自溶性ニッケル合金粉とセラミックボールによる鋳鉄の表面複合化

抄録

  Coating with Ni based self-fluxing alloy powder and ceramics balls for iron casting was developed. The fusing and solidification progress of the Ni alloy powder was investigated by the permeability test and also, analyzed by the finite element method. The results showed that the fused Ni alloy hardly permeated into ceramics filter even though a 7kPa head of molten metals was applied, and that the chemical composion of the Ni alloy at the outer layer remained the same. A reason for this may be that a solidificatio shell of cast iron forms in an early stage near the interface of Ni alloy and cast iron, while Ni alloy continues to fuse moving to the surface, and in this case the lquid phase of the Ni alloy changes during isothermal solidification.