EP1880031A1 - Hartmetallkörper mit zähem oberflächenbereich - Google Patents
Hartmetallkörper mit zähem oberflächenbereichInfo
- Publication number
- EP1880031A1 EP1880031A1 EP06721245A EP06721245A EP1880031A1 EP 1880031 A1 EP1880031 A1 EP 1880031A1 EP 06721245 A EP06721245 A EP 06721245A EP 06721245 A EP06721245 A EP 06721245A EP 1880031 A1 EP1880031 A1 EP 1880031A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- content
- binder
- less
- binder metal
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 56
- 239000002184 metal Substances 0.000 title claims abstract description 56
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011230 binding agent Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 19
- 230000001965 increasing effect Effects 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 150000004767 nitrides Chemical class 0.000 claims abstract description 5
- 238000003754 machining Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract 2
- 239000010959 steel Substances 0.000 claims abstract 2
- 239000010941 cobalt Substances 0.000 claims description 13
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 description 11
- 230000000977 initiatory effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004168 TaNb Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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
- C22C29/06—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 carbides, but not containing other metal compounds
- C22C29/067—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 carbides, but not containing other metal compounds comprising a particular metallic binder
Definitions
- the invention relates to a hard metal body produced by sintering at reduced pressure, formed from carbides, alternatively from carbides with nitrides and / or carbonitrides and a binder metal or matrix metal with at least parts of the surface region, which have an increased material toughness, in particular indexable insert for a machining of Stole.
- the binder metal As a material for the binder metal, which is usually present in a proportion of up to 30 wt .-% in the hard metal, in principle, all higher-melting metals and alloys can be used. In general, however, cobalt is used because cobalt is particularly suitable as binder metal as a connecting element of carbides, nitrides and the like. Hard material particles.
- binder metal content leads to extremely pronounced brittleness of the material with the highest hardness. Although increasing amounts of binding metal lower the hardness of the hard metal, but promote its toughness. Depending on the use of the cemented carbide body, binder metal or cobalt contents of from 2 to 30% by weight are used and in this way the toughness requirements for the material carbide are met.
- this very desirable enrichment of the cobalt content in the surface region of a hard metal object has the disadvantage that the process is time-consuming, that is to say long sintering times in a vacuum and / or in particular repeated sintering in a vacuum. Further, the gradient of cobalt content in the surface region is often difficult to adjust to a desired extent. There may be a steep rise to the surface in a narrow range, which in turn promotes crack initiation and / or crack propagation.
- the invention seeks to eliminate the disadvantages of the prior art and has set itself the goal of creating a cemented carbide body which simultaneously has a desired thickness of the binder metal-enriched surface zone at a time required for sintering to bond the hard material particles with binder metal, wherein the enrichment in this is formed extending.
- the binding metal or matrix metal has an iron content, which is preferably less than 50 wt .-%.
- the advantages achieved by the invention are essentially to be seen in the fact that a cemented carbide body having a surface zone with a higher binder metal content or with a reduced hard material particle fraction can be produced even by sintering at the usual sintering temperature and sintering time, whereby spray formation or crack propagation occurs, in particular Cutting inserts in broken section is substantially reduced.
- the increase in binder metal content is essentially continuous over the entire range, with a zone thickness and zone and a degree of binder metal enrichment dependent on the iron content therein or being adjustable with the iron concentration.
- a sufficient scientific explanation for this desired adjustable surface formation by an iron content in the binder metal can not yet be done; however, it can be considered that iron is highly effective as a catalyst for diffusion processes or transport processes for atoms.
- the iron content in the binder metal has a content of greater than 5 wt .-%, but less than 45 wt .-%, preferably greater than 10 wt .-%, but less than 38 wt .-%, on.
- Iron shares of equal to / less 5 wt .-% cause an unfavorably slow build-up of the accumulation of binder metal below the surface and can lead to less economical production process.
- Iron concentrations of greater than 45% by weight rapidly reduce the hardness of the part in the surface area even with the shortest possible sintering and worsen a corrosion resistance.
- the proportion of binder metal is 4 to 15 wt .-%, preferably 6 to 12 wt .-% and is formed with an alloy of iron, cobalt and / or nickel, carbide body with a particularly favorable property profile, in particular the wear resistance and the toughness concerning created.
- Binder metal contents of less than 4% by weight increase the hardness of the cemented carbide, but lead to embrittlement thereof and thus also with an increase in concentration towards the surface leading to a high tendency of the body or part to break off.
- Higher binder metal contents than 15% by weight reduce the hardness and wear resistance such that, for example, indexable inserts do not have sufficient cutting strength.
- the binding metal content on the surface of the region with increased toughness in Vol .-% at least 1, 2 times, preferably at least 1, 5 times, the binding metal content in the hard metal body, so are also for tools that work with interrupted chip removal, so are intermittently highly loaded, a crack initiation, a crack propagation and a risk of breakage significantly reduced.
- the thickness of the surface region with increased material toughness is greater than 5 ⁇ m, but less than 50 ⁇ m, preferably greater than 10 ⁇ m, but less than 25 ⁇ m.
- the thickness of the surface area with increased binder metal content and increased toughness of the cemented carbide body falls below 5 ⁇ m, effective crack prevention into the material is not sufficiently achieved. Exceeds the range increased toughness, however, 25 microns, so their hardness may not be sufficient, so that plastic material deformations can occur.
- An increase in the wear resistance of the cemented carbide body can be achieved if it carries a coating.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT8352005A AT501801B1 (de) | 2005-05-13 | 2005-05-13 | Hartmetallkörper mit zähem oberflächenbereich |
| PCT/AT2006/000188 WO2006119522A1 (de) | 2005-05-13 | 2006-05-09 | Hartmetallkörper mit zähem oberflächenbereich |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1880031A1 true EP1880031A1 (de) | 2008-01-23 |
| EP1880031B1 EP1880031B1 (de) | 2016-01-06 |
Family
ID=36699038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06721245.6A Not-in-force EP1880031B1 (de) | 2005-05-13 | 2006-05-09 | Hartmetallkörper mit zähem oberflächenbereich |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1880031B1 (de) |
| AT (1) | AT501801B1 (de) |
| WO (1) | WO2006119522A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL2527480T3 (pl) | 2011-05-27 | 2017-12-29 | H.C. Starck Gmbh | Spoiwo NiFe o uniwersalnym zastosowaniu |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3658604A (en) * | 1969-12-29 | 1972-04-25 | Gen Electric | Method of making a high-speed tool steel |
| US4049380A (en) * | 1975-05-29 | 1977-09-20 | Teledyne Industries, Inc. | Cemented carbides containing hexagonal molybdenum |
| CA1319497C (en) * | 1988-04-12 | 1993-06-29 | Minoru Nakano | Surface-coated cemented carbide and a process for the production of the same |
| SE505425C2 (sv) * | 1992-12-18 | 1997-08-25 | Sandvik Ab | Hårdmetall med bindefasanrikad ytzon |
| JPH08302441A (ja) * | 1995-05-02 | 1996-11-19 | Sumitomo Electric Ind Ltd | 耐衝撃工具用超硬合金 |
| US6024776A (en) * | 1997-08-27 | 2000-02-15 | Kennametal Inc. | Cermet having a binder with improved plasticity |
| US6010283A (en) * | 1997-08-27 | 2000-01-04 | Kennametal Inc. | Cutting insert of a cermet having a Co-Ni-Fe-binder |
| DE19752289C1 (de) * | 1997-11-26 | 1999-04-22 | Hartmetall Beteiligungs Gmbh | Gesinterter Hartmetall-Formkörper |
| DE19845376C5 (de) * | 1998-07-08 | 2010-05-20 | Widia Gmbh | Hartmetall- oder Cermet-Körper |
| DE19922057B4 (de) * | 1999-05-14 | 2008-11-27 | Widia Gmbh | Hartmetall- oder Cermet-Körper und Verfahren zu seiner Herstellung |
| SE519235C2 (sv) * | 1999-01-29 | 2003-02-04 | Seco Tools Ab | Hårdmetall med härbar bindefas |
| DE19907749A1 (de) * | 1999-02-23 | 2000-08-24 | Kennametal Inc | Gesinterter Hartmetallkörper und dessen Verwendung |
| SE521488C2 (sv) * | 2000-12-22 | 2003-11-04 | Seco Tools Ab | Belagt skär med järn-nickel-baserad bindefas |
| SE522571C2 (sv) * | 2001-02-08 | 2004-02-17 | Sandvik Ab | Tätningsringar av hårdmetall för dricksvattenstillämpningar |
| DE10225521A1 (de) * | 2002-06-10 | 2003-12-18 | Widia Gmbh | Hartmetall-Substratkörper und Verfahren zu dessen Herstellung |
-
2005
- 2005-05-13 AT AT8352005A patent/AT501801B1/de not_active IP Right Cessation
-
2006
- 2006-05-09 EP EP06721245.6A patent/EP1880031B1/de not_active Not-in-force
- 2006-05-09 WO PCT/AT2006/000188 patent/WO2006119522A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006119522A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006119522A1 (de) | 2006-11-16 |
| AT501801B1 (de) | 2007-08-15 |
| EP1880031B1 (de) | 2016-01-06 |
| AT501801A1 (de) | 2006-11-15 |
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