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

Abstract

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%.

Description

technical field [0001] The invention relates to an aluminum alloy preparation process, in particular to a preparation method for a spray-formed 1420 aluminum-lithium alloy hollow ingot. Background technique [0002] Lightweight is an eternal theme in the development of weapons and equipment, especially in aerospace equipment, where structural weight reduction has a significant effect on model performance and comprehensive technical level. At present, the country's aerospace equipment has more and more demands for full-size components, and most of the full-size components are hollow structures with large specifications and sizes. It is complicated and difficult to prepare hollow components with traditional solid ingots. [0003] However, in the production of aluminum-lithium alloys in the prior art, the chemical composition is not uniform, and the composition is macroscopically segregated during the casting process. Requires solvent coverage, causing solvent inclusions. Dis...

AI Technical Summary

Problems solved by technology

At present, the country's aerospace equipment has more and more demands for full-size components, and most of the full-size components are hollow structures with large specifications and sizes. It is complicated and difficult to prepare hollow components with traditional solid ingots.

[0003] However, there are inhomogeneous chemical components in the production of aluminum-lithium alloys in the prior art, and macroscopic segregation of components in the casting process

Requires solvent coverage, causing solvent inclusions

Disadvantages such as uneven ingot structure

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