METHOD FOR PREPARING A SURFACE BEFORE THERMAL SPRAY-COATING

摘要

The invention relates to a method for preparing the surface of a substrate (100) for the purpose of accepting and holding a coating sprayed by a plasma torch. Said method includes a machining phase and is characterized that it includes the following phases: producing, by means of a machining tool (200), at least one groove having at least one angled edge; offsetting the tool (200) by moving the tool relative to the surface of the substrate (100) in a direction perpendicular to the longitudinal axis of the groove and along a path shorter than the projected length of the angled edge; and using said tool (200) on the angled edge of the groove such as to subject said edge to stress and create another offset groove, and so on and so forth, such that the tool (200) irreversibly changes the shape of the ribs (111, 112, 113, 114) finally obtained between each groove, and said ribs adopt undercut surfaces.

主权项

1. Method for preparing the surface of a substrate (100) for the purpose of accepting and holding a coating sprayed by a plasma torch, said method being of the type of the one comprising a machining phase, CHARACTERIZED IN THAT it comprises the following phases:
producing, by means of a machine tool (200) at least one groove with at least one angled edge, offsetting the tool (200), by moving the tool relative to the surface of the substrate (100), according to a direction perpendicular to the longitudinal axis of the groove and along a path shorter than the projected length of the angled edge, using said tool (200) on the angled edge of the groove in such a way as to subject this edge to stress and create another offset groove and so on and so forth such that the ribs (111, 112, 113, 114) finally obtained between each groove are irreversibly deformed under the action of the tool (200) and adopt undercut surfaces.