Abstract: 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 composition0.85.ltoreq.X.sub.IV .ltoreq.0.990.58.ltoreq.X.sub.C .ltoreq.0.69where X.sub.IV is the molar ratio of the group IV elements of the alloy and X.sub.C is the molar ratio of carbon.

Abstract: 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 composition0.87.ltoreq.X.sub.IV .ltoreq.0.990.66.ltoreq.X.sub.C .ltoreq.0.76where X.sub.IV is the molar ratio of the group IV elements of the alloy and X.sub.C is the molar ratio of carbon.

Abstract: 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 >75% of the grooves have a depth of >12 .mu.m, preferably >15 .mu.m.

Abstract: There is now provided a sintered titanium-based carbonitride alloy for metal cutting containing hard constituents based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and 3-30% binder phase based on Co and/or Ni. The structure contains well-dispersed and/or as agglomerates, 10-50% by volume hard constituent grains essentially without core-rim structure with a mean grain size of 0.8-5 .mu.m in a more fine-grained matrix with a mean grain size of the hard constituents of <1 .mu.m. The matrix is made from a powder being prepared from an intermetallic pre-alloy disintegrated to <50 .mu.m particle size and then carbonitrided in situ to extremely fine-grained hard constituents having a diameter .ltoreq.0.1 .mu.m within the binder phase metals.

Abstract: There is provided a sintered titanium-based carbonitride alloy for metal cutting containing hard constituents based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and 3-30% binder phase based on Co and/or Ni. The structure contains 10-50% by weight well-dispersed Ti-rich hard constituent grains essentially without core-rim structure with a mean grain size of 0.8-5 .mu.m in a conventional carbonitride alloy matrix with a mean grain size of the hard constituents of 1-2 .mu.m. The Ti-rich hard constituent grains are essentially rounded, non-angular grains with an approximately logarithmic normal grain size distribution with a standard deviation of <0.23 logarithmic .mu.m.

Abstract: 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 <1 .mu.m and where said mean grain size of the coarse hard constituents grains is >1.5 .mu.m, preferably >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).

Abstract: 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.

Abstract: 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.

Abstract: 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%.

Abstract: A sintered body of titanium-based carbonitride alloy according to the invention comprises carbonitride hard constituents in 5-25% binder phase where the hard constituents contain, in addition to Ti, one or more of the metals Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and the binder phase is based on cobalt and/or nickel. The sintered body has at least one outer surface with a <50 .mu.m thick surface layer of a titanium-rich cubic carbonitride. Below this layer there is a <100 .mu.m thick binder phase enrichment zone. The binder phase content can be >1.2 of that in the inner part of the body D. Under the binder phase enrichment zone, there is a <250 .mu.m thick binder phase depleted zone C. The binder phase content in this zone has a lowest level <0.9 of the binder phase content in the inner part of the body D.Such sintered bodies are manufactured by heat treatment in an atmosphere of N.sub.2 and/or NH.sub.3 possibly in combination with at least one of CH.sub.4, CO and CO.sub.2 at 1100.degree.-1350.

Abstract: 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 >1.5 times higher than in the rim and >3.5 times higher than in the core of adjacent hard constituent grains. The alloy is produced by a particular method.

Abstract: 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.

Abstract: According to the present invention there is now provided a method of making a sintered titanium-based carbonitride alloy. According to the method, melt-metallurgical raw materials containing the metallic alloying elements for hard constituent-forming as well as binder phase-forming elements are melted and cast, using no intentional additions of the elements C, N, B and O, to form a pre-alloy which in solidified condition of brittle intermetallic phases with hard constituent-forming and binder phase-forming elements mixed in atomic scale. The pre-alloy is crushed and/or milled to powder with grain size <50 .mu.m. The powder is carbonitrided for simultaneous formation in situ of extremely fine-grained <0.1 .mu.m, hard constituent particles enclosed in their binder phase.

Abstract: A cutting insert of a sintered carbonitride alloy and with a complicated geometry, the insert having improved efficiency. This is obtained by giving the powder non-uniform compaction during pressing of the powder into a press-body so that the ultimate working edges will have a higher relative density than the surrounding, more "supporting" material in the press-body. By these means are often obtained surface defects in the form of cracks because of dissolved strains during the sintering.