| 摘要 |
PURPOSE:To prevent deformation and to obtain a flame spraying film having good close adhesiveness, by roughening the surface of a thin metal plate being an object to be subjected to flame spraying so as to obtain specific roughness and applying flame spraying treatment to the roughened surface while cooling said plate from the back surface thereof by the cooling backing material contacted with said back surface. CONSTITUTION:For example, when a regular steel plate with a thickness of 1mm or less is used as a thin metal plate 3, the surface of said steel plate is treated from a distance of 100-150mm under blast pressure of 3kg/cm<2> by using a #220 polishing material to obtain a roughened surface with surface roughness RZ of 10mum or less. A backing material 4 comprising a heat dissipating material and structure is contacted with the back surface of the surface roughened steel plate and a flame spraying material 2 is sprayed to the roughened surface from a flame spraying gun 1, while cooling air 5 is impinged to said backing material to promote heat dissipation, to form a flame spraying film. At the time of flame spraying, it is pref. that the supply amount of the flame spraying material per one time is reduced and repeating flame spraying is performed several times to form the flame sprayed film 6. |
