EXTRUDING AND DRAWING MOLYBDENUM TO COMPLEX THIN H-SECTION.
Abstract
Three solid round extrusions of a commercial arc-cast molybdenum-base alloy, TZM, were made to study die design and materials. This is a total of nineteen round extrusions for this purpose, since the start of the program. Similar extrusion quality was found at a reduction ratio of 55:1 from 3200F billet temperature with the use of flame-sprayed zirconia dies and pressed and sintered solid zirconia nibs. Preliminary results indicated good extrusion quality with the use of 1/8-inch land width and 45:1 reduction ratio from 3000F billet temperature. H-shaped extrusions were made for the first time in the program. The first extrusion involving 306 stainless steel resulted in failure of support tooling. Nevertheless, the extrusion displayed good surface quality. Two TZM H-shaped extrusions made with the failed support tooling also showed good surface quality but poor dimensional runout due to insufficient die support. Only flame-sprayed segmented dies were used. New tooling now in process will double die support previously used. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1964
- Accession Number
- AD0600999
Entities
People
- P. A. Santoli