1128 溶射部材の疲労特性に及ぼす再溶融処理時間の影響  [in Japanese] Effect of Fusing time on Fatigue Properties of Thermally Sprayed Steel  [in Japanese]

Rotational bending fatigue tests were performed on a medium carbon steel(S35C) coated with thermally sprayed Ni-based self-fluxing alloy, under the condition of a fixed fusing temperature of 1010℃ to clarify the relationship between fatigue properties and fusing time. Fusing time varied from 200 seconds to 10 hours. As a result of these fatigue tests, the specimen fused 200 seconds showed the lowest fatigue strength, because every specimen of this series showed delamination between substrate and coating layer. In the specimens without delamination under cyclic loading, a gradual reduction in fatigue strength was observed with the increase of fusing time. There exists an adequate fusing time which brings the highest fatigue strength between 200 seconds and 30 minutes in the fusing process.