Machining process of 5083 aluminum alloy profile for ship

Abstract

The invention belongs to the technical field of aluminum alloys and relates to a machining process of a 5083 aluminum alloy profile for a ship. By directly performing manual annealing treatment on thealuminum alloy profile after online extruding is completed, the annealing regime is (320-350)DEG Cx(3-5)h, a material is made to be converted into an annealing structure from an extruding deforming structure, the surface hardness of a product is decreased to 26 HRB or so from 30 HRB under the extruding state, by means of treatment of the early stage annealing process, the hardness of the materialis made lowered, the machinable or stretchable performance of the later period is made improved, and the material becomes softer; according to the stretching process after annealing, when the extruded profile length is 25000 mm, the displacement range of the stretching stroke of a stretching machine is set as 1250-2250 mm, the stretching speed range is set as 40-20 mm / s, the stretching deformingrate is 5-9%, after the extruded 5083 aluminum alloy profile is subjected to stretching machining, according to the mechanical performance of the 5083 aluminum alloy profile, the yielding strength islarger than and equal to 215 MPa, the tensile strength is larger than and equal to 300 MPa, the percentage elongation is larger than or equal to 10%, and the mechanical performance of the 5083 aluminum alloy profile completely meets the performance requirement under the 5083-H116 state.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a processing technology for marine 5083 aluminum alloy profiles. Background technique [0002] The working environment of the ship requires its structural materials to have comprehensive properties such as high specific strength, toughness, corrosion resistance, fatigue resistance, impact resistance and good weldability, especially for ships driving in the marine environment, because seawater contains a large amount of Cl - , is a typical electrolytic solution with strong corrosiveness. Under such a strong corrosive environment and stress, marine materials are required to have excellent resistance to electrochemical corrosion and stress corrosion resistance. Among traditional materials, although steel and polymer-based composite materials are widely used in shipbuilding, aluminum alloy materials have a series of comprehensive properties that steel and polymer materials do n...

AI Technical Summary

Problems solved by technology

[0006] In view of this, in order to solve the problem that the existing 5083 extruded sheet can only produce products in the 5083-H112 state, and the yield strength of the product in the 5083-H112 state is too low to meet the needs of ships and ships, the present invention provides a Processing Technology of 5083 Aluminum Alloy Profile for Ships