FRICTION WELDED BODY OF CERAMICS-METAL AND CERAMICS-INSERTED PISTON MADE THEREOF

摘要

PURPOSE:To heighten the bonding power and aim at lowering the cost by providing a cutout part at the peripheral part of the face to be bonded of a ceramics- made member and bonding a metal made member to this cutout part by friction welding. CONSTITUTION:A piston for an internal combustion engine is integrally bonded by inserting a ceramics-made member 1 and a metal-made member 3. A cutout part 2 is provided at the peripheral part of the face of the ceramics-made member 1 facing the metal-made member 3. The metal-made annular member 3 is bonded to this cutout part 2 by friction welding. The metal made annular member 3 softened by frictional heat plastically flows into a gap A and restrains the projecting part 4 of the ceramics-made member 1 by the action of shrinkage fit and press fitting. The bonding power is thus heightened and the decrease in the cost is promoted.