THE EXTRUSION, FORGING, ROLLING, AND EVALUATION OF REFRACTORY ALLOYS
Technical Report
·
OSTI ID:4015630
Wrought bars of tungsten-base alloys were produced by extrusion of arc- cast bfllets under a variety of conditions. Billets of W + 0.6Cb alloy were successfully extruded using temperatures between 3200 and 4200 deg F and reduction ratios between 3.9: 1 and 8.3: 1. A comparison was drawn between W + 0.6Cb extrusions produced from material melted by four suppliers. Differences in material characteristics could be traced to electrode suppliers. The W + 6Mo + 2Cb alloy was extruded between 3400 and 4200 deg F using ratios from 4.1 : 1 to 7.4 : 1. Surfaces were generally fair to poor and internal cracks were discovered in many extrusions. Machining billets from 4-inch ingots instead of 31/2-inch ingots produced only a slight improvement in extrusion quality. Instrumentation of the extrusion press to measure ram load, die load, and ram position has enabled a realistic determination of container friction and a modification of basic extrusion theory. Jacketing tungsten-base billets with molybdenum was found more advantageous than applying glass as a lubricart, particularly at elevated temperatures. While swaging has been the most successful method for reduction of tungsten-base extrusions, higher tensile properties were obtained at 3000 deg F on forged material (46,200 vs. 63,300 psi for W + 0.6Cb). An ultimate strength of 48,200 psi was obtained on swaged W + 6Mo + 2Cb alloy. (auth)
- Research Organization:
- Westinghouse Electric Corp., Blairsville, Penna.
- NSA Number:
- NSA-18-020485
- OSTI ID:
- 4015630
- Report Number(s):
- ASD-TDR-62-67(Pt.II)
- Country of Publication:
- United States
- Language:
- English
Similar Records
TANTALUM EXTRUSION PROGRAM. Second Interim Technical Report, April 10, 1961-August 24, 1961
DEVELOPMENT OF HIGH STRENGTH COLUMBIUM AND TANTALUM ALLOY TUBING. Quarterly Progress Report No. 2, March 1, 1962-May 31, 1963
COLUMBIUM ALLOY EXTRUSION PROGRAM. PHASE V. TUBING PROGRAM. Interim Report VI. July 15, 1962-October 15, 1962
Technical Report
·
Tue Oct 30 23:00:00 EST 1962
·
OSTI ID:4798231
DEVELOPMENT OF HIGH STRENGTH COLUMBIUM AND TANTALUM ALLOY TUBING. Quarterly Progress Report No. 2, March 1, 1962-May 31, 1963
Technical Report
·
Fri Jul 12 00:00:00 EDT 1963
·
OSTI ID:4015248
COLUMBIUM ALLOY EXTRUSION PROGRAM. PHASE V. TUBING PROGRAM. Interim Report VI. July 15, 1962-October 15, 1962
Technical Report
·
Wed Oct 30 23:00:00 EST 1963
·
OSTI ID:4776642