EVALUATION OF ELECTRODEPOSITED COPPER, LEAD, AND LEAD-TIN ALLOY (93-7%) BEARING SURFACES FOR SWAGING CANNON BORES.
WATERVLIET ARSENAL N Y BENET LABS
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Electrodeposits of copper, lead, and lead-tin were evaluated as bearing surfaces for swaging steel cylinder bores. Drive pressure-time curves for the traveling mandrel are reviewed and discussed. The relationship between bearing surface characteristics of swaged cylinders and the behavior of the traveling mandrel were established. Metallographic and x-ray back reflection Laue Method examinations are discussed and photographs are shown to exemplify bearing surface characteristics after swaging. Contrasting results are shown for the behavior of copper exemplifying stick-slip motion as compared to lead and lead-tin surfaces. Some results are also reported for tin and zinc electrodeposits. Average pressure-time curves from production runs are presented and compared with experimental lead and lead-tin tests. The evaluation has shown that lead is generally the best bearing material for the swaged tubes examined. Author
- Metallurgy and Metallography
- Fabrication Metallurgy