FRICTION SURFACING METHOD OF COMPOSITE METAL TUBE AND COMPOSITE METAL TUBE FORMED BY FRICTION SURFACING

摘要

PROBLEM TO BE SOLVED: To provide a friction surfacing method of a composite metal tube by which a dilution ratio of a formed friction surfacing metal is minimized and deformation of a metal tube being a friction surfacing target is suppressed in a practically permitted range when friction surfacing is performed on the metal tube and to provide the composite metal tube formed by the friction surfacing.

SOLUTION: In the friction surfacing method of the composite metal tube, a supporting member 12 preventing depression of a metal tube 10 being a mother material and capable of being taken out is disposed in an inner part 11 of the metal tube 10, and a friction surfacing material 13 having corrosion resistance or wear resistance and different from the mother material is pushed to an outer surface of the metal tube 10 with high pressure while being rotated at high speed and moved on the outer surface of the metal tube 10 at constant speed to perform friction surfacing. The composite metal tube 14 formed by friction surfacing has≤2 mass% dilution ratio of the friction surfacing metal 20 formed by the friction surfacing material 13 with respect to the mother material.

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