Thermal spraying preprocessing method and a cylinder block of an engine so preprocessed

摘要

The adhesiveness of a thermal spray coating and a cylinder internal surface is improved by forming a sufficient roughened surface on an internal surface. A processing roller is installed on the main shaft of a processing device via a pressurizing mechanism. An uneven surface is provided on the external periphery of the processing roller. By pressing the processing roller against the internal surface while the roller rotates and moves, a fine unevenness that corresponds to the unevenness of the roller is formed on the cylinder internal surface. A thermal spray coating is formed on the internal surface where the inner surface has been roughened by forming the above-mentioned unevenness.

主权项

1. A method of processing a workpiece surface of a workpiece, comprising:
applying a nickel material to an uneven outer surface of a processing roller, and thereafter, bringing the uneven outer surface into contact with a workpiece surface comprising at least one inner surface of an aluminum alloy cylinder block of an engine; pressing the processing roller against the workpiece surface; and rotating the processing roller relative to the workpiece surface, while pressing against the workpiece surface, thereby roughening the workpiece surface, detaching at least some of the nickel material from the uneven outer surface and attaching at least a portion of the detached nickel material to the workpiece surface and at the same time.