Effect of abrasive particle size on abrasive wear of hardfacing alloys

Abstract

Abstract:Hardfacing is one of the most useful and economical ways to improve the performance of components submitted to severe wear conditions. This study has been made for the comparison of microstructure and abrasion resistance of hardfacing alloys reinforced with chromium carbides or complex carbides. The hardfacing alloys were deposited onto ČNS EN S235JR low carbon steel plates by the gas metal arc welding (GMAW) method. Different commercial hardfacing electrodes were applied to investigate the effect of abrasive particle size on abrasive wear resistance. The abrasion tests were made using the two-body abrasion test according to ČSN 01 5084 standard, abrasive cloths were of grits 80, 120, 240, and 400. Microstructure characterisation and surface analysis were made using optical and scanning electron microscopy. The results show the different influence of abrasive particles size on the wear rate for different structures of Fe-Cr-C system. The structures without primary carbides are of high abrasive wear rate, which increases nonlinearly with the increasing abrasive particle size. On the contrary, the structures containing primary carbides are of low abrasive rates and theses rates increase linearly with the increasing abrasive particle size.

Wear Resistance Mechanism of ZTAP/HCCI Composites with a Honeycomb Structure

“…Figure 5 shows the micro-hardness of the abrasives and the composite phases. The wear resistance of the composites has a direct relationship with the hardness, the load and the second phases [27]. It can be known that the hardness of ZTA particles is higher than that of the abrasives (Al2O3, SiO2, and Fe2O3) but lower than that of the SiC.…”

Corrosion Behaviour of High Chromium White Iron Hardfacing Alloys in Acidic and Neutral Solutions

“…The niobium element in alloy 2 helps to enrich the chromium in matrix which increases the austenite formation temperature and forms austenite matrix. The formation of reinforced NbC in alloy 2 helps prevent the detachment of chromium-rich M 7 C 3 primary carbides [35,39].…”

Review on hardfacing as method of improving the service life of critical components subjected to wear in service

“…According to Dolman [22], a hypereutectic hardfacing with 30 -60% volume of M7C3 carbides in a ferrous matrix (M = Cr, Fe, Mn) gave a nominal hardness of M7C3 carbides of 1200 -1500HV and 600 -700HV for the ferrous matrix. More so, Chotĕborský et al [43] revealed that the hardness of hypereutectic hardfacing increases with the increasing proportions of carbide phases MC and M7C3. Coronado et al [34], showed that hardfacing using flux cored arc welding gives better wear resistance than hardfacing by shielded metal arc welding.…”