Research On The Wear Resistance And High Temperature Performance Of Wrought Aluminum Alloy

Aluminum alloy has Low density,high intensity and good plasticity, excellent conductivity,thermal conductivity and resistance to corrosion, widely used in industry, usage amount rank only second to steel.Cast aluminum alloy has plenty of eutectic type Si element, good abrasion resistance, but poor mechanical properties, used mostly in scope in manufacturing aviation equipment, daily necessities, building doors and windows, etc. Press-working of deformation aluminium alloy with good mechanical properties, in industries have found application under many bear parts. Now there has been some reports for pure aluminum mechanical deformation, in addition to the Al-Si alloy, especially wear has quite a lot of research. However, seldom related dry friction properties of aluminum deformation. Research on deformation aluminium alloy tribological properties, all are based on its surface modification process in compliance with performance after the determination of aluminum matrix deformation, the research on very little resistance.This article mainly aims at five kinds of deformation aluminum alloy and martensitic stainless steel and the austenitic stainless steel composed of friction pair.In dry friction condition without lubrication friction tester M2000 in the dry friction and wear performance in 15 degrees in temperature, humidity to 40g/m3 in the laboratory. In the same dry friction condition,200N fixed load,rotate speed 200r/min (0.424m/s) experiment for friction and wear process 2 hours, each deformation aluminum alloy in experimental conditions test five times. M2000 friction and wear tester obtain Friction coefficient and the volume wear rate by weighing method,than analysis the data,compare with wear, by scanning electron microscope (SEM) to observe its wear surface, spectrometer analysis of surface composition, the internal relations for microscopic structurematrix,mechanical properties and the friction and wear of deformation aluminum friction,in order to obtain friction and wear mechanism, get the following conclusion:Five kinds of deformation of aluminum alloy and martensitic stainless steel's average friction coefficient in between 0.3～0.4, five kinds of deformation of aluminum alloy and austenitic stainless steel's average friction coefficient in between 0.4～0.5. The numbers of A#, E# have lower friction coefficient and volume wear rate,in the foxed load plastic deformation and processing sclerosis occurred. Deformation of aluminum alloy friction and wear process can be divided into three stages.The first stage, minor abrasion stage; The second stage, mechanically mixed layer forming stage;The third stage, mechanically mixed layer forming, peeling wear.Deformation aluminum alloy'swear mechanism to give priority to adhesive wear,abrasive wear, at the same time with oxidation wear. Abrasive wear due to the differences between material properties and show delamination wear,massive spalling and reinforced particle spalling and crushing several wear form.In the machining process, the sample size is an important factor that effects the deformation aluminum alloy, that is, the differences of properties due to the differences of the sample size. Tube type deformation aluminumn alloy and rod type deformation aluminum alloy's the yield strength and plastic roughly the same trend in the high temputure.The alloy drop the yield strength and plastic with the increase of temperature, the diameter is 50mm of rod type deformation aluminum alloy's the yield strength and plastic more than the diameter is 80mm of tube type deformation aluminumn alloy when temputure less than or equal to 200℃.Not only has yield phenomenon but also the diameter is 50mm of rod type deformation aluminum alloy's the yield strength and plastic less than the diameter is 80mm of tube type deformation aluminumn alloy when temputure is 250℃or 300℃.The tube type deformation aluminumn alloy's the yield strength and plastic less than tube type deformation aluminumn alloy's.