Research On Continuous Rheo-extrusion Of Conductive Material Aluminum Alloy

Based on the production and the current condition of alloy conduction, high-quality 6201 conductive material was prepared by utilizing continuously rheologic extrusion in the paper; The process and theory of alloy pipe by the method of formation of continuously rheologic extrusion, cold drawing treatment, heat processing and formation techonology were studied by using DZJ-350 continuously rheologic extrusion machine,SANSI electrical tensile testing machine,dural purpose electrical bridge of QJ36,OLYMPUS metalloscope analytical methods and so on. Main work and results were as follows:(1) It disclosed that processing parameter had effect on the lawof texture(microstructure) and performance by continuously rheologic extruding; Tiny equiaxed grain could be gained by continuously rheologic extruding on line and solid solution, crystal grain was rough, strength of tension and elongation percent reduced, specific conductance lifted with the rise of the point of pouring; The synthetical mechanical property and conductive property were improved by T8 aging treatment; The alloy aging velocity and conductive property improved, while mechanical property reduced with the aging temperature higher; The 6201 alloy had high strength and specific conductance with thermomechanical treatmentat at 150℃.(2) The optimal techonology of 06mm 6201 alloy wire was designed by continuously rheologic extrusion in the paper. The point of pouring arranged from 720℃to 740℃, cold water flux arranged from 15 to 20L/min, the temperature of on line solid solution was 520℃, cooling rate was 30℃/s, aging temperature was 150℃, aging time arranged from 10 to 14h, the 6201 alloy wire of T6 treatment tensile strength was 320MPa, elongation was 7.8%, electrical resistivity was 31.5 nΩ.m; The tensile strength, elongation and electrical resistivity increases by 11.1%,17% and 0.2% according to standard of our country.(3) The low temperature thermomechanical treatment was designed; the tensile strength, elongation and conductance of T8 and T9 is 327MPa,14% and 33.4nQm;336MPa,7.5% and 31.3 nΩm.The tensile strength and specific conductance of the 6201 alloy wire of T8 treatment increased by 5.6% and 1.43% respectively compared to continuous metal cast and tandem rolling of solid solution on line. The tensile strength and specific conductance of the 6201 alloy wire of T9 treatment increased by 6.2% and 1.1% respectively compared to the continuous metal cast and tandem rolling on line.(4) Craft and programme of continuous rheologic extrusion forming was designed in the paper; The optimal craft parameter ofΦ80×10mm pipes was determines and the pipes of 6201 alloy was prepared successfully. The point of pouring arranged from 760℃to 780℃, the preheating temperature arranged from 450℃to 500℃.(5) The deficiency formatting mechanism of 6201 alloy's continuous rheologic extrusion was explored in the paper and the effective precautionary measures was designed.