Method of machining nickel based superalloys

Patent · Tue Jun 08 04:00:00 EDT 1993

OSTI ID:6465296

Buljan, S T; Lingertat, H; Wayne, S F

A method for machining is described comprising the steps of: machining a work piece at an effective cutting speed of up to about 1,500 surface feet per minute; moving a ceramic metal cutting tool across the face of said work piece at a feed rate of up to about 0.04 inches per revolution; and cutting said work piece with said ceramic metal cutting tool to effect a depth of cut of up to about 0.15 inches per pass; wherein said ceramic-metal cutting tool has a density of at least about 95% of theoretical, and comprises about 80-98% by volume of granular hard phases consisting essentially of: a major hard phase portion consisting essentially of alumina with about 0-2% by volume of one or more oxides selected from the group consisting of magnesia, zirconia, yttria, hafnia, and silica; and a minor hard phase portion selected from the group consisting of the hard refractory carbides, nitrides, carbonitrides, and borides of metals of Groups 4b, 5b, and 6b of the Periodic Table of the Elements, and combinations thereof; and about 2-20% by volume of a metal phase consisting essentially of: a combination of nickel and aluminum having a ratio d nickel to aluminum of from about 80:20 to about 90: 10 by weight; and 0-5% by volume of an additive selected from the group consisting of titanium, zirconium, hafnium, vanadium niobium, tantalum, chromium, molybdenum, tungsten, cobalt, boron, and carbon, and combinations thereof 22. A method for machining a high temperature, nickel based alloy work piece comprising the steps of: turning said work piece on a lathe at an effective cutting speed of up to about 1,500 surface feet per minute; moving a ceramic-metal cutting tool across the face of said work piece at a feed rate of up to about 0.04 inches per revolution; and cutting said work piece with said ceramic-metal cutting tool to effect a depth of cut of up to about 0. 15 inches per pass.

• Assignee: GTE Valenite Corp., Troy, MI (United States)
• Patent Number(s): US 5216845; A
• Application Number: PPN: US 7-693492
• OSTI ID: 6465296
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
CHEMICAL COMPOSITION
CUTTING TOOLS
DESIGN
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MACHINING
MATERIALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
TOOLS