| 摘要 |
<p>Thermal spraying lining process for piston rings, including the initial step of anchoring a plurality of piston heads (1) on a basic structure (2), against mutual relative displacements, so that their external contact faces (1a) define a cylindrical surface, and further including the step of spraying, progressively and continuously, by a forced gaseous stream and onto the cylindrical surface of the basic structure (2), a mass of droplets which are melted by an oxy-acetylene torch, from at least one molybdenum feeding wire (4), and from at least one feeding wire (4) of a softer metallurgical bonding material which may be steel, the mass of droplets consisting of about 30 to 60% of molybdenum, the remaining being bonding material. The cylindrical surface may be subjected, during spraying, to a rotational motion around its geometrical axis, simultaneously with a translational motion towards said geometrical axis, in order to produce helical paths to the mass of sprayed droplets. <IMAGE></p> |
