MACHINING OF REFRACTORY MATERIALS
Abstract
Machining studies were performed on Rene 41 solution treated to 321 BHN, Rene 41 aged to 365 BHN and D6AC steel quenched and tempered to 56 and 58 Rockwell-C(Rc). In drilling the Rene 41 alloy in both the solution treated and the aged conditions 50 to 60 holes could be drilled with a 1/4-in.-diam high speed steel drill at a cutting speed of 15 fpm, a feed of .002 in./revolution, with a highly chlorinated oil as a cutting fluid. A carbide evaluation in turning D6AC steel at 56 Rc shows that the best tool life obtained was with a C-8 type of carbide. Tool life for this carbide was over 50 min at a cutting speed of 95 fpm, a feed of .005 in./min and a depth of cut of .062 inches. The effect of cutting speed and feed on drill life in drilling D6AC with carbide tipped drills at 56 and 58 Rc was investigated. A drill life of 50 holes was obtained on the D6AC steel at 56 Rc at a cutting speed of 115 fpm and a feed of .001 in./revolution. At the higher hardness of 58 Rc, a drill life of 30 holes was obtained at a cutting speed of 85 fpm and a feed of .0005 in./revolution. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0256035
Entities
People
- L.j. Nowikowski
- Mark Field
- N. Zlatin