Effect of Solution Aging Treatment on Mechanical and Friction and Wear Properties of QAl10-3-1.5 Alloy
The friction and wear behavior of as-extruded and as-aged QAl10-3-1.5 alloy under dry sliding conditions is investigated using MFT-5000Rtec friction and wear tester.The microstructure characteristics and friction and wear mechanism of QAl10-3-1.5 alloy are analyzed using profilometer,metallurgical microscope and X-ray diffractometer.The results show that the tensile strength of as-extruded samples is about 680 MPa,which is increased by 60 MPa after solution aging treatment at 850℃×60 min(water cooling)+550℃×4 h,the elongation after fracture is increased by 1%,and the Brinell hardness increases from 136 HBW to 160 HBW;under loads of 10,20 and 30 N,the as-extruded samples shows a large amount of spalling under cyclic loading,and the average friction coefficient of as-extruded samples is about 10%lower than that of as-aged samples;the width and depth of wear spots on as-aged samples are lower than those of as-extruded samples,the wear resistance is significantly improved,and the larger the load,the more significant the improvement of wear resistance.
rolling bearingaluminum bronzeaging treatmentmechanical propertyfriction coefficientwear rate
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