Investigate Wear Resistance of TiAl2O3 Coating by Detonation Gun Process On AISI 8620

ABSTRACT: Lubricated sliding components such as gears and cams sometimes fail catastrophically and without any warning, due to Sliding wear. This sudden mode of failure is often called scuffing. Carbon steel such as AISI 8620 which has been principally used in the gears & cams. Thus after a certain time periods these are needed to be replaced. It results in wastage of time, money and material. To minimize this problem, Detonation Gun technique is utilized to develop wear resistant coatings for AISI 8620. It has been found out that TiAl2O3 coatings can be very useful to minimize the wear problem of AISI 8620. Therefore Detonation Gun Sprayed coatings has been recommended as a better choice to reduce the wear of AISI 8620.Therefore TiAl2O3 coatings are useful in order to enhance the wear resistance of the base metal steel. The coating powder namely TiAl2O3 was coated on the substrate AISI 8620 steel specimen. This coating was characterized by the SEM analysis. Subsequently the wear behaviour of the uncoated and coated AISI 8620 steel was investigated. Cumulative wear rate and Cumulative wear volume were calculated for the coated, as well as, the uncoated specimens for 10 N, 20 N and 40 N normal loads. The worn out surfaces were examined by SEM analysis. There are no signs of deformation of splats for the coated AISI 8620 steel case whereas very marginal deformation is indicated in the case of uncoated AISI 8620 steel. This shows that the coated samples have been significantly higher wear resistance in comparison to their uncoated counterparts..It has been concluded that TiAl2O3 coating has been recommended as a better choice to reduce the wear of AISI 8620 steel. I