Friction and wear properties of thermo-reactive diffusion coatings against titanium nitride coated steels

In this work, the tribological behavior of hardened, tufftrited, titanium nitride coated, boronized, chromium carbide coated and vanadium carbide coated AISI 52100 steel balls against titanium nitride coated AISI 1020 steel disc have been studied under 0.5, 1 and 2 N loads. Titanium nitride, chromium carbide, vanadium carbide coating were performed by pack method. Tufftriting and boronizing treatment were performed by slurry salt bath techniques. The wear test was carried out ball-on-disc configuration system. Materials tested were hardened, tuftrided, boronized, and chromium carbide, vanadium carbide and titanium nitride coated AISI 52100 steel balls against titanium nitride coated AISI 1020 steel disc. These results showed that wear rate of hardened, tufftrided, titanium nitride and chromium carbide coated, boronized and vanadium carbide coated AISI 52100 steel balls coated by thermo-chemically steel were approximately linearly proportional to load. The contacting AISI 52100 steel ball showed even greater wear rate when tested on the titanium nitride coated AISI 1020 steel samples from thermo-chemically coated AISI 52100 steel samples. Vanadium carbide coated and chromium carbide coated steel balls have the highest wear resistance to titanium nitride coated samples, boronized, and tufftrided AISI 52100 steel balls have moderate wear rate and AISI 52100 steel ball have the lowest wear resistance to titanium nitride coated steel sample. The wear constant rate value of hardened, tufftrided, titanium nitride coated, chromium carbide coated, boronized and vanadium carbide coated steel balls against titanium nitride coated AISI 1020 steel disc are with in the range of 1.6367 × 10−6, 1.356 × 10−6, 4.744 × 10−7, 2.2543 × 10−7, 2.339 × 10−7 and 1.715 × 10−7 mm3/(N m), respectively.