HIGH ENERGY RATE EXTRUSION PROGRAM.
Abstract
Thin Tee sections of TZM, molybdenum-base alloy, and B-66, columbium-base alloy, were extruded by the high-velocity extrusion process. Nominal dimensions of the Tee section were 2 inches by 1 inch by .050 - .070 inches. Surface finish was generally better than 100 RMS and radii were good. Maximum lengths which were obtained were 7 feet of the TZM alloy and 4 feet of the B-66 alloy. These lengths were near the maximum obtainable because of the stiffness of the alloys and the power limitations of the machine. The effect of temperature and reduction ratio on the extrusion pressure was investigated and a process was outlined for extruding these two metals on highvelocity extrusion equipment. The B-66 alloy has a tendency to become hot short at temperature over 3200 F and was, therefore, limited to lower extrusion temperature and shorter lengths. The TZM alloy extruded at 3700 F - 3900 F satisfactorily and the lower temperatures produced the best surfaces. Ceramic coated ZrO2 dies were used and did not show any wear when extruding B-66 alloy. They did appear to open up or wear slightly when extruding TZM. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1963
- Accession Number
- AD0422115
Entities
People
- J. M. Rippel
Organizations
- Westinghouse Electric Corporation