Patent ID: 6162500
Filing Date: 2000-12-19
Classification: C23C

Abstract:
A method of treating a casting including a machined internal cylindrical casting surface of an internal combustion engine, said casting surface having a core roughness of approximately 0.5 micrometers to approximately 3.0 micrometers, a reduced peak height of approximately 1.0 micrometers to approximately 2.0 micrometers, and a reduced groove depth of approximately 0.5 micrometers to approximately 5.0 micrometers, comprising the step of vapor-depositing at a temperature less than approximately 250 degrees Centigrade a wear-resistant coating on said casting surface using a vapor depositing means so that said coating has a core roughness of approximately 0.5 micrometers to approximately 2.8 micrometers, a reduced peak height of approximately 0.1 micrometers to approximately 1.8 micrometers, and a reduced groove depth of approximately 0.5 micrometers to approximately 4.8 micrometers, said vapor depositing means including an electrode in the shape of a bar or rod.