| 摘要 |
PURPOSE:To improve the wear resistance in high temp. zones by covering a required part of the body surface with a composite material layer consisting of metallic matrix and ceramic particles dispersing and mixing in the matrix. CONSTITUTION:Particles having sizes of 0.01-4mum of WC, Cr2C2, ZiC, TiC, Si3N4, ZrO3 and Al2O3 are mixed by a ratio of 20% or more as a ceramic dispersion layer. Iron base heat resistant alloys and Co base or Ni base alloys are used as a matrix metal. A composite metallic layer 3 consisting of the above two materials is formed onto a groove 2 of a roll 1 required a wear resistance by buildup welding method. Such a structural roll has a superior wear resistance and the service life is improved. |
