Ni-기 자융성합금의 코팅에 관한 기초적 연구(I) - 용사입자의 편평거동이 코팅층의 기계적 특성에 미치는 영향 -

Fundamental Study on Ni-Base Self-Fluxing Alloy Coating by Thermal Spraying(I) - Effect of Splat Behavior of Sprayed Particles on Mechanical Properties of Coating Layer -

Ni-base self-fluxing alloy powder particles were flame sprayed onto the SS400 mild steel substrate surface. The effects of both substrate temperature and spraying distance on the splat behavior of sprayed particles were examined. The results obtained are summarized as follows: 1) In the splat behavior of Ni-base self-fulxing alloy particles sprayed onto the SS400 mild steel substrate, splashing was observed under the room temperature condition. On the contrary, it showed circular plate pattern in the substrate temperature range over 373K. 2) It was cleared that there was close relationship between mechanical properties of coating layer and splat behavior of sprayed particles. 3) From the experimental results, optimum spraying conditions showed excellent mechanical properties in the case of Ni-base self fluxing alloy sprayed onto the SS400 mild substrate were 473K of substrate temperature and 250mm of spraying distance.