Sandvik Intellectual Property Ab

Leif Åkesson

Kenneth Westergren

Susanne Norgren

Marian Mikus

Bjorn Ljungberg

Jose Luis Garcia

Björn Ljungberg

Carl-Johan Maderud

Per Mårtensson

Alexandra Kusoffsky

Toril Myrtveit

Marie Pettersson

Anders Stenberg

Elias Forssbeck Nyrot

Rickard Sundström

Ibrahim Sadik

Kare Finneid

José Luis Garcia

Kåre Finneid

The present disclosure relates to a cutting tool of a cemented carbide substrate including WC and a binder phase having one or more of Co, Fe and Ni, wherein the cemented carbide also includes a finely dispersed eta phase of Me12C and/or Me6C carbides, where Me is one or more metals selected from W, Mo and the binder phase metals, wherein the substoichiometric carbon content in the cemented carbide is between &#x2212;0.30 to &#x2212;0.16 wt %. The disclosed cutting tool will achieve an improved resistance against comb cracks.

Cutting tool

The present invention relates to coated cutting tool inserts particularly useful for heavy roughing turning operations of very large steel components, such as drive shafts for ships and shafts for wind power plants. The inserts are large with an iC, inscribed circle diameter, of greater than or equal to about 19 mm and a thickness of greater than or equal to about 6 mm with a composition of from about 5 to about 10 wt-% Co, from about 5 to about 12 wt-% cubic carbides or carbonitrides of the metals Ti, Ta and/or Nb, and balance WC with a stratified binder phase enriched surface zone from about 15 to about 40 &#x3bc;m thick. The inserts have an edge rounding before coating of 35-95 &#x3bc;m. The coating comprises The invention also relates to the method of making such inserts and the use thereof for heavy roughing turning operations of very large steel components.

Coated cemented carbide insert particularly useful for heavy duty operations

The present invention discloses a coated cutting tool insert particularly useful for dry and wet machining, preferably milling, in low and medium alloyed steels, stainless steels, with or without raw surface zones under severe conditions such as vibrations, long overhang and recutting of chips. The insert is characterized by WC&#x2014;Co cemented carbide with a W and Cr alloyed Co-binder phase and a coating including at least three TiCNOlayers and a top layer at least on the rake face of a smooth &#x3b1;-AlO.

Coated cutting tool insert

The present invention relates to a WC&#x2014;Co cemented carbide alloy. By adding an extremely small amount of Ti, V, Zr, Ta or Nb or a combination of these, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Cemented carbide with refined structure

A cutting tool insert has a cermet body with a Co and/or Ni binder phase and a coating deposited as monolayer or as multiple and/or alternating layers of carbide, nitride or oxide. The coating has a thickness of 21-50 &#x3bc;m, when the inserts have a flat rake face, without or with simple chipbreakers and a Co binder phase, or has a thickness of 10-50 &#x3bc;m, when the inserts have a rake face land with a width of 100-300 &#x3bc;m with an angle of 10-25&#xb0; to the rake face and a Co and/or Ni binder phase. The cermet body has more than 50 vol. % Ti-based carbonitride and less than 15 wt % and more than 6 wt % Co and/or Ni binder phase and a hardness of &#x3e;1650 HV3. The disclosure also relates to the use of the coated cutting tool insert for the machining of cast iron work pieces.

Coated cermet cutting tool and use thereof

The present invention relates to a coated cemented carbide milling insert for either wet or dry machining of cast iron such as nodular cast iron (NCI), grey cast iron (GCI), austempered ductile iron (ADI) and compacted graphite iron (CGI) where a high wear resistance and an excellent resistance against thermo cracks are required comprising:

Insert

The present invention relates to a method of machining a metal work piece with a coated cutting tool insert having a cemented carbide body and a coating deposited as monolayer(s) or as multiple and/or alternating layers. The coating has a total thickness of from about 25 to about 75 &#x3bc;m and the machining is performed at a cutting speed of greater than about 600 m/min, preferably from about 800 to about 1500 m/min. The invention also relates to a coated cutting tool useful for such machining operation.

Method for high speed machining and coated cutting tool

A coated turning insert particularly useful for turning of forged components of stainless steel low alloyed steel. The insert is characterized by a WC-Co cemented carbide body having a highly W-alloyed Co-binder phase and a coating including an innermost layer of TiCNOwith columnar grains and a top layer of fine grained &#x3ba;-AlO.

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Älvsjö, Sweden

Leif Åkesson