中国焊接
中國銲接
중국한접
CHINA WELDING
2014年
4期
44-50
,共7页
particle density%WC-17Co%deposition%flattening%HVOF
The in-flight and deposition properties ofthree types ofWC-1 7 Co powder with different particle densities during a high-velocity oxygen fuel (HVOF)thermal spray process were investigated.Three types ofpowder exhibited similar velocity upon impact on the substrate surface.The powder with the lower particle density exhibited a higher temperature upon impingement process,resulting in the generation ofa higher flattening ratio.Thus,the coating derived from the powder with the lower particle density possessed superior micro-hardness,porosity and surface roughness.However,the coating with the lowest particle density showed the poorest fracture toughness because ofthe generation ofthe largest amount ofamorphous phase.
