High Temperature Friction and Wear and Oxidation Properties of Fe-Al/TiC Laser Cladding Layer

The friction and wear characters of Fe-Al/TiC laser cladding layers coupled with Si3N4 from room temperature (25 ℃) to 700 ℃ was investigated by high temperature friction and wear test. The mechanism of high temperature friction and wear was discussed and oxidation test was done at 700 ℃. The results show that the friction coefficient of the Fe-Al/TiC cladding layers decreased with the increasing of temperature for oxide protective layers with solid lubrication formed on cladding layers wear surface, and the wear rate always remained in lower level and was one sixth of that of 35CrMo steel at 700 ℃. The cladding layers had good high temperature oxidation resistant property, the wear quality added to 1.5 mg·cm-2 at 700 ℃ for 1.5 h and the oxidation property resistance increased more than 40 times compared with the 35CrMo steel. The main mechanism of cladding layers high temperature wear was delamination wear.