Research Of The Influence Of Component,Microstructure And Impact Energy On The Impact Corrosion And Abrasion Mechanisms Of Steels Used In Wet-grinding Machine Lining Board

The costs associated with wear processes place a significant burden upon many sectors of industry and the community. Several studies have indicated that the abrasion and corrosion in the mineral processing industries are areas for research priority owing to their significant impact on metal wastage and maintenance costs. It was against this background that the present study was initiated, whose aim was to study the wear mechanism of the steels used in wet-grinding machine liner for the mining processing industries .In this study, we first tested the resistance of low carbon high alloy steel used in wet-grinding machine lining board to high impact corrosion and abrasive wear, and for comparison, the high manganese steel and the medium carbon alloy steel were also tested. The test was carried out by a modified MLD-10 tester. The test methodology very well simulated the working condition of metallurgical industry. we discussed the behavior of impact corrosion and abrasion of the three steels in simulated metallurgical conditions. The results showed that under the ironstone slurry, the wear loss of the low carbon high alloy steel in different impact energy was lower than the high manganese steel and the medium carbon alloy steel. And with the increased test time, the superiority of the low carbon high alloy steel was well illuminated.At last the worn surface of the low carbon high alloy steel high manganese steel and medium carbon alloy steel was studied by Hitachi-x-650 SEM(Scanning Electronic Microscope) in this paper, and the subsurface microstructures of the three steels were analyzed through Olympus optical microscope, finally we definitely discussed the wear mechanism of the three steels. The results showed that the impact energy had great effect on the impact corrosion and abrasion mechanism of the three steels. At impact energy of 2.0J, the impact corrosion and abrasion mechanism of low carbon high alloy steel mainly was micro-cutting in short time, with the increasing time, the mechanism changed to shallow fatigue spalling, the impact corrosion and abrasion mechanism of high manganese steel was accumulating deformation fatigue spalling and corrosion wear, the mechanism of medium carbon alloy steel was shallow brittle spalling and corrosion wear.Atimpact energy of 2.7J, the impact corrosion and abrasion mechanism of low carbon high alloy steel mainly was micro-cutting and slight corrosion wear, with the increasing time, the mechanism changed to shallow fatigue spalling and also slight corrosion wear, the impact corrosion and abrasion mechanism of high manganese steel was fatigue spalling and heavy corrosion wear, the mechanism of medium carbon alloy steel was heavy brittle spalling and corrosion wear. At impact energy of 3.5J, the impact corrosion and abrasion mechanism of low carbon high alloy steel was fatigue spalling and relatively slight corrosion wear, the failure mechanism of high manganese was large deep spalling of the work -harding layer due to the work hardening at high impact energy and corrosion wear, the failure mechanism of medium alloy steel was large brittle spalling and heavy corrosion wear.