THE PRIMARY WORKING OF REFRACTORY METALS.
Abstract
Three inch diameter billets of sintered W+2%ThO2 and cast tungsten, molybdenum and columbium alloys were heated to temperature ranges of 2400F to 4000F and extruded by a 700 ton instrumented press through 60, 90 and 120 degree dies into 1 . 15 in to 1 . 75 in diameter bars. The extrusion techniques were evaluated by correlating deformation loads and extrusion properties with processing variables. Die load data were evaluated by the relation, die load divided by cross-sectional area of the upset billet equals an extrusion factor multiplied by the natural logarithm of the reduction ratio. Surface soundness of extruded bars are a function of processing variables and billet material characteristics. Apparent coefficients of friction in the liner were calculated, ranged from .015 to .205 and tended to increase with extrusion temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1964
- Accession Number
- AD0612487
Entities
People
- Daniel R. Carnahan
- Vincent Depierre
Organizations
- Westinghouse Electric Corporation