die extrusion enables a casting ingot to be more compact.

Wang Dongcheng

Papers

Aluminum lithium alloy for spaceflight and method for preparing proximate matter through aluminum lithium alloy