Authors: A Röttger S L Weber W Theisen B Rajasekaran R Vaßen
Publish Date: 2012/01/31
Volume: 21, Issue: 2, Pages: 344-354
Abstract
Thick 23 mm Febase coatings with admixed ferrotitanium Fe30Ti70 were applied to austenitic steel by a highvelocity oxyfuel process HVOF Hotisostatic pressing HIP was carried out to the decrease porosity and to increase the material strength wear resistance and adhesive bond strength of the deposited coating to the substrate material SEM and XRD investigations confirmed the formation of hard titanium carbide TiC particles during HIP treatment as a result of strong carbon diffusion out of the metal matrix and into the Fe30Ti70 particles The mechanical and wear properties of the densified coatings were investigated by means of shear tests hardness measurements and abrasive wear tests A comparison of the coatings in the assprayed and the HIPed state showed a large increase in the wear resistance due to in situ TiC formation
Keywords: