MACHINING TOOL

Abstract

The invention relates to a machining tool comprising a substrate surface made of a hard metal or a ceramic material; the substrate surface contains carbide-based and/or nitride-based and/or oxide-based hard particles embedded in a cobalt-containing binder matrix, and the substrate surface contains additional atoms implanted using ion beams of at least one species of cations.

Claims

1. A machining tool, comprising: a substrate surface made of a hard metal or a ceramic material, wherein the substrate surface contains carbide-based and/or nitride-based and/or oxide-based hard particles, which are embedded in a cobalt-containing binder matrix, the substrate surface containing additional atoms implanted by means of ion beams of at least one cation species.

2. A machining tool, comprising: a substrate surface, wherein at least one structural modification is on the substrate surface, the substrate surface made of a hard metal or a ceramic material and the substrate surface contains carbide-based and/or nitride-based and/or oxide-based hard particles, which are embedded in a cobalt-containing binder matrix, wherein the structural modification can be achieved by treating the substrate surface with a positively charged ion beam of at least one species of ionized atoms, wherein at least part of the atoms underlying the ion species remains in the substrate structure as additional atoms.

3. The tool according to claim 1, wherein the hard particles are selected from the group consisting of: the carbides, carbonitrides and nitrides of the non-radioactive metals of the IV., V., VI. and VII. subgroups of the periodic table of the elements, boron nitride, oxidic hard materials, titanium carbide, titanium nitride, titanium carbonitride, vanadium carbide, niobium carbide, tantalum carbide, chromium carbide, molybdenum carbide, tungsten carbide, manganese carbide, and rhenium carbide, as well as mixtures and mixed phases thereof.

4. The tool according to claim 1, wherein the binder matrix also contains aluminum, chromium, molybdenum and/or nickel.

5. The tool according to claim 3, wherein the binder matrix also contains aluminum, chromium, molybdenum and/or nickel.

6. The tool according to claim 5, wherein the ceramic material is a sintered hard metal of carbide or carbonitride.

7. The tool according to claim 1, wherein the additional atoms are selected from the group consisting of: lithium, boron, carbon, silicon, nitrogen, phosphorus and oxygen.

8. The tool according to claim 1, wherein the additional atoms are arranged within the substrate structure at a depth of up to approximately 10 m measured from the outer surface of the tool.

9. The tool according to claim 1, wherein the tool is a rotating or stationary tool.

10. The tool according to claim 1, wherein the tool has a monolithic or modular design.

11. The tool according to claim 1, wherein at least one cutting body is provided on a support body and/or at least one guide rail is provided.

12. The tool according to claim 1, wherein the substrate is made of a high-speed tool steel.

13. The tool according to claim 1 wherein the tool comprises at least one functional area that is diamond-coated by means of CVD.

14. The tool according to claim 1, wherein the hard particles are selected from the group consisting of cubic boron nitride, aluminum oxide and chromium oxide.

15. The tool according to claim 1, wherein the additional atoms are selected from the group consisting of nitrogen and carbon.

16. The tool according to claim 1, wherein the tool is a drilling, milling, counterboring, turning, threading, contouring or reaming tool.

17. The tool according to claim 11, wherein the cutting body is an insert.

18. The tool according to claim 11, wherein the cutting body is an indexable insert.

19. The tool according to claim 11, wherein the guide rail is a support rail.

20. The tool according to claim 1, wherein the substrate is made of a steel with the DIN key to steel 1.3343, 1.3243, 1.3344 or 1.3247.

Description

EXAMPLE 1

[0045] Hard metal tools made of a hard metal with 10% Co by mass and an average WC grain size of 0.6 m (Ghring brand name DK460UF) were in accordance with the invention irradiated with an ion stream of nitrogen ions for 3.5 h, wherein the ion stream was generated with a voltage of 30 kV at a plasma current of 3 mA and a nitrogen pressure of 110.sup.5. In this case, a temperature of approximately 400 C. was adjusted on the tool.

[0046] A commercially available ion generator was used for generating the ion beam. The ion generator Hardion of the firm Quertech, Caen, particularly was used in this case.

[0047] In this example, N++ ions are generated during the irradiation, wherein said ions essentially occupy lattice positions and/or interstitial positions in the structure of the metal lattice and potentially can also partially react with the existing transition metals in order to form corresponding metal nitrides.

[0048] In measurements of the Vickers hardness according to DIN EN ISO 6507-1, it was determined that the tools acted upon with the nitrogen ion beam had a Vickers hardness, which was approximately 10 to 15% higher than that of a non-irradiated tool.

EXAMPLE 2

[0049] Tools made of a high-speed steel with the key to steel 1.3343 (Ghring brand name HSS) were in accordance with the invention irradiated with an ion stream of nitrogen ions for 3 h, wherein the ion stream was generated with a voltage of 30 kV at a plasma current of 3 mA and a nitrogen pressure of 110.sup.5. In this case, a temperature of approximately 350 C. was adjusted on the tool.

[0050] A commercially available ion generator according to Example 1 was likewise used for generating the ion beam in this case.

[0051] In measurements of the Vickers hardness according to DIN EN ISO 6507-1, it was determined that the HSS tools acted upon with the nitrogen ion beam had a Vickers hardness, which was approximately 20 to 25% higher than that of a non-irradiated tool.

EXAMPLE 3

[0052] Tools made of a high-speed steel with the key to steel 1.3247 (Ghring brand name HSS-E or M42) were in accordance with the invention irradiated with an ion stream of nitrogen and boron ions (proportion approximately 5% by atom) for 3 h, wherein the ion stream was generated with a voltage of 40 kV at a plasma current of 4 mA and a pressure of 110.sup.5. In this case, a temperature of approximately 370 C. was adjusted on the tool.

[0053] A commercially available ion generator according to Example 1 was likewise used for generating the ion beam in this case.

[0054] In measurements of the Vickers hardness according to DIN EN ISO 6507-1, it was determined that the HSS-E tools acted upon with the nitrogen/boron ion beam had a Vickers hardness, which was approximately 20 to 25% higher than that of a non-irradiated tool.

EXAMPLE 4

[0055] Tools made of a high-speed steel with the key to steel 1.3343 (Ghring brand name HSS) were in accordance with the invention irradiated with an ion stream of nitrogen and carbon ions (proportion approximately 50% by atom) for 3 h, wherein the ion stream was generated with a voltage of 40 kV at a plasma current of 4 mA and a pressure of 110.sup.5. In this case, a temperature of approximately 360 C. was adjusted on the tool.

[0056] A commercially available ion generator according to Example 1 was likewise used for generating the ion beam in this case.

[0057] In measurements of the Vickers hardness according to DIN EN ISO 6507-1, it was determined that the HSS tools acted upon with the nitrogen/carbon ion beam had a Vickers hardness, which was approximately 25 to 35% higher than that of a non-irradiated tool.