Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지

Basic Research for Development of Hypereutectic Al-Si Alloyed Cylinder Block Bore by Plasma Spraying System for Internal Diameters

내경 플라즈마 용사법에 의한 과공정 Al-Si 합금의 실린더 블록 보어 개발을 위한 기초연구

  • 김병희 (충남대학교 재료공학과) ;
  • 이형근 (한밭대학교 생산가공공학과) ;
  • 김혜성 (밀양대학교 재료공학과)
  • Published : 2001.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this study is to investigate the characteristics - microstructure, hardness, adhesive strength and friction coefficient - of the coatings with aging - treatment after optimizing internal- plasma spraying parameters for Al-30wt%Si powder as a basic research to manufacture the cylinder block bore for Al engine composed of Al-30wt%Si alloy on Al alloy, The optimum internal-plasma spraying parameters of Al-30wt%Si alloy are summarized as follows: voltage: 37.5V, current: 160A, working distance: 25mm, gun traverse speed: 4.5mm/s, rotating speed: 518m/min. The primary Si particles grew aggressively with increasing heat-treating temperature. The hardness of the as-sprayed coating was about Hv=275 but this value was abruptly decreased with increasing heat-treating temperature. And average friction coefficient of the coating was below 0.08 after heat treatment for 48h at $175^{\circ}C$.

Keywords

References

  1. G. Wuest, G. Barbezat and S. Keller, SAE Technical Paper Series 970016, pp.33 (1997)
  2. V.D.N. Rao, D.M. Kabat, R. Rose and D.Y. Leong, Automotive Eng., pp. 57 (1997)
  3. V.D.N. Rao, D.M. Kabat and G. Wuest, SAE Technical Paper Series 970023 (1997)
  4. R.C. McCune, Welding. J. pp. 41 (1995)
  5. G. Barbezat and G. Wuest, Surf, Eng., 13 (2) pp113 (1998)
  6. 이형근, 김병희, Report 99-I-01-03-A-068, 과학기술부 (2001)
  7. ASTM C 633-79, ASTM (1980)