Manufacturing process for high-strength corrosion-resistant aluminum alloy forged piece

Abstract

The invention discloses a manufacturing process for a high-strength corrosion-resistant aluminum alloy forged piece. The process comprises the following steps of material preparation, heating, multi-axial forging, mechanical machining, heating, trestle bearizing, heating, ring rolling, mechanical machining, annealing, solid-solution water-quenching, cold pressing deformation, aging and the like. The aging treatment method comprises the steps of first-grade aging, specifically, a ring forged piece subjected to cold pressing is put into a furnace at the room temperature and heated to 90-110 DEGC, heat preservation is performed for 1-3 hours, and air cooling is performed; second-grade aging, specifically, the ring forged piece is put into the furnace when the temperature is reached, heat preservation is performed for 4-8 hours at the temperature of 150-160 DEG C, and air cooling is performed after aging is ended.

Description

technical field [0001] The invention relates to an aluminum alloy forming and heat treatment process, in particular to a production process suitable for a 2A14 high-strength, corrosion-resistant aluminum alloy ring forging. Background technique [0002] 2A14 aluminum alloy is an Al-Cu-Mg series high-strength forging alloy. This alloy has the advantages of good process performance, good thermoplasticity and good heat resistance. It is mainly used for structural parts with complex shapes or heat-resistant and weldable, free forgings and precision Die forgings are important materials in fields such as aerospace and transportation. With the rapid development of my country's aerospace industry, the demand for the use of 2A14 aluminum alloy ring forgings is increasing, and the requirements for the uniformity and stability of the structure and performance of the rings are getting higher and higher. higher requirements. In production, although the shape of 2A14 aluminum alloy ring ...

AI Technical Summary

Problems solved by technology

The traditional free forging + machining forming method has low production efficiency, low material utilization rate, requires a large tonnage, and the deformation is uneven, and the deformation is not easy to control; the existing multi-axis forging + ring rolling process, due to forging, Due to the forming characteristics of the ring rolling process, 2A14 aluminum alloy ring forgings have problems such as uneven deformation in all directions, inconsistent deformation, and large anisotropy of the structure and properties. The anisotropy of the mechanical properties is particularly obvious, especially the radial elongation. The situation where the product is unqualified due to low

Although the performance after the optimized heat treatment process can meet the technical requirements, due to the directionality of the structure of the ring forging, the mechanical properties in the three directions of cutting, diameter and axis are inconsistent, especially the elongation is very low, and the margin is small. If there are fluctuations, the product performance will be unqualified, so it is difficult to meet the requirements for its use in the aerospace field

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