EXTRUDING AND DRAWING MOLYBDENUM TO COMPLEX THIN H-SECTION.
Abstract
Sixteen solid round extrusions of TZM were made primarily to determine suitable die materials. Reduction ratios at 45:1 and 55:1 were accom plished from a billet heating temperature range of 3000F to 3500F. Extrusion dies were prepared with flame-sprayed zirconia deposits on AISI H13 tool steel and with pressed and sintered solid zirconia nibs. Good extrusion results were obtained with the use of 0.025 and 0.035in. sprayed zirconia at a reduction ratio of 45:1. Extrusions at 55:1 were poor regardless of sprayed coating thickness and billet heating temperature. Good extrusion results were also obtained with pressed and sintered solid zirconia nibs at a reduction ratio of 45:1. Extrusion tooling performed well up to 237,000 psi liner pressure except for noticeable wear which occurred at the liner working surface. On the basis of good surface quality and dimensional runout on round extrusions, H-shaped dies will be prepared with 0.035-in. flame-sprayed zirconia as well as with pressed and sintered solid zirconia. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0430309
Entities
People
- P. A. Santoli
Organizations
- General Electric