The purpose of this study is to find of tribologic characteristics on the drag reduction in helical forging mold which is new development part in mobile auto-transmission. The test materials were SCr420H and SKD61. This study has used the pin-on-disk ...
The purpose of this study is to find of tribologic characteristics on the drag reduction in helical forging mold which is new development part in mobile auto-transmission. The test materials were SCr420H and SKD61. This study has used the pin-on-disk type of friction wear test system and has used the normal load in the range of 20-100N. It was operated at the speed range of 0.06-0.34m/s. The friction coefficient of helical gear and mold materials was a range of 0.02-0.12. When the velocity increases and the load decrease, the friction coefficient increased. On the other hand, the friction coefficient of dimple patterning materials was a range of 0.012-0.03. When the load increases, the friction coefficient decreased and the changes in velocity were not affected. The specimen of dimple processing was corresponding to 30% of the friction coefficient for not processing specimens. It is dimple effect.