Effective Fusing Method to Achieve Thermally Sprayed Steel with Ni-Based Self-Fluxing Alloy which Indicate High Fatigue Properties(<Special Issue>Thermal Barrier Coating Systems for Gas Turbines)

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  • 高疲労特性を有する自溶合金溶射部材作製のための有効な再溶融処理方法の提案(<小特集>ガスタービン用遮熱/耐環境コーティング技術)
  • 高疲労特性を有する自溶合金溶射部材作製のための有効な再溶融処理方法の提案
  • コウヒロウ トクセイ オ ユウスル ジヨウ ゴウキン ヨウシャ ブザイ サクセイ ノ タメ ノ ユウコウ ナ サイヨウユウ ショリ ホウホウ ノ テイアン

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Abstract

In order to achieve thermally sprayed steel which Indicate higher fatigue properties, effective fusing methods were performed by using both an induction heating system and a vacuum furnace. In our previous studies, fusing by an induction heating system can form the sprayed coating which was prevented segregation of chromium compound, and fusing by a vacuum furnace can form the thicker diffusion layer which indicates higher adhesive strength. Method of performing pre-heating by a vacuum furnace before fusing by an induction heating system couldn't achieve thermally sprayed steel which indicate higher fatigue properties because delamination between the coating layer and substrate was occurred. However, method of performing re-heating by a vacuum furnace after fusing by an induction heating system could. As the result, thermally sprayed steel indicate 300% higher fatigue strength compare with substrate only.

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