Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Optimization of HVOF Spray Parameters for $Cr_3C_2 - 7wt%NiCr$ Coating Powder by Experimental Design Method

실험계획법에 의한 $Cr_3C_2 - 7wt%NiCr$ 용사분말의 HVOF 용사변수 최적화

  • Published : 1997.02.01
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Abstract

This study was conducted by L9 orthogonal array to obtain optimum spray parameters for This study was conducted by L9 orthogonal array to obtain optimum spray parameters for $Cr_3C_2 - 7wt%$(80wt%Ni-20wt%Cr) coating powder. The factors were hydrogen flow rate, oxygen flow rate, gun-to-work distance, powder feed rate. And evaluation methods for the coating were surface roughness, oxygen concentration, micro-hardness, pore size and distribution, low angle ($30^{\circ}$) erosion rate, and microstructure of coating. The optimum HVOF spray conditions were proved as follows : hydroen flow rate ; 681 SLPM, oxygen flow rate ; 215 SLPM $H^2/O^2 ratio= 3.16), gun-to-work distance ; 22cm, powder feed rate; 25g/min. The hardness (Hv300) was 1147 and the erosion rate ($30^{\circ}$degree) was $3.16\times10^{-4}$g/g. It is believed that the optimized spray conditions can be improved the wear-resistance and anti-erosion characteristics of the coating.

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References

  1. Advansed Material & Processes v.7 HVOF Moves into the Industrial Mainstream D. W. Parker;G. L. Kutner.
  2. Surf. Coat. Technol. v.41 R. Elsing;O. Knotek;U. Bltin
  3. ASM Thermal Spray Conference Pittsburg J. Nerz;R. Kaufold;B. Kushner;A. Rotolico.
  4. Quality engineering using robust design M. S. Phadke
  5. 응용실험계획법 박성현
  6. 현대실험계획법 박성현
  7. Wear v.35 A. W. Ruff;L. K. IVES
  8. Metco 2600 Hybrid performance HVOF Turbine Engine Premium Coatings Guide Metco
  9. 日本溶射協會誌 v.26 no.3 ジルユニア 溶射被膜の機械的性質に及ぼす溶射條件の 影響 晴水保雄
  10. Ph. D. Disseration, State University of New York A microstructure investigation of plasma-sprayed metal and oxide coating S. Safai
  11. Surf. and Coat. Technol. v.39;40 A review of microstructure and properties of plasma sprayed ceramic coatings R. McPherson
  12. Diamalloy 3005 Metco Technical Bulletin
  13. Wear 193 The role of properites in the erosion of brittle material P. H. Shipway;I. M. Hutchings
  14. Wear v.174 The erosion -oxidation behavior of HVOF Cr₃C₂-NiCr cermat coating Bu Quan Wang;Kevin Luer
  15. 日本溶射協會弟59回全國大會講演論文集 Wear Behavior of HVOF Sprayed Cr₃C₂-20%NiCr Coating Yasuo Shimizu