Study On Dry Contact Abrasive Wear Based On Metal Friction Pairs

In mechanical production,the proportion of mechanical and electrical equipment damage caused by wear is as high as 70%,and abrasive wear can account for more than half of the wear failure,which has become the most common cause of mechanical equipment failure.Wear is one of the main research problems in tribology,and abrasive wear theory is an important branch of wear theory,which has great engineering significance for the study of abrasive wear mechanism.Based on the research and development project of cladding equipment ofQingdao Jinhaina plasma technology company of Shandong University of Science and Technology,the wear mechanism and micro-characteristics of steel-aluminium friction pairs were studied:Firstly,the abrasive wear process is analyzed theoretically,and the working conditions of the formulas of abrasive wear rate put forward by predecessors are improved.On this basis,three kinds of abrasive wear rate calculation formulas are put forward,and the influence degree of each noise factor on abrasive wear rate is analyzed by using MATLAB software.Secondly,ABAQUS finite element software was used to simulate the damage process of surface materials when three kinds of abrasives were extruded at different cutting angles,and the equivalent plastic strain and Mises equivalent stress were analyzed.At the same time,according to the morphological characterization of three kinds of abrasives,the influence of abrasive morphology characterization and geometrical parameters on the wear of the parts at this stage was investigated.Finally,according to the simulation process,three kinds of abrasive wear formula are proposed.Then,ABAQUS finite element software is used to simulate the cutting condition of three kinds of abrasive particles on the surface material of parts under low cycle reciprocating wear,and the equivalent plastic strain,Mises equivalent stress analysis and energy change analysis are carried out.The wear rate formula of single abrasive particles in the second cutting of parts is proposed.At the same time,the change of temperature rise along the abrasive trajectory is analyzed,and the effects of abrasive physical properties and morphological characteristics on friction heat and wear heat generation on mechanical properties of metal parts are clarified.Finally,abrasive wear experiments were carried out on aluminium alloy specimens,and the micro-morphology of the specimens after wear was observed and analyzed.The wear resistance of various materials was tested by plasma cladding technology and the data were comparred,and the relative wear resistance ratio ol’ these materials was obtained.