Method of producing a flame-spray-coated article and flame spray

Details Method of producing a flame-spray-coated article and flame spray Method of producing a flame-spray-coated article and flame spray

1991-04-03

1992-03-24

Pianalto, Bernard

Coating processes

Roller applicator utilized

106 112, 106 127, 106403, 106453, 427190, 427191, 427201, 427217, B05D 108

Patent

active

050987488

ABSTRACT:
Powder which has primary particle size of not larger than 10 .mu.m and is formed of mixture of Ni powder and Cr powder added with hard particles containing carbide is mixed with Cr.sub.3 C.sub.2 powder and granulated and sintered, whereby flame spraying powder having secondary particle size of 5 to 53 .mu.m is formed. The flame spraying powder thus formed is flame-sprayed under conditions which will cause fused Ni.Cr to cover Cr.sub.3 C.sub.2 particles which are not fused, thereby binding the Cr.sub.3 C.sub.2 particles and causes the thickness of one Ni.Cr layer to be smaller than 5 .mu.m. In this manner, flame spray coating the porosity of which is not larger than 2% and the hardness of which is not lower than 700 (Hv: 200 g) can be obtained.

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