Methods of forming superficial diffusion alloys

Details Methods of forming superficial diffusion alloys Methods of forming superficial diffusion alloys

C - Chemistry, Metallurgy

23

C

117/74.5

C23C 10/58 (2006.01)

Patent

CA 1072405

ABSTRACT OF DISCLOSURE A metal article has formed thereon a surface diffusion alloy by applying a refractory filter element to the workpiece surface, the filter element being a refractory felt based on metal fibres including chromium in a proportion by weight of from 10 to 60%. The felt is oxidised to give a layer of chromium oxide. This is followed by conventional thermochemical powder diffusion treatment in the presence of at least one chromium oxide-reducing element selected from aluminium, yttrium, titanium and the lanthanides,

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