Laser cladding valve sheet forming method and laser cladding valve sheet forming apparatus

摘要

PPROBLEM TO BE SOLVED: To form a laser clad valve seat free from cracks or the like by performing metallic powder supply and laser irradiation with proper timing. PSOLUTION: In the method of forming a laser clad valve seat, metallic powder 4 is supplied to the valve seat forming part 2 of a cast cylinder head 1, with laser hv emitted thereto, and then the cylinder head 1 is rotated, with the metallic powder 4 melted by the laser hv for padding. Before the irradiation of the laser hv, preliminary supply is performed to supply the metallic powder 4. Thereafter, concurrently with the start of the laser hv irradiation, the supply quantity of the metallic powder 4 is increased. PCOPYRIGHT: (C)2010,JPO&INPIT