TiCN particle reinforce composite coating in-situ synthesized by nitrogen arc cladding technique

An in-situ synthesized TiCN particle reinforce composite coating was fabricated on Q235 steel substrate by nitrogen arc cladding technique, wherein the titanium powder and the graphite powder as original material were intensively mixed by ball-miU and glued with starch binder, then preplaced onto the Q235 steel substrate. The microstructures and interfacial behavior were investigated by scanning electron microscopy. The phase of the coatings was investigated by X-ray diffractometer. The microhardness was tested by microhardness tester. The anti-abrasive pe~Cormance was tested by abrasion machine. The results show that an excellent bonding between the coatings and carbon steel substrate is ensured by the strong metallurgical inteoCace and phases of the coatings are mainly composed of TiCN. The highest microhardness of the coatings reaches 810HV0. 5, which is about 3 times more than that of the Q235 substrate. The anti-abrasive test results indicate that the coating is more anti-abrasive than the Q235 substrate.