DTIC AD0414988: MACHINING OF REFRACTORY MATERIALS pdf

DTIC AD0414988: MACHINING OF REFRACTORY MATERIALS

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The machining characteristics were determined for unalloyed tungsten, molybdenum, columbium and tantalum alloys, Rene 41, B-120VCA titanium, D6AC steel quenched and tempered to 52-58 Rc, Refrasil, Pyroceram, zirconium oxide and aluminum oxide coatings. The selection of this group, is the result of a field survey. This report presents the recommendations for machining these materials. It should be noted that even small deviations in cutting speeds, feed, cutting fluids, tool material and tool geometry can result in significant reductions in tool life. Tests were also conducted on (1) high speed edge milling of high temperature sheet materials and (2) the Tornetic system of drilling and tapping. Successful edge trimming of the high temperature sheet was accomplished in the cutting speed range of 500 to 2000 feet/minute. The Tornetic system has its principal advantage over standard equipment in that it provides a continuous variable cutting speed and feed which, on some materials, makes possible a more efficient cutting condition.

In addition, the Tornetic system has the capability of limiting the available torque on the tool, and thereby eliminates tool breakage

• Creator/s: Defense Technical Information Center
• Date: 5/1/1963
• Year: 1963
• Book Topics/Themes: DTIC Archive, Field, Michael, METCUT RESEARCH ASSOCIATES INC CINCINNATI OH, *REFRACTORY METAL ALLOYS, ALUMINUM COMPOUNDS, ZIRCONIUM COMPOUNDS, MACHINE TOOLS, MACHINING, COMPOSITE MATERIALS, GLASS, STEEL, CERAMIC MATERIALS, TANTALUM ALLOYS, OXIDES, NICKEL ALLOYS, TUNGSTEN, HARDNESS, REFRACTORY MATERIALS, TITANIUM ALLOYS, MOLYBDENUM ALLOYS

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