CA1198343A - Saw chain with hard coating - Google Patents
Saw chain with hard coatingInfo
- Publication number
- CA1198343A CA1198343A CA000419163A CA419163A CA1198343A CA 1198343 A CA1198343 A CA 1198343A CA 000419163 A CA000419163 A CA 000419163A CA 419163 A CA419163 A CA 419163A CA 1198343 A CA1198343 A CA 1198343A
- Authority
- CA
- Canada
- Prior art keywords
- chain
- coated
- saw
- saw chain
- layer
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
- B27B33/14—Saw chains
- B27B33/142—Cutter elements
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physical Vapour Deposition (AREA)
Abstract
A B S T R A C T
A cutting tool, such as a saw chain in a power chain saw, is subject to great wear. The cutting link according to the invention, however, can be coated by a layer of yellow titanium nitride or another nitride, carbide or boride of a transition metal which makes a surface hardness of at least 2000 HV and thus the life of such a chain is multiplied compared to prior known and used coatings, such as chromium.
A cutting tool, such as a saw chain in a power chain saw, is subject to great wear. The cutting link according to the invention, however, can be coated by a layer of yellow titanium nitride or another nitride, carbide or boride of a transition metal which makes a surface hardness of at least 2000 HV and thus the life of such a chain is multiplied compared to prior known and used coatings, such as chromium.
Description
The present i.nventi.on relates to saw chains of power cha.in saws including linl<s of several Icincls, such ax drivi.ng links and cutti.ng links.
It is above all the cutting linl< of the lirlks in a saw chai.n that is subject to wear and requi.res sharpening at certain intervals to make the chain work satisfactorily.
A dull chain causes ~n excessive amount of heating of the wood, which thus beco~es discolored in the saw cut. Further-more, a worn chain impli.es a risk of acci.dent as it may easily break and hurt the operator. It is therefore important to find a material, and a shal~e ~or the cutting link, wilich keeps it sharp for ~ long peri.od of ti.rne. It i.s known to use chrome chain links, wi.th the hard chrome coatin~ being a good stiffening of the cuCtlng e~e of the li.nk. It has been found, however, that the cutti.n~ speecl as wel.l. as the working life of the link,wilL increase hy the a~pli.caci.on of a coating of a harcler surf~ce m~teri.al than those hi.therto used.
Lately, cutti.ng tools have appeared which are coated by compositi.ons wi.thi.n the ternary system Ti.-C-N, substantia11y TiNXCl x ( ~ 1) which do not need to be stoichiometric. An example thercof is the yellow titanium nitride~hich mulciplies the li'fe of the tools. The coating procedure vari.es an(3 incLudes reacti.ve evaporation and sput-tering processes and con~binations oE reactive evaporation and sputterir;g under Cile names of "reactive iOIl plating" and "sputter ion plati.ng". 13y che reactive evaporati.on the titani.u~ metal is bro-l~ht into ~ns ~hase and sfte^ a reaction with a nitrogenous and/or c~rbonaceous ~as to condense as titanium carbonitride or titanium nitrlde or carbide on the object to be coated. sy direct sputteriny, b~7 inert gas.ion bombing of the coating material~ a cathocle si~uttering takes place and the sputterecl ma~erial conclenses as a surface layer on the object to be coated. Reside titanium,transition metals in generaL, together with boron, carbon and nitrogen create a group of very hard materials which in principle are applied as coatin~s l~y processes of the above type of sput-tering and reactive ion plating. ixamples of such coatings ~re CrC, Ti~Ta-C, W-C, ~C (6% C-~), 7r Ti.-N anci Ti-B. The procedures imply a saving of material, ancl quite new coating materials can be used due to the flexibility oE the methods.
They are completely cLean and have no influence c~n personnel or environment, and can also be effected by a sm,lll. number of personnel.
The present invention has, as an object, to improve the properties of the cutking link for a higher cuttin~ speed, less frLction and heat dissipa~
tion in the saw CUt, less demancl Eor sharpening of the links, and a longer liEe of che chaLn by the use of a coating o 20 yellow tit~umnitride or horide, carbide or nitride of a transition metal. Besi~le these improved propert i25, the risk of chain breakag~ and hence the risk of acciclents, wiLl be reduced. All these anci other advantages,as set for~h here--after,will appear when the chain is ~abricate(l in accordance ~5 with the Lnventic)n has the properties stated herein.
An embodimellt of a saw chain according to the invention is shown in the soLe Eigure of the drawLng~ which shows links of such a chain in s ide elevation.
~f~
For the driving oE the saw chain 10 around fl saw guide bar periphery all driving links ll are provLded w:ith proJections 12 which at the inner end of the guide bar mesh wlth tee~h on a chain sprocket wheel, and are intended to be guided in a gui.ding track 13 between longitudinal side plates of the saw guide bar~ Between each pair of driving links in the chain is a side link 14 which has points of support 15 against the edges of the said gu:ide bar plates.
The driving links on each side of the cutting link 16 are include~ in a combination of a side link 17 and the cutting link which also have points of support a~ainst ~he said si.de plates.
When the saw chain moves in a saw cut, the cuttin~
links cu~ the wood and endeavor to swivel around thei.r forward points of support as every one o~ them lies behind (after) the cutting edge whieh then tend~s to cut deeper in the wood. In practice the swivel movement upwards of the cutting link ifi limited by a shoulder attachment 18 located at the forward end of the link. The differenee in levels bet~een the cutting edge and this attachment is the maxlmum cu~ting depth of the cutting l:ink.
Before the chain is assembled~ each one of the links is coated. The usual chrome plating can be used e.g.
on side links and driving links. The cutting link can have two diferent coatings, in which the top surface (or back) 19 and sometimes also the front of the cutting edge 20, which is shown by dashed lines in the Figure, ~re coated by titan-iumnitride or another hard material of the above type by means oE a method, as for example~ mentioned in the introduc-~ion, and the side surfaces and the attachment can bechromed.
^ ~
The embodiment, as describe~ above, is an e~ample of how to practice the present invent:ion. Some modifications of the material and the method are within the scope of the invention, as defined in the following claims.
It is above all the cutting linl< of the lirlks in a saw chai.n that is subject to wear and requi.res sharpening at certain intervals to make the chain work satisfactorily.
A dull chain causes ~n excessive amount of heating of the wood, which thus beco~es discolored in the saw cut. Further-more, a worn chain impli.es a risk of acci.dent as it may easily break and hurt the operator. It is therefore important to find a material, and a shal~e ~or the cutting link, wilich keeps it sharp for ~ long peri.od of ti.rne. It i.s known to use chrome chain links, wi.th the hard chrome coatin~ being a good stiffening of the cuCtlng e~e of the li.nk. It has been found, however, that the cutti.n~ speecl as wel.l. as the working life of the link,wilL increase hy the a~pli.caci.on of a coating of a harcler surf~ce m~teri.al than those hi.therto used.
Lately, cutti.ng tools have appeared which are coated by compositi.ons wi.thi.n the ternary system Ti.-C-N, substantia11y TiNXCl x ( ~ 1) which do not need to be stoichiometric. An example thercof is the yellow titanium nitride~hich mulciplies the li'fe of the tools. The coating procedure vari.es an(3 incLudes reacti.ve evaporation and sput-tering processes and con~binations oE reactive evaporation and sputterir;g under Cile names of "reactive iOIl plating" and "sputter ion plati.ng". 13y che reactive evaporati.on the titani.u~ metal is bro-l~ht into ~ns ~hase and sfte^ a reaction with a nitrogenous and/or c~rbonaceous ~as to condense as titanium carbonitride or titanium nitrlde or carbide on the object to be coated. sy direct sputteriny, b~7 inert gas.ion bombing of the coating material~ a cathocle si~uttering takes place and the sputterecl ma~erial conclenses as a surface layer on the object to be coated. Reside titanium,transition metals in generaL, together with boron, carbon and nitrogen create a group of very hard materials which in principle are applied as coatin~s l~y processes of the above type of sput-tering and reactive ion plating. ixamples of such coatings ~re CrC, Ti~Ta-C, W-C, ~C (6% C-~), 7r Ti.-N anci Ti-B. The procedures imply a saving of material, ancl quite new coating materials can be used due to the flexibility oE the methods.
They are completely cLean and have no influence c~n personnel or environment, and can also be effected by a sm,lll. number of personnel.
The present invention has, as an object, to improve the properties of the cutking link for a higher cuttin~ speed, less frLction and heat dissipa~
tion in the saw CUt, less demancl Eor sharpening of the links, and a longer liEe of che chaLn by the use of a coating o 20 yellow tit~umnitride or horide, carbide or nitride of a transition metal. Besi~le these improved propert i25, the risk of chain breakag~ and hence the risk of acciclents, wiLl be reduced. All these anci other advantages,as set for~h here--after,will appear when the chain is ~abricate(l in accordance ~5 with the Lnventic)n has the properties stated herein.
An embodimellt of a saw chain according to the invention is shown in the soLe Eigure of the drawLng~ which shows links of such a chain in s ide elevation.
~f~
For the driving oE the saw chain 10 around fl saw guide bar periphery all driving links ll are provLded w:ith proJections 12 which at the inner end of the guide bar mesh wlth tee~h on a chain sprocket wheel, and are intended to be guided in a gui.ding track 13 between longitudinal side plates of the saw guide bar~ Between each pair of driving links in the chain is a side link 14 which has points of support 15 against the edges of the said gu:ide bar plates.
The driving links on each side of the cutting link 16 are include~ in a combination of a side link 17 and the cutting link which also have points of support a~ainst ~he said si.de plates.
When the saw chain moves in a saw cut, the cuttin~
links cu~ the wood and endeavor to swivel around thei.r forward points of support as every one o~ them lies behind (after) the cutting edge whieh then tend~s to cut deeper in the wood. In practice the swivel movement upwards of the cutting link ifi limited by a shoulder attachment 18 located at the forward end of the link. The differenee in levels bet~een the cutting edge and this attachment is the maxlmum cu~ting depth of the cutting l:ink.
Before the chain is assembled~ each one of the links is coated. The usual chrome plating can be used e.g.
on side links and driving links. The cutting link can have two diferent coatings, in which the top surface (or back) 19 and sometimes also the front of the cutting edge 20, which is shown by dashed lines in the Figure, ~re coated by titan-iumnitride or another hard material of the above type by means oE a method, as for example~ mentioned in the introduc-~ion, and the side surfaces and the attachment can bechromed.
^ ~
The embodiment, as describe~ above, is an e~ample of how to practice the present invent:ion. Some modifications of the material and the method are within the scope of the invention, as defined in the following claims.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A saw chain for power chain saws including at least one portion having links each with a cutting edge created between a steep front part thereof and a gradually inclined back part wherein one of said parts is hard coated by means of sputtering with a layer of yellow titanium nitride carbide TiNxC1-x, wherein x is between 0 and 1, and parts of said link which are not hard coated are coated by a layer of chromium.
2. A saw chain as claimed in claim 1, wherein the surface hardness of parts coated by a layer of yellow titanium nitride carbide exceeds 2000 HV.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8200221A SE8200221L (en) | 1982-01-15 | 1982-01-15 | HARD COVER CHAIN |
| SE8200221-3 | 1982-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198343A true CA1198343A (en) | 1985-12-24 |
Family
ID=20345737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000419163A Expired CA1198343A (en) | 1982-01-15 | 1983-01-10 | Saw chain with hard coating |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1198343A (en) |
| FR (1) | FR2519896B1 (en) |
| SE (1) | SE8200221L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107428023A (en) * | 2015-03-04 | 2017-12-01 | 胡斯华纳有限公司 | Chain saw chain with the case hardness layer limited on cutting member chain link |
| US11014263B2 (en) * | 2016-09-06 | 2021-05-25 | Husqvarna Ab | Chainsaw chain and/or bar with coatings having specific properties |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920947A (en) * | 1988-04-14 | 1990-05-01 | Blount, Inc. | Chain saw components and system for cutting masonry and the like |
| US5056395A (en) * | 1990-01-24 | 1991-10-15 | Sovac Corporation | Cutter link for a motorized saw chain |
| DE9307394U1 (en) * | 1993-05-15 | 1993-07-29 | Ledermann Gmbh, 72160 Horb | Circular saw blade |
| ATE186488T1 (en) * | 1994-12-05 | 1999-11-15 | Kampmann Gmbh | METHOD FOR SAWING STEEL WORKBOARDS AND SAW BLADE FOR USE IN SUCH PROCESS |
| DE112017007945T8 (en) * | 2017-10-19 | 2020-10-01 | Husqvarna Ab | CHAINSAW CHAIN AND / OR RAIL WITH COATING WITH SPECIFIC PROPERTIES |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE830247C (en) * | 1950-10-26 | 1952-02-04 | Dolmar Maschinen Fabrik Dipl I | Saw chain and saw chain guide for woodworking saws or the like. |
| GB774065A (en) * | 1955-02-10 | 1957-05-01 | Oregon Saw Chain Corp | Improvements in saw chains and methods of sharpening the same |
| US2974695A (en) * | 1958-01-06 | 1961-03-14 | A W Pfeffer | Saw with teeth having wear-resistant facing plates |
| AT383104B (en) * | 1979-09-06 | 1987-05-25 | Inst Novykh Khim Akademii Nauk | METHOD FOR PRODUCING POLYCRYSTALLINE BORNITRIDE |
-
1982
- 1982-01-15 SE SE8200221A patent/SE8200221L/en unknown
-
1983
- 1983-01-10 CA CA000419163A patent/CA1198343A/en not_active Expired
- 1983-01-14 FR FR8300577A patent/FR2519896B1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107428023A (en) * | 2015-03-04 | 2017-12-01 | 胡斯华纳有限公司 | Chain saw chain with the case hardness layer limited on cutting member chain link |
| US11014263B2 (en) * | 2016-09-06 | 2021-05-25 | Husqvarna Ab | Chainsaw chain and/or bar with coatings having specific properties |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8200221L (en) | 1983-07-16 |
| FR2519896A1 (en) | 1983-07-22 |
| FR2519896B1 (en) | 1986-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |