HIGH TEMPERATURE EXTRUSION LUBRICANTS.
Abstract
Superior metalworking lubricants have been developed and have proven capability for broad temperature range utilization during extrusion of difficult round and tee sections of aerospace alloys. Numerous experimental lubricant materials were initially evaluated by three laboratory screening tests. First, a 'lubricity' test was devised to measure the lubricating characteristics under conditions simulating those found in extrusion. Second, a 'reactivity' test determined the relative degree of surface reaction between billet materials and candidate lubricants. Third, an 'insulation' test measured comparative thermal insulation characteristics for all candidate lubricants which exhibited superior results in the lubricity test. More than 100 extrusion trials each were conducted with 4340 steel and molybdenum -0.5% titanium billets. Results from the extrusion trails have demonstrated that a mixture of magnesium metaborate and graphite in water promotes relatively low extrusion pressures and superior control of extrusion dimensions and surface finish. These results have further demonstrated that this new lubricant is equally applicable to extrusion of 4340 steel at 1800F and molybdenum -0.5% titanium alloy at 3500F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1964
- Accession Number
- AD0606243
Entities
People
- Robert C. Haverstraw