GB2137665A - Wear-resistant single-layer coating of metal cutting tool - Google Patents
Wear-resistant single-layer coating of metal cutting tool Download PDFInfo
- Publication number
- GB2137665A GB2137665A GB08413858A GB8413858A GB2137665A GB 2137665 A GB2137665 A GB 2137665A GB 08413858 A GB08413858 A GB 08413858A GB 8413858 A GB8413858 A GB 8413858A GB 2137665 A GB2137665 A GB 2137665A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wear
- hafnium
- coating
- drills
- nitrogen
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
- C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
Abstract
The wear-resistant single-layer coating of a metal cutting tool is a solid solution of hafnium and zirconium compounds containing carbon and/or nitrogen.
Description
SPECIFICATION
Single-layer wear-resistant coating of metalcutting tools
Technical Field
The present invention relates generally to metal cutting and more specifically, to single-layer wearresistant coatings of metal-cutting tools.
Background Art
One of the main trends in modern metal-cutting practice is towards improvements in performance
characteristics of wear-resistant coatings of
metal-cutting tools due to amelioration of their
chemical composition.
Known in the present state of the art is a single
layer wear-resistant coating of metal-cutting tools (cf. US Patent No. 4,169,913, Cl. 428-217, 1979), which is essentially a compound of hafnium with the elements selected from the group of C, N, O.
However, the afore-mentioned coating, due to a high mass of hafnium ions, can practically be applied only to cemented-carbide metal-cutting tools,
One more prior-art single-layer wear-resistant coating of metal-cutting tools (cf. US Patent No.
4,264,682, Cl. 428-336, 1981) is known to be a solid solution of the compounds of two transition
metals of Group IV (of which one is hafnium), with carbon and/or nitrogen.
The coating contains titanium as the other
Group IV transition metal that makes part of compounds with carbon and/or nitrogen.
However, the aforesaid coating features a
relatively high level of intrinsic free energy which results in interaction of the coating with the
material being machined and hence in adversely affected wear resistance of the coating.
Disclosure of the Invention
The principel object of this invention is the
provision of a single-layer wear-resistant coating
of metal-cutting tools, containing such a transition
metal of Group IV in the form of its compounds
with nitrogen and/or carbon as part of a solid solution incorporating also hafnium as compounds
with nitrogen and/or carbon, that would add to the wear resistance of the coating.
The aforesaid object is accomplished due to the fact that in a single-layer wear-resistant coating of
metal-cutting tools, which is in effect a solid solution of compounds of two Group IV transition
metals (one of which is hafnium) with carbon
and/or nitrogen according to the invention, said single-layer wear-resistant coating contains zirconium as the other Group IV transition metal in the form of its compounds with carbon and/or
nitrogen.
The present invention is instrumental in reducing the level of intrinsic free energy of the coating, thus increasing its wear resistance.
Best Mode of Carrying Out the Invention
The single-layer wear-resistant coating can be applied to metal-cutting tools in the following manner.
A metal-cutting tool made from any heretofore used base tool alloys is placed under vacuum, wherein hafnium and zirconium are evaporated and ionized. Then the base metal of the tool is preheated and its working surface is cleaned by bombarding with zirconium and hafnium ions.
Next carbon and/or nitrogen is added and brought to react with hafnium and zirconium, resulting in formation of a solid solution of their compounds, said solution establishing a singlelayer wear-resistant coating on the tool surface.
For a better understanding of the present invention, the following illustrative examples of its practical embodiment are given hereinbelow.
Example 1
Twenty dia. 5 mm drills from steel of the following percentage composition:
C Mn Si Cr W V Mo Fe
0.8 0.5 0.5 3.8 18 1.2 0.8 to make
up 100% that have previously been cleaned of dirt, are placed in a special container and charged in a vacuum chamber, into which a cathode is also installed, made of equal parts of zirconium and hafnium.
Then a rarefaction of 1.33- 10-3 Pa is built up in the chamber, whereupon an electric arc is stricken for zirconium and hafnium to evaporate and ionize.
A negative voltage is applied to the drills in order to accelerate the positively charged zirconium and hafnium ions, whereupon the working surface of the drills is bombarded with the ions of the aforesaid metals for cleaning and preheating the base metal of the tools. Thereupon the voltage applied to the drills is reduced, and nitrogen is admitted to the vacuum chamber to react with hafnium and zirconium with the resultant formation of a single-layer wearresistant coating on the surface of the drills, said coating being composed of a solid solution of hafnium and zirconium compounds with nitrogen.
Finaily the finished drills are withdrawn from the vacuum chamber.
The coating thus obtained has been tested for wear resistance (endurance) by drilling holes 1 5 mm deep in a titanium-aluminium alloy of the following percentage composition: AI--5, Ti being the balance on an upright drill press with ample supply of coolant (10-percent aqueous emulsion), under the following cutting conditions:
S=0.08 mm/rev.
v=7.5 m/min.
where: S is the rate of drill feed into the titanium alloy being machined;
v is the drill rotational speed.
The drill is considered to have got dull when starts squeaking. The test results have demonstrated the endurance of the drills with the present coating to increase from 8 minutes to 24 minutes on the average compared to uncoated drills.
Example 2
Use has been made of drills provided with a single-layer wear-resistant coating as described in
Example 1. Simultaneously with voltage reduction on the drills some acetylene is admitted to the vacuum chamber, with the result that acetylene carbon starts reacting with hafnium and zirconium to form a coating on the surface of the drills, made up of a solid solution of hafnium and zirconium with carbon.
The coating has been tested for wearresistance as in Example 1.
The test results have given evidence that the endurance of the drills increases from 8 to 30
minutes on the average compared to uncoated drills.
Example 3
Use has been made of drills provided with a single-layer wear-resistant coating as described in
Example 1. Concurrently with reduction of the voltage applied to the drills, a mixture of acetylene and nitrogen is admitted to pass to the vacuum chamber, whereupon carbon and nitrogen enter into reaction with hafnium and zirconium to form a coating on the surface of the drills, made up of hafnium and zirconium compounds with nitrogen and carbon.
The coating has been tested for wearresistance as in Example 1.
The test results have indicated that the endurance of the coated drills increases from 8 to 35 minutes compared to uncoated drills.
The present invention is also applicable for bettering performance characteristics of various items operating under conditions of friction, elevated temperatures, high pressures, or corrosive media.
Industrial Applicability
The present invention can find application for machining structural or hardly machinable materials, in particular for machining titaniumbased alloys.
Claims (1)
- CLAIMA single-layer wear-resistant coating of metalcutting tools, being essentially a solid solution of compounds of two Group IV transition metals with carbon and/or nitrogen, one of said metals being hafnium, characterized in that said single-layer wear-resistant coating of metal-cutting tools contains zirconium as the other Group IV transition metal in the form of its compounds with carbon and/or nitrogen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU823511568A SU1128618A1 (en) | 1982-10-10 | 1982-10-10 | Material of wear-resistant coating of metal-cutting tool |
| PCT/SU1983/000032 WO1984001587A1 (en) | 1982-10-10 | 1983-08-25 | Wear-resistant single-layer coating of metal cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8413858D0 GB8413858D0 (en) | 1984-07-04 |
| GB2137665A true GB2137665A (en) | 1984-10-10 |
Family
ID=21035727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08413858A Withdrawn GB2137665A (en) | 1982-10-10 | 1983-08-25 | Wear-resistant single-layer coating of metal cutting tool |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS60500261A (en) |
| AU (1) | AU2073683A (en) |
| DE (1) | DE3390292T1 (en) |
| FI (1) | FI842315A (en) |
| GB (1) | GB2137665A (en) |
| NL (1) | NL8320316A (en) |
| NO (1) | NO842235L (en) |
| SE (1) | SE8403054L (en) |
| SU (1) | SU1128618A1 (en) |
| WO (1) | WO1984001587A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728420A1 (en) * | 1987-08-26 | 1989-03-09 | Detlev Dipl Phys Dr Repenning | METHOD FOR PRODUCING LAYERS WITH HIGHLY HARD AND / OR LOW-FRICTION PROPERTIES |
| US7540912B2 (en) * | 2005-11-02 | 2009-06-02 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Hard films and sputtering targets for the deposition thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2612204A1 (en) * | 1987-03-12 | 1988-09-16 | Vac Tec Syst | METHOD AND APPARATUS FOR VACUUM ELECTRIC ARC PLASMA DEPOSITION OF DECORATIVE COATINGS AND WEAR RESISTANT COATINGS |
| DE3741127A1 (en) * | 1987-12-04 | 1989-06-15 | Repenning Detlev | METHOD FOR PRODUCING HEAT-STABLE LAYERS WITH HIGH-HARD AND / OR LOW-FRICTION PROPERTIES |
| JP2696987B2 (en) * | 1988-09-16 | 1998-01-14 | 株式会社島津製作所 | Thin film manufacturing method |
| BR9810265A (en) | 1997-06-21 | 2000-09-12 | Reinhard Vorrink Sociedade Ale | Decorative tire rims, especially for motor vehicle wheels. |
| RU2492277C2 (en) * | 2005-11-17 | 2013-09-10 | Белерит Гмбх Энд Ко. Кг. | Method of coat application on tool part, coat with at least one layer of carbonitride, cutting tool and cutting insert for it with said coat |
| RU2676718C1 (en) * | 2018-01-22 | 2019-01-10 | Общество с ограниченной ответственностью "Сборные конструкции инструмента, фрезы Москвитина" | Cutting tool for handling products made of hard-to-cut materials and cutting plate therefor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1352241A (en) * | 1971-04-13 | 1974-05-08 | Wilkinson Sword Ltd | Razor blades |
| DE2525185C3 (en) * | 1975-06-06 | 1986-04-17 | Fried. Krupp Gmbh, 4300 Essen | Hard metal body |
| FR2357321A1 (en) * | 1976-07-05 | 1978-02-03 | Stellram Sa | Wear resistant hard metal article - coated with adherent layers of carbide, nitride, oxide, etc. |
-
1982
- 1982-10-10 SU SU823511568A patent/SU1128618A1/en active
-
1983
- 1983-08-25 DE DE19833390292 patent/DE3390292T1/en not_active Withdrawn
- 1983-08-25 WO PCT/SU1983/000032 patent/WO1984001587A1/en active Application Filing
- 1983-08-25 JP JP50327883A patent/JPS60500261A/en active Pending
- 1983-08-25 GB GB08413858A patent/GB2137665A/en not_active Withdrawn
- 1983-08-25 AU AU20736/83A patent/AU2073683A/en not_active Abandoned
- 1983-08-25 NL NL8320316A patent/NL8320316A/en unknown
-
1984
- 1984-06-04 NO NO842235A patent/NO842235L/en unknown
- 1984-06-06 SE SE8403054A patent/SE8403054L/en not_active Application Discontinuation
- 1984-06-07 FI FI842315A patent/FI842315A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728420A1 (en) * | 1987-08-26 | 1989-03-09 | Detlev Dipl Phys Dr Repenning | METHOD FOR PRODUCING LAYERS WITH HIGHLY HARD AND / OR LOW-FRICTION PROPERTIES |
| US7540912B2 (en) * | 2005-11-02 | 2009-06-02 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Hard films and sputtering targets for the deposition thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8403054D0 (en) | 1984-06-06 |
| SU1128618A1 (en) | 1987-03-07 |
| GB8413858D0 (en) | 1984-07-04 |
| FI842315A0 (en) | 1984-06-07 |
| DE3390292T1 (en) | 1985-01-10 |
| NO842235L (en) | 1984-06-04 |
| AU2073683A (en) | 1984-05-04 |
| JPS60500261A (en) | 1985-02-28 |
| WO1984001587A1 (en) | 1984-04-26 |
| NL8320316A (en) | 1984-09-03 |
| FI842315A (en) | 1984-06-07 |
| SE8403054L (en) | 1984-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |