EP0425061B1 - Métal dur à base de carbonitrure de titane - Google Patents

Métal dur à base de carbonitrure de titane Download PDF

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Publication number
EP0425061B1
EP0425061B1 EP90250269A EP90250269A EP0425061B1 EP 0425061 B1 EP0425061 B1 EP 0425061B1 EP 90250269 A EP90250269 A EP 90250269A EP 90250269 A EP90250269 A EP 90250269A EP 0425061 B1 EP0425061 B1 EP 0425061B1
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EP
European Patent Office
Prior art keywords
hard
metals
hard material
phase
distribution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90250269A
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German (de)
English (en)
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EP0425061A3 (en
EP0425061A2 (fr
Inventor
Volkmar Dr. Rer. Nat. Richter
Heinz Kotsch
Hans-Jörg Klauss
Heidrun Dr. Rer. Nat. Kubsch
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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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
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/04—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbonitrides

Definitions

  • the invention relates to auxiliary metal-bound carbonitride hard metals which are used as sintered molded parts, in particular for the machining of steel. It is also possible to use tools made from this alloy in metal forming technology.
  • Auxiliary metal-bonded carbonitride alloys based on (Ti, Mo) (C, N) as hardness carriers and a nickel-cobalt alloy as binders are known as an advantageous cutting material for steel processing (AT-PS 341 794).
  • AT-PS 341 794 Auxiliary metal-bonded carbonitride alloys based on (Ti, Mo) (C, N) as hardness carriers and a nickel-cobalt alloy as binders are known as an advantageous cutting material for steel processing (AT-PS 341 794).
  • U-PS 341 794 Auxiliary metal-bonded carbonitride alloys based on (Ti, Mo) (C, N) as hardness carriers and a nickel-cobalt alloy as binders are known as an advantageous cutting material for steel processing (AT-PS 341 794).
  • partial replacement of titanium with tantalum leads to an improvement in properties.
  • the well-known hard metals based on titanium carbonitride have proven themselves particularly in the field of fine machining. They are also used for light roughing work with feeds up to 0.5 mm / rev.
  • a disadvantage of these carbonitride alloys is that they are not suitable for heavy cuts and applications with severe cut interruptions.
  • the decisive reason for the limited range of application of the hard metals based on carbonitride, which are often referred to as "cermets" is to be seen in an unfavorable combination of the properties of hardness and fracture toughness. that is, they do not have a sufficiently high fracture toughness and hot hardness at the same time.
  • the aim of the invention is to modify hard metals on the basis of auxiliary metal-bonded carbonitride hard materials so that they are also suitable for roughing and the heavy interrupted cut.
  • the invention has for its object to improve the fracture toughness of the carbonitride hard metals without loss of hot hardness.
  • 1s5 and 1 thus mean the quantiles of the number-related cumulative frequency distribution of the hard material phase in the sintered alloy determined using the known method of linear analysis, ie 95% of all measured chord lengths are less than or equal to 1s5 and 50% less than or equal to 1so.
  • linear analysis electron microscopic imaging methods must be used to ensure sufficient magnification.
  • the hard material phase of titanium carbonitride hard metals generally consists of two phases, a titanium and nitrogen-rich a 'phase and an a "phase, in which the metals of the 6th subgroup of the PSE accumulate.
  • the proportion of the titanium-rich a' phase of the total volume of the hard material phase amount to at least 15 parts by volume, preferably at least 30 parts by volume It is advantageous for the cutting behavior of the hard metals to keep this part of the a'-phase as high as possible.
  • the hard metals according to the invention can be produced in various ways by processes which are known in principle, the processes being controlled in such a way that the narrow grain size distribution of the hard material phase described is obtained. It has proven to be advantageous to start from a hard material with a narrow crystallite size distribution.
  • hard metals based on carbonitrides have a fracture toughness that is up to 3 MPa / m higher when the particle size distribution of the hard material phase is narrowed and that the combination of properties of hot hardness and fracture toughness of WC-TiC-TaC-Co hard metals is achieved.
  • carbonitride hard metals according to the prior art a comparable increase in hot hardness is only possible by increasing the proportion of binder, which leads to a drop in hot hardness by up to 100 units.
  • the property improvements achieved by the particle size distribution of the hard material phase according to the invention lead to particularly favorable properties in the case of hard metals which have a solidification of the binder phase.
  • hard metals with a Ni-Co binder and with a lattice constant of the binder between 0.359 nm and 0.362 nm which indicates a high content of dissolved metals from the hard material phase (Ti, Mo, W, etc.) have proven to be advantageous. You get this high solution state especially for hard materials with reduced non-metal content (0.85 ⁇ z ⁇ 0.92) and increased nitrogen content (0.35 ⁇ y 0.5).
  • the hot hardness is measured at a temperature of 800 ° C in a Vickers vacuum with a load of 108 N and a load duration of 20 s.
  • the fracture toughness is measured at room temperature in accordance with ASTM standard E 399-74.
  • the alloys according to the invention achieve or exceed the commercial hard metals based on WC-TiC-TaC-Co for the application areas P10 / P20 or P30 / P40.
  • the test was carried out on indexable inserts of the form SNUM 150416-340 with a phase (0.15 mm width, 15 ° ) and rounded cutting edges.
  • the average wear mark width VB was measured to determine the progress of wear.
  • the wear was determined after each run, which corresponds to a complete revision of the end faces of the 4 rotating bolts.
  • the service life of the hard metals according to the invention until an average wear mark width of 0.4 mm is reached under test condition 1 in comparison to a commercial grade based on TiC 0.75 N 0.25 with a comparable binder volume fraction (grade A) and a commercial P30 / P40 -Type based on the toilet is shown in Table 3.
  • Tab 4 shows the cutting performance of the alloys under test condition 2.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)
  • Adornments (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Claims (4)

1. Métal dur à base de nitrure de titane et de carbone, de composition générale TiuMevMew (CxNy)z
avec u+v+w=1, y+x=1
0,8 ≦ z ≦, 1,03 u ≧ 0,6
0,2 < y < 0,6

dans laquelle Me représente les métaux Zr, Hf, Nb, Ta, V et Me` représente les métaux W, Mo, Cr ou des mélanges de ces métaux et d'une quantité de 3 à 25 % de la masse de métal de cémentation rapporté au métal dur, pour lequel le métal de cémentation est un métal du groupe du fer, qui renferme les métaux qui viennent en solution à partir de la phase de substance durcie ainsi que d'autres éléments comme par exemple W, Mo, Cr, AI, Si, Mn ou Cu en solution solide ou peut renfermer comme substance intermétallique sous forme de précipitations submicroscopiques, caractérisé en ce que la structure possède une répartition étroite de taille de grains de substance durcie, dans laquelle la répartition des longueurs de fibres remplit la condition I95/I50 2,5, pour la valeur médiane I50 de cette répartition, l'expression 0,2 ≦ I50 5 µm est valable et la fraction de phase a riche en titane au volume total de la phase de substance durcie s'élève au moins à 15 % en volume.
2. Métal dur selon la revendication 1, caractérisé en ce que la répartition des longueurs de fibres de la phase de substance durcie satisfait la condition I95/I50 2.
3. Métal dur selon la revendication 1, caractérisé en ce que pour la valeur médiane de la répartition de longueurs de fibre 150, l'expression 0,5 µm ≦ I50 1,5 µm est valable.
4. Métal dur selon la revendication 1, caractérisé en ce que la fraction de phase a riche en titane au volume total de la phase de substance durcie s'élève au moins à 30 parties en volume.
EP90250269A 1989-10-23 1990-10-22 Métal dur à base de carbonitrure de titane Expired - Lifetime EP0425061B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD89333806A DD288623A5 (de) 1989-10-23 1989-10-23 Hartmetall auf der basis von titankarbonitrid
DD333806 1989-10-23

Publications (3)

Publication Number Publication Date
EP0425061A2 EP0425061A2 (fr) 1991-05-02
EP0425061A3 EP0425061A3 (en) 1991-08-14
EP0425061B1 true EP0425061B1 (fr) 1994-07-13

Family

ID=5613187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250269A Expired - Lifetime EP0425061B1 (fr) 1989-10-23 1990-10-22 Métal dur à base de carbonitrure de titane

Country Status (4)

Country Link
EP (1) EP0425061B1 (fr)
AT (1) ATE108493T1 (fr)
DD (1) DD288623A5 (fr)
DE (1) DE59006418D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500048C2 (sv) * 1991-06-12 1994-03-28 Sandvik Ab Sätt att tillverka sintrade karbonitridlegeringar
CN101679130B (zh) * 2008-05-20 2013-08-28 揖斐电株式会社 蜂窝结构体
CN111519115B (zh) * 2020-03-25 2021-12-28 成都美奢锐新材料有限公司 一种高韧性高耐磨性碳氮化钛基金属陶瓷材料及制备方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971656A (en) * 1973-06-18 1976-07-27 Erwin Rudy Spinodal carbonitride alloys for tool and wear applications
SE392482B (sv) * 1975-05-16 1977-03-28 Sandvik Ab Pa pulvermetallurgisk veg framstelld legering bestaende av 30-70 volymprocent
US4120719A (en) * 1976-12-06 1978-10-17 Sumitomo Electric Industries, Ltd. Cemented carbonitride alloys containing tantalum

Also Published As

Publication number Publication date
DD288623A5 (de) 1991-04-04
DE59006418D1 (de) 1994-08-18
EP0425061A3 (en) 1991-08-14
EP0425061A2 (fr) 1991-05-02
ATE108493T1 (de) 1994-07-15

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