Abstract: A method of removing the burrs at the junction of a drilled hole with a passageway previously formed in a metal part by means of a high power laser beam is disclosed. Novel steps in the control of the laser beam to avoid damage to the walls of the passageway or intersecting drilled hole are described.

Abstract: An aluminum piston for use in heavy duty internal combustion engines is disclosed, in which the grooves for receiving the piston rings are formed in stainless steel inserts fusion bonded directly to the aluminum without an intermediate metallic layer other than the resulting alloy of the steel and aluminum. The method of making such piston is described in which austenitic stainless steel powder deposited in an oversize groove in the aluminum piston is melted in situ by a laser beam to simultaneously form the stainless steel insert and alloy it with the aluminum to provide a fusion bond, the piston ring groove being subsequently formed in the stainless steel insert.

Abstract: A method of and means for cutting hose of the type designed for use in high pressure hydraulic systems is disclosed in which the impingement of a high power laser beam is moved about the periphery of the hose in a plurality of passes. An embodiment is described in which the hose remains stationary with the beam being moved thereabout and a further embodiment is disclosed in which the beam remains stationary and the hose is rotated about its own axis. The provision of inert gas to prevent combustion both inside and outside the hose during cutting thereof is disclosed.

Abstract: A powdered metal article having a fused wear resistant coating thereon is described. Specific embodiments of such article are disclosed including a specific powdered metal and a specific coating together with specific structural relationships therebetween. A method of making articles according to the teaching of this invention is described.