Forming Prescored Tungsten Alloy Hemispheres.
VOUGHT CORP STERLING HEIGHTS MICH MICHIGAN DIV
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It was planned to further develop the manufacturing process by eliminating certain time consuming functions such as grit blasting and cleaning by a more rapid and economical means. Other economies were planned especially in the inspections of the part but were not implemented due to problems experienced in forming the hemispheres. Based on the experience of the program conducted during 1976, a 3-percent overage of discs was initially ordered 2472 discs. In order to complete the contract quantity, an additional 358 discs were purchased for processing, completing certifications and doing evaluation tests which brought the total purchased quantity to 2830 discs. The forming processes were carefully monitored to determine the most successful forming temperature and die strokes. It is felt that the successful forming of the tungsten hemispheres is directly dependent on material quality and uniformity. Varying amounts of porosity were found in the discs during this program which contributed to about 97 percent of the rejected hemispheres. A follow-on development program to improve the material quality and reduce the scrappage during forming has been proposed.
- Metallurgy and Metallography
- Fabrication Metallurgy
- Structural Engineering and Building Technology