Wear Resistance of 08Kh14N5M2DL Steel Grade Having Deposited Kh25N10V8 Alloy Layer at Elevated Temperatures

Abstract

The results are given for impact of defects in the deposited layer on the durability of melted samples made of 08Kh14N5M2DL steel grade operating under conditions of friction at heating temperatures up to 800–900°C and under significant loads in the tribological contact zone. Defects in the deposited layer are represented by pores, the lack of fusion, and fractures. The defects inside samples undergoing friction tests are determined using X-ray computer tomography. It is found that the wear resistance of the surfacing layer without defects decreases both with growing test temperature and with increasing load applied to tribological contact. The presence of a microfracture pattern inside the deposited layer is crucial to dramatically decrease wear resistance. The presence of porosity in the deposited layer affects the wear to a lesser extent.