PROCESS AND APPARATUS FOR FORMING HARD, ABRASION-RESISTANT LAYER ON SLENDER, BODY OF ROTATION SHAPED RODS LIKE HUDRAILIC PISTON RODS, PLUNGERS ETC. IN PROCESS OF MANUFACTURING HEW RODS OR REPAIRING OUTWORN ONES

摘要

According to the proposed method the metallic component is heated up and the surface coating is melted on it. High frequency induction pre-heating is proposed followed by spraying-on the intended metal coating material which is then melted, also by high frequency heating. The pre-heating, spraying, and melting processes are started in a sequence and maintained continuously along the cylindrical component in a downward direction. - Equipment is proposed, comprising elements for holding and heating the component and spraying-on the coating material, as follows: the component is surrounded by high-frequency induction type pre-heater and an induction type heater for melting the surface coating. A spray gun (11) is located between the heaters. The heaters and the spray gun are arranged so that their distance from the component being treated can be adjusted. - The heaters and the spray gun can also be moved along the component or the component can be arranged to move with respect to the heaters and the spray gunen