Accession Number:

AD0611589

Title:

EXTRUDING AND DRAWING MOLYBDENUM TO COMPLEX THIN H-SECTION.

Descriptive Note:

Interim technical engineering rept. no. 5, 15 Jul 6415 Jan 65,

Corporate Author:

ALLEGHENY LUDLUM STEEL CORP BRACKENRIDGE PA

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

50.0

Abstract:

Thirteen H-shaped extrusions of wrought arc-cast TZM were made using maximum possible billet length of nine inches. A completed extrusion was possible to .058-.062-inch web thickness from 3360F billet temperature. This extrusion was also accomplished from 3300F with low carbon, wrought arc-cast TZM. As-extruded quality was good in surface finish and web dimensional run-out for twenty-foot lengths. However, considerable growth in fillet-radii occurred starting at a location of ten to twelve feet from the extrusion front-end. During extrusion, a failure in the tongue portion of a pressed and sintered solid zirconia nib resulted in considerable damage to support tooling. However, several previous H-shaped TZM extrusions were accomplished in this program with excellent results using solid zirconia die nibs. Extrusion trials with plasma-sprayed zirconia indicated promising results. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE