Sandvik Intellectual Property Ab

Sandvik Ab

Sandvik Aktiebolag

Sandvik Intellectual Property Aktiebolag

Sanvik Intellectual Property Aktiebolag

Mikael Lindholm

Anders Lenander

Michael Thysell

Lisa Palmqvist

Mikael Lagerquist

Bjorn Ljungberg

Anders Jonsson

Per Lindskog

Markus Rodmar

Ann-Britt Ljungberg

Gunilla Andersson

Frida Cullin

Gunilla Cedergren

Bj&ouml;rn Ljungberg

Mats Ahlgren

Mats Waldenstr&ouml;m

Anders Nordgren

Leif Dahl

Clas Sjogren

Bj&ouml;rn Lungberg

The present invention relates to a cutting tool insert preferably for machining of hardened steel, hot and cold working tool steel, die steel, case hardened steel, high speed steel and ductile grey cast iron and composed of a composite comprising from about 30 to less than about 60 vol-% of a cBN-phase and a binder phase comprising a titaniumcarbonitride phase and a TiBphase. According to the invention, in the XRD pattern from the composite using CuK&#x3b1;-radiation the peak height ratio of the strongest TiBpeak and the strongest cBN peak is less than about 0.02.

Cutting tool insert

The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with

Coated insert

A method of making a cutting insert includes forming a powder mixture containing WC, 2-10 wt % Co, 4-12 wt % cubic carbides, adding N in an amount of 0.9-1.7% of the weight of the cubic carbides, mixing the powder with a pressing agent, milling and spray drying the mixture, compacting and sintering the material at 1300-1500 in an atmosphere of sintering gas 40-60 mbar, applying post-sintering treatment, and applying a coating by CVD or MTCVD.

Method of making cemented carbide insert

Methods of making a coated cemented carbide body include: forming a powder mixture having WC, 5-12 wt % Co, 3-11% cubic carbides of Ta and Ti with a ratio of Ta/Ti is 1.0-4.0; adding N in an amount of 0.6-2.0% of the weight of Ta and Ti; milling and spray-drying the mixture to form a powder; compacting and sintering the powder at a temperature of 1300-1500&#xb0; C., in a controlled atmosphere of about 50 mbar followed by cooling, whereby a body having a binder phase enriched and essentially gamma-phase free surface zone of 5-50 &#x3bc;m in thickness is obtained; applying a pre-coating treatment to the body; and appling a hard, wear-resistant coating to the body.

Cemented carbide insert

A cutting tool insert particularly for turning of steel comprising a body and a coating with a first (innermost) layer system of at least two layers of TiCNOwith x+y+z&#x2266;1 with a total thickness of from about 0.7 to about 4.5 &#x3bc;m, a second layer system to a large extent consisting of AlOand an outermost layer system comprising one or several layers in sequence of TiCN(x+y&#x2266;1) with individual thicknesses of greater than about 0.15 to about 0.8 &#x3bc;m and a layer with AlOwith a thickness greater than about 0.1 to about 0.4 &#x3bc;m with a total thickness of the outermost layer system thinner than about 2.5 &#x3bc;m and a total thickness of the coating in the range of from about 2.0 to about 12.0 &#x3bc;m.

Coated insert and method of making same

A cutting insert has a body formed of a superhard material or a superhard material and a cemented carbide, and has a hole through said body and a preformed hole inlay in said hole to allow securing of the insert to a holder. The method of making same is also disclosed.

Indexable cutting inserts and methods for producing the same

The present invention relates to a coated cemented carbide insert for turning of steel, like low alloyed steels, carbon steels and tough hardened steels at high cutting speeds. The cemented carbide consists of WC, 2-10 wt. % Co and 4-12 wt. % of cubic carbides of metals from groups 4, 5 or 6 of the periodic table, preferably Ti, Ta and Nb. The Co-binder phase is highly alloyed with W with a CW-ratio of 0.75-0.90. The insert has a binder phase enriched and essentially cubic carbide free surface zone A of a thickness of &#x3c;20 &#x3bc;m and along a line C essentially bisecting the edge, in the direction from the edge to the centre of the insert, a binder phase content increases essentially monotonously until it reaches the bulk composition. The binder phase content at the edge is 0.65-0.75 times the binder phase content by volume of the bulk and the depth of the binder phase depletion is 100-300 &#x3bc;m, preferably 150-250 &#x3bc;m. The insert is coated with 3-12 &#x3bc;m columnar TiCN-layer followed by a 2-12 &#x3bc;m thick AlO-layer.

The present invention relates to a cutting tool insert and its methods of manufacture for machining of steel comprising a cemented carbide body and a coatings. The cemented carbide body includes WC, 5-12 wt-% Co and 3-11 wt-% of cubic carbides of metals Ta and Ti. The amount of Nb is below 0.1 wt-% and the ratio Ta/Ti is 1.0-4.0. The Co-binder phase is highly alloyed with W with a CW-ratio of 0.75-0.95 and, finally, the cemented carbide body has a binder phase enriched and essentially gamma phase free surface zone of a thickness of 5-50 &#x3bc;m.

The present invention relates to a coated cemented carbide cutting tool particularly for turning applications with high toughness demands, of stainless steels of different compositions and microstructures, and of low and medium alloyed non-stainless steels. The cemented carbide is WC-Co based with a composition of 9-12 wt % Co, 0.2-2.0 wt % cubic carbides from elements from group IVa, Va or VIa of the periodic table and balance WC with a grain size of 1.5-2 &#x3bc;m. The binder phase is W-alloyed with a CW-ratio in the range of 0.77-0.95. The coating includes a multilayered structure of the composition (TiAl,)N in which x varies repeatedly between the two ranges 0.45&#x3c;x&#x3c;0.55 and 0.70&#x3c;x&#x3c;0.80, adding up to a total thickness of 2-9 &#x3bc;m.

Cemented carbide insert and method of making same

The present invention relates to a cutting tool insert particularly for turning of steel comprising a cemented carbide body, a coating with a post treatment with a first, innermost layer system of one or several layers of TiCNOwith x+y+z&#x2266;1 with a total thickness of 0.7&#x2013;4.5 &#x3bc;m a second multilayer system consisting of a totally 5&#x2013;31 alternating AlOand TiCNO(x+y+z&#x2266;1), preferably &#x3ba;-AlOand TiN, the AlO-layers having an individual layer thickness of &#x3c;0.5 &#x3bc;m and the TiCNO-layers 0.01&#x2013;0.2 &#x3bc;m with a total thickness of the multilayer of 1.0&#x2013;4.0 &#x3bc;m. The multilayer is exposed along the edge line and into the rake and flank face, at least 0.02 mm, from the edge line on the rake face, preferably the contact length of the chip at most 0.9 mm, and 0.02&#x2013;0.20 mm on the flank face.

Coated cemented carbide insert

A method of making a cutting insert includes forming a powder mixture containing WC, 2-10 wt % Co, 4-12 wt % cubic carbides, adding N in an amount of 0.9-1.7 % of the weight of the cubic carbides, mixing the powder with a pressing agent, milling and spray drying the mixture, compacting and sintering the material at 1300-1500 in an atmosphere of sintering gas 40-60 mbar, applying post-sintering treatment, and applying a coating by CVD or MTCVD.

A cemented carbide has a <70 &mgr;m, preferably 10-40 &mgr;m, thick binder phase enriched surface zone containing W and Mo but depleted in cubic carbide. The overall content of Mo in the surface zone is the same as that in the inner portion of the cemented carbide. By alloying the cemented carbide with Mo, the performance has been improved particularly when used for turning at conditions causing intermittent thermal and mechanical load in stainless steel.

Coated cemented carbide cutting tool insert

The present invention relates to a method of making a cemented carbide by mixing powder of WC and possibly other powders forming hard constituents and binder phase and pressing agent, drying, pressing and sintering whereby; the mixing is wet mixing with no change in grain size or grain size distribution of the hard constituent powders; the WC grains are coated with binder metal and deagglomerated prior to the mixing. The sintering is made by microwave sintering at 1325-1410&deg; C. with a holding time of 5-15 min. As a result a cemented carbide with improved properties is obtained.

Method of making cemented carbide

Methods of making a coated cemented carbide body include: forming a powder mixture having WC, 5-12 wt % Co, 3-11% cubic carbides of Ta and Ti with a ratio of Ta/Ti is 1.0-4.0; adding N in an amount of 0.6-2.0% of the weight of Ta and Ti; milling and spray-drying the mixture to form a powder; compacting and sintering the powder at a temperature of 1300-1500&deg; C., in a controlled atmosphere of about 50 mbar followed by cooling, whereby a body having a binder phase enriched and essentially gamma-phase free surface zone of 5-50 &mgr;m in thickness is obtained; applying a pre-coating treatment to the body; and appling a hard, wear-resistant coating to the body.

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Varby, Sweden

Mikael Lindholm