TUNGSTEN EXTRUSION PROGRAM
Abstract
Ingots of W-3% Mo alloy were arc-melted by various electrode preparation techniques, melt rates and crucible sizes to optimize as-cast ingot quality. Ingots were evaluated for purity, soundness, structure and sidewall cleanup. Preliminary extrusions were made with two 6.55-in.-diam. billets at 2.8:1 reduction ratio and 3.725-in.-diam. billets at 11:1 and 17:1 reduction ratios at temperature above 3500F. Extrusion equipment and accessory tooling is discussed. Fine grained, low interstitial ingots were obtainable by blending, isostatic pressing to 1 to 2.5-in.-diam. rods, hydrogen sintering, mechanically joining and single arc-melting with dc straight polarity at a melt rate of less than 2 lb/min with magnetic stirring coil reversal. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 24, 1961
- Accession Number
- AD0266713
Entities
People
- A.e. Riesen
- James Wong