Title

Development Of Dies For Extrusion Of Complex Shapes Of Steel And Refractory Alloys

Date

1964

Index Abstract

Not Available

Photo Quality

Complete

Report Number

ML TDR 64-295

Creator

Hunt, J. G.

Klein, J. L.

Siergiej, J. M.

Corporate Author

Nuclear Metals Div Textron Inc West Concord Mass

Laboratory

Air Force Materials Laboratory

Date Issued

1964-11-25

Extent

136

Identifier

AD0608497

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(657)-8798

DoD Project

7946

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

The utility of massive ceramic dies for the precision high temperature extrusion of complex shapes of refractory metal alloys has been demonstrated. Precision extrusion of shaped structural steels through ceramic coated dies was gained by refinement and close control of extrusion parameters. Refractory ceramics of high compression strength like ZrO2 or TiC were found capable of extruding TZM molybdenum alloy at 3700F and 75 tsi producing 2.0 by 1.3 by 0.250 inch Tee sections in lengths up to at least fourteen feet with dimensional runout of less than three mils and surface smoothness of 63 rms. Ceramic coated dies, like Al203 coated tool steel, were found capable of extruding 4340 alloy steel at 2300F and about 50 tsi, producing 2.0 by 1.5 by 0.062 inch Tee sections in lengths up to at least forty feet with dimensional runout of less than four mils and surface smoothness of 125 rms. The performance of massive ceramic dies in TZM extrusion indicates that massive ceramic dies would produce steel extrusions superior to those obtained with ceramic coated steel dies.

Report Availability

Full text available

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource