Research on Tribological Performance of QT600 with Laser Surface Texturing

Tribological test of ductile iron ring with laser surface texturing in its thrust end is presented. To study QT600 wear performance at early work stage, experimental results of several laser textured morphologies (such as smooth, dot and diamond shapes) are listed and compared. It is found that the distribution rate of 10% in the series of same style has the best anti-wear characteristics. Among those grid surfaces textured by different laser processing parameters, the specimen of laser current 10A, textured line pitch 150um (150um10A) behaves the best wear resistance and that of 100um9A behaves the lowest friction coefficient. In addition to contrast performances of general smooth, dot and grid shape texture, though the general smooth surface friction coefficient is small at first but it has a large amount of wear, and its roughness increases with the friction time. Experiments show laser texturing under suitable parameters could enhance wear performance of materials.