Metal Silicide on the Steel Substrate Formed by Atmospheric Controlled IH-FPP (AIH-FPP) and Its Effect on Corrosion Resistance Improvement

Abstract

Metal silicides are potential materials because of their excellent properties such as corrosion resistance, oxidation resistance and wear resistance. In this study, the authors propose a new surface treatment process to form metal silicides on metallic materials by using an atmospheric controlled IH FPP. Atmospheric controlled IH FPP in which Si particles are bombarded to the substrate with an elevated temperature of 1173 K can form the iron silicide. Elevated temperature of the substrate enhances transfer of Si particles on the substrate, followed by mixing and/or diffusion into the substrate. This results in the formation of iron silicides. Atmospheric controlled IH FPP with Si Cr mixed particles also forms the iron silicide. Atmospheric controlled IH FPP with the mixed particles followed by annealing of 873 K for 3600 s forms chromium silicide in accordance with Fe Cr Si ternary phase diagram. Carbon steel materials covered with the silicide layer exhibit better corrosion resistance since SiO 2 is formed on the silicide.

Formation of a TiAl₃ Layer by an AIH-FPP Treatment Using Mechanically Milled Particles and Its Wear Resistance

“…Ti-Al 金属間化合物は，軽量で耐食性や耐摩耗性に加えて 耐熱性にも優れるため，高温構造材料としての利用が期待さ れている．実際，自動車のターボチャージャーなどの素材と して最近利用され始めている．しかし，靱性や延性に乏しく 脆いという欠点を有しているため，バルク材を部品形状に機 械加工して利用することは困難である．そこでこの金属間化 合物を，靱性の高い基材へコーティングすることで，その優 れた特性を最大限に活かす試み 1,2) が検討されている． 本研究では，この金属間化合物を鋼の表面に被覆する手法 として，著者らが開発した AIH-FPP (Atmospheric controlled Induction Heating Fine Particle Peening) 処理 [3][4][5][6][7][8][9][10][11][12][13][14] に着目した．…”

Surface Properties of Intermetallic Compound Layer Formed on Titanium Alloy by AIH-FPP (Atmospheric Controlled Induction Heating Fine Particle Peening) Treatment

“…14) On the other hand, the authors have demonstrated atmospheric controlled induction heating fine particle peening (AIH-FPP) 5) treatment as an alternative technique for the same purpose. 6,7) Our work has recently shown that intermetallic compound layers can be produced on the surface of carbon steel by AIH-FPP treatment via a combustion synthesis reaction 8,9) that occurs on the surface of the treated material. 10,11) We have also proposed that mechanically-milled shot particles containing different elements could be used to create homogeneous intermetallic compound layers.…”

Effect of Fine-Grained Microstructure Induced by Induction-Heating Fine Particle Peening Treatment on Fatigue Properties of Structural Steel (0.45%C)

“…A treated specimen surface can be simultaneously modified by plastic deformation and quenching. Recently, there have been reports concerning the creation of a modified layer by using this treatment system [2][3][4]. IH-FPP treatment of SCM435 steel is highly effective in improving the fatigue strength of steel [5].…”