Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
  • C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
  • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware

Definitions

• the invention relates to a hard metal or cermet cutting material for the machining of chromium-containing metal workpieces like for example austenitic, nickel-based alloys, stellites or steel with a carbide, nitride and/or carbonitride-containing hard material phase and a binder phase constituting 3 to 25% mass percent (%) of iron, cobalt and nickel.
• the invention relates further to a use of the hard metal or cermet cutting material for the chip-removing machining of metal workpieces.
• the binder serves to form a liquid phase at the sintering temperature which is in equilibrium with the hard material phase and can wet the latter.
• the liquid binder phase should have a significant solubility for the hard material phase at the sinter temperature but should upon cooling precipitate the latter again. Reactions of the binder phase with the hard material phase which can result in a decomposition or consumption of the binder phase should be suppressed as much as possible.
• the binder phase should have mechanical properties which correspond to the intended use at the temperatures which prevail in use so that the binder can function as much as possible for the fixed but ductile retention of the hard metal or cermet body together.
• the hard metal or cermet cutting material comprises a binder phase with 10 mass % to 75 mass % Co, 10 mass % to 75 mass % Ni, 5 mass % to 30 mass % Cr, >20 mass % to 60 mass % Fe, whereby the sum of the metals Co, Ni, Cr and Fe does not exceed 100%. Further features of this cutting material are described in claims 2 to 5 .
• the binder phase can in addition, contain respectively up to 5% by weight V, Mo and/or Al, up to the solubility limits of Ti, W, Ta/Nb, Zr and/or Hf, as well as up to 15 weight % Mn. Furthermore, the binder can contain oxygen, nitrogen and/or boron up to their maximum solubilities.
• the binder phase has no hexagonal component [proportion].
• the hard metal or cermet body of the invention utilizes the concept that between the metals being machined and the cutting material, with respect to the chromium content, there should be no difference in the concentrations of the alloying components between the workpiece and the tool or only a difference which is as small as possible.
• an interdiffusion of the cobalt from the metal or cermet cutting material on the one hand and the alloying elements of the steel on the other hand during machining should be minimized.
• the binder phase of the cutting material must contain apart from iron, nickel and cobalt also chromium, whereby a good wetability of the nickel and cobalt is ensured by the presence of at least 10% and a maximum of 75% content in the binder phase.
• the binder of the invention has a fcc structure. Above all the adhesion tendency of the cutting material can be avoided only by significant Cr content in the binder.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Powder Metallurgy (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Scissors And Nippers (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=27816033

Family Applications (1)

Country Status (7)

Cited By (7)

Families Citing this family (2)

Citations (3)

Family Cites Families (6)

• 2002
  • 2002-03-28 DE DE10213963A patent/DE10213963A1/de not_active Withdrawn
• 2003
  • 2003-03-21 US US10/509,304 patent/US20050115742A1/en not_active Abandoned
  • 2003-03-21 JP JP2003580582A patent/JP2005521790A/ja active Pending
  • 2003-03-21 DE DE50304470T patent/DE50304470D1/de not_active Expired - Lifetime
  • 2003-03-21 AT AT03722231T patent/ATE335093T1/de not_active IP Right Cessation
  • 2003-03-21 ES ES03722231T patent/ES2270016T3/es not_active Expired - Lifetime
  • 2003-03-21 EP EP03722231A patent/EP1488020B1/fr not_active Expired - Lifetime
  • 2003-03-21 WO PCT/DE2003/000946 patent/WO2003083149A1/fr active IP Right Grant

Patent Citations (3)

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