| 摘要 |
PURPOSE:To prevent dissipation of Cr after flame-spraying and to hold non-rust properties by forming a sleeve by using a stainless steel and covering a flame- sprayed film with a specified flame-spraying material. CONSTITUTION:A flame-spraying material formed of a stainless steel containing 20 wt% or more Cr is arc-sprayed on the surface of a hollow pipe and covering with a flame-sprayed film 11 is effected to produce a sleeve. In which case, even when Cr is locally dissipated in the flame-sprayed film 11 by means of heat generated during flame-spraying, Cr is prevented from dissipation on the whole, and a fair amount of Cr can remain. This constitution keeps the flame- sprayed film 11 at a sound state, prevents the occurrence of rust, and ensures non-rusting properties intrinsic to stainless steel. |
