Download Free Development Of Optimum Methods For The Primary Working Of Refractory Metals Book in PDF and EPUB Free Download. You can read online Development Of Optimum Methods For The Primary Working Of Refractory Metals and write the review.

Extrusion techniques and processes developed at the experimental extrusion facility were used to provide wrought materials for other contractors AND GOVERNMENT AGENCIES. These techniques and processes helped to expedite alloy development programs in refractory metals. Improved lubrication techniques using Corning 7900 glass mixtures were developed for extruding refractory metals at 4000 F. The suitability of Zr oxide ceramic coated steel dies for extrusion at 4000 F was confirmed. Improved extrusion techniques give reproducible, good quality, round and rectangular bar extrusions at temperatures up to 4000 F and reduction ratios of 9.5 to 1. (Author)
Three inch diameter billets of TZM plus 1.5% Cb Molybdenum, alloy tungsten alloys, superalloys (B-1900, 713-C, U-700 and Rene 41), Inconel X were extruded on an instrumented 700 Ton Experimental Extrusion Press to establish a relationship among extrusion pressures, billet material properties, and processing parameters. The following relationship was established: P equals AY plus bY 1n R plus S (cot alpha) 1n R plus 4 k L/D where P is total extrusion pressure, a and b are constants for each die angle, Y is material flow strength at temperature and strain rate of processing, R is reduction ratio, alpha is extrusion die half angle, L is billet length in container, D is container diameter, and S and k are interface shear strength in die and liner respectively. (Author).