Abstract
Critical conditions for seizure initiation in usual tribo-systems were discussed, and some effective measures to prevent seizure phenomena in metalworking processes were investigated. It has been confirmed that the critical temperature Tcr for seizure initiation of mineral base oils exist in the range of about 100-150 °C, and the critical oil film thickness ratio A represents the transition condition from a hydrodynamic lubrication regime to a boundary lubrication regime. The critical temperature Tcr for occurrence of heat streaks in cold rolling of steel sheet increases from 130 °C to 220 °C with increasing of the saponification number of the emulsion lubricant. The critical oil film thickness hcr for seizure initiation of mineral base oil was estimated by the forward extrusion type friction test and cold rolling. The critical curve for seizure initiation of some solid lubricants was obtained in the upsetting and twisting type friction test, and lubricity for some solid lubricants was examined in the ring compression friction test of stainless steel. MoS2 lubricant offered the best lubricity. The surface treatment for a titanium workpiece provided better lubricity against seizure. The treated dies displayed superior ability against seizure to a usual tool steel alloy. SiC ceramic die showed the best ability to prevent seizure among all ceramic dies.
| Original language | English (US) |
|---|---|
| Title of host publication | Tribology in Manufacturing Processes |
| Publisher | ASME |
| Pages | 125-131 |
| Number of pages | 7 |
| Volume | 30 |
| State | Published - Dec 1 1994 |
| Event | Proceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA Duration: Nov 6 1994 → Nov 11 1994 |
Other
| Other | Proceedings of the 1994 International Mechanical Engineering Congress and Exposition |
|---|---|
| City | Chicago, IL, USA |
| Period | 11/6/94 → 11/11/94 |
ASJC Scopus subject areas
- Engineering(all)