Sandvik Ab

Santrade, Ltd

Sandvik Aktiebolag

Rolf G Oskarsson

Gerold Weinl

Ake Ostlund

Carl S Ekemar

Erik G Eriksson

Johan P Von Holst

Peder Von Holst

Per Gustafsson

Anders G Thelin

Kenneth Westergren

Mats O Lundstrom

Ake Stlund

Lars Hultman

Hakan Morberg

Bjorn Hakansson

Gerold Weini

The present invention relates to a method of making a WC&mdash;Co-based cemented carbide with a sintered mean WC-grain size in the range 0.4-1.6 &mgr;m. the cemented carbide is produced from well deagglomerated or easy to deagglomerate WC powder with round morphology, a Co powder also well deagglomerated or easy to deagglomerate and with a grain size equal to or smaller than the WC grain size and grain growth inhibitors. According to the invention the metal part of the grain growth inhibitors is added as part of the binder phase i.e., is included in the Co powder and alloyed therewith.

Fine-grained WC-Co cemented carbide

A sintered body of titanium based carbonitride alloy containing hard constituents based on, in addition to titanium, one or more of the metals Zr, Hf, V, Nb, Ta, Cr, No or W in 5-30% binder phase based on Co and/or Ni is disclosed. The body has a binder phase enriched surface zone with a higher binder phase content than in the inner portion of the body in combination with an enrichment of simple hard constituents, i.e., the share of grains with core-rim structure is lower in the surface zone than in the inner of the body. A method of manufacturing the sintered carbonitride alloy is also provided which comprises forming a powder mixture containing binder phase containing Co and/or Ni and hard constituents of carbides and nitrides with titanium as a main component, the mixture having composition which is substoichiometric regarding an interstitial balance and sintering the mixture to completely transform the substoichiometric phases to stoichiometric by heating a) in vacuum to 1100-1200 C., b) in vacuum at about 1200 C. for about 30 minutes, c) in deoxidizing H.sub.2 -atmosphere for 15-30 minutes at about 1200 C., d) in N.sub.2 -atmosphere during heating to sintering temperature 1400-1600 C., and e) cooling to room temperature in vacuum or inert gas.

Titanium based carbonitride alloy with binder phase enrichment

According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight % binder phase with extremely good properties at intermittent machining of materials difficult to machine. The method relates to the use of a raw material comprising a complex cubic carbonitride containing the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition

Method of producing a sintered carbonitride alloy for intermittent

According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight-% binder phase with extremely good properties at semifinishing operations at turning. The method relates to the use of a raw material consisting of a complex cubic carbonitride comprising the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition

Method of producing a sintered carbonitride alloy for semifinishing

According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 325 weight-% binder phase with extremely good properties at extremely fine machining with high cutting speeds and low feeds. The method relates to the use of a raw material comprising a complex cubic carbonitride containing the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition

Method of producing a sintered carbonitride alloy for fine milling

According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight-% binder phase with extremely good properties at fine to medium coarse milling. The method relates to the use of a raw material consisting of a complex cubic carbonitride comprising the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition

Method of producing a sintered carbonitride alloy for fine to medium

There is provided a solid ball nose tool comprising a hard material with 30-70 volume % submicron hard constituents in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The tool has a constant positive rake angle along the whole end radius of +8+2.degree. and a continuously decreasing clearance angle and towards the center where it is 10.+-.2.degree..

Ball nose end mills

According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight-% binder phase with extremely good properties at extreme fine machining when turning with high cutting rates. The method relates to the use of a raw material comprising a complex cubic carbonitride containing the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition

Method of producing a sintered carbonitride alloy for extremely fine

The present invention relates to a sintered titanium-based carbonitride alloy for milling and turning where the hard constituents are based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W 3-25% binder phase based on Co and/or Ni. the alloy is characterized in that the bottom of the crater caused by the crater wear on an insert used in milling and turning contain grooves with a mutual distance between their peaks of 40-100 .mu.m, preferably 50-80 .mu.m, and where the main part, preferably &gt;75% of the grooves have a depth of &gt;12 .mu.m, preferably &gt;15 .mu.m.

Sintered carbonitride alloy with improved wear resistance

The present invention relates to a sintered titanium-based carbonitride alloy for milling and turning where the hard constituents are based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and the binder phase based on Co and/or Ni. The structure comprises 10-50% by volume hard constituent grains with core-rim-structure with a mean grain size for the cores of 2-8 .mu.m in a more fine-grained matrix with a mean grain size of the hard constituents of &lt;1 .mu.m and where said mean grain size of the coarse hard constituents grains is &gt;1.5 .mu.m, preferably &gt;2 .mu.m, larger than the mean grain size for the grains in the matrix. The coarse grains can be Ti(C,N), (Ti,Ta)C, (Ti,Ta)(C,N) and/or (Ti,Ta,V)(C,N).

Sintered carbonitride alloy with controlled grain size

Method of making sintered insert for milling and turning formed of a titanium-based carbonitride containing hard constituents and binder phase metal comprising milling at least one hard constituent with binder phase metal, adding a second hard constituent at a later time during milling, pressing and sintering the pressed constituents to form the insert.

Method of making a sintered insert

Method of manufacturing a sintered carbonitride alloy comprising wet milling powders of forming binder phase containing Co, Ni and mixture thereof and powder forming hard constituents of nitrides and carbonitrides with Ti as the main component to a mixture with desired composition; compacting said mixture to form compact; heating the compact at 100-300 C. in oxygen or air and subjecting said compact in multiple heating steps to effect sintering.

Sintered carbonitride alloy with highly alloyed binder phase

There now exists a sintered titanium-based carbonitride alloy containing hard constituents with core-rim structure based on, besides Ti, W, one or more of the metals Zr, Hf, V, Mo, Nb, Ta or Cr in 5-30 weight % binder phase based on Co and/or Ni with simultaneously increased wear resistance and toughness. The alloy is characterized in that at least 70%, preferably at least 80%, of said hard constituents have four different types of cores with the following contents of Ti and W in weight % of the total metal content: 1-5 W and 90-95 Ti (1A), 15-25 W and 65-85 Ti (1B), 50-75 W and 20-40 Ti (1C), as well as 20-30 W and 30-60 Ti (2A), whereby the amount of each type is at least 5%.

Titanium-based carbonitride alloy with controlled structure

There is now provided a tool for chipforming machining of metals and similar materials comprising a high speed steel core and a cover of more wear resistant material than the core. If the material in the core has a carbon content 0.05-0.25% lower than the conventional carbon content for the high speed steel in question, improved properties can be obtained.

Compound body

A sintered titanium-based carbonitride alloy contains hard constituents based on, in addition to Ti, W and/or Mo, one or more of the metals Zr, Hf, V, Nb, Ta or Cr in 5-30% binder phase based on Cobalt and/or nickel. The content of tungsten and/or molybdenum, preferably molybdenum in the binder phase is &gt;1.5 times higher than in the rim and &gt;3.5 times higher than in the core of adjacent hard constituent grains. The alloy is produced by a particular method.

Growing community of inventors

Ronninge, Sweden

Rolf G Oskarsson