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.