THE DEVELOPMENT OF FABRICATING TECHNIQUES FOR PRODUCING HIGH PURITY RHENIUM STRIP 6 X 6' X 0.005 INCHES
Abstract
A total of 7-1/2 lb of high purity Re powder, lot 210, was produced; chemical analysis, screen analysis, and physical measurements are tabulated. Abb of powder were mechanically compacted at 25 ton/sq in. The compacts were vacuum presintered at less than one micron pressure for 3 hr at 1200 C and then sintered by self resistance heating in H at 2700 to 2800 C. The fully sintered compac s were then heliarc welded to orm an electrode for electron beam melting into a 1.5-in.-diam ingot. The cast ingot had an average hardness of 317 VHN. The ingot was machined by grinding to remove surface cold shuts and then cut into 3 ecut 5 lb of powder were mechanically compacted at 25 ton/sq in. The compacts were vacuum presintered at less than one micron pressure for 3 hr at 1200 C and then sintered by self resistance heating in H at 2700 to 2800 C. The fully sintered compac s were then heliarc welded to orm an electrode for electron beam melting into a 1.5-in.-diam ingot. The cast ingot had an average hardness of 317 VHN. The ingot was machined by grinding to remove surface cold shuts and then cut into 3 ections. Sample 1 was induction heated to 1600 to 1700 C and then forged flat in one heat to 1/2in. thickness, on a 2500lb steam hammer. The sample cracked so severely that further fabrication was not attempted. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 1960
- Accession Number
- AD0260973
Entities
People
- A.h. Springmeyer
- J.h. Port