EP0313549A1 - A steel strip and a tool made thereof - Google Patents

A steel strip and a tool made thereof

Info

Publication number
EP0313549A1
EP0313549A1 EP85905536A EP85905536A EP0313549A1 EP 0313549 A1 EP0313549 A1 EP 0313549A1 EP 85905536 A EP85905536 A EP 85905536A EP 85905536 A EP85905536 A EP 85905536A EP 0313549 A1 EP0313549 A1 EP 0313549A1
Authority
EP
European Patent Office
Prior art keywords
steel
layer
steel strip
impurities
normal amounts
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Withdrawn
Application number
EP85905536A
Other languages
German (de)
French (fr)
Inventor
Allan Lunnerfjord
Roland Sundberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swedev AB
Original Assignee
Swedev AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Swedev AB filed Critical Swedev AB
Publication of EP0313549A1 publication Critical patent/EP0313549A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/127—Straight saw blades; Strap saw blades of special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • 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
    • 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

Definitions

  • This invention relates to a laminated steel strip consisting of at least two layers.
  • the invention also relates to tools made of the laminated material, such as knives, cutters, saws, doctor blades and other scraping tools which are subjected to heavy wear.
  • Knia-knife which has an edge layer of carbon steel with a high carbon content covered on both sides with carbon steel with a lower carbon content, which provides a combination of good edge sharpness and toughness of the knifeblade.
  • knifeblades consisting of stainless, austenitic and martensitic layers are known in the art as well as knifeblades consisting of combinations of layers of carbon steels and stainless steels.
  • Those knife materials which have stainless, martensitic edge layers have some significant advantageous features as compared to knife materials where the edge layer consists of carbon steel.
  • An example of a tool which is designed in this way is described in US-A-3537 828.
  • a first layer consists of a high alloy steel containing in weight-% 1.0-2.5 C, 0.2-1.0 Si, 0.1-2.0 Mn, 4-18 Cr, 0.7-10 Mo, 0-1 Ni, 0-10 W, in total 0-10 V + Ta/Nb + Ti + N, the total content of Cr + Mo + + V + Ta/Nb + Ti + N being at least 12 weight-%, balance substantially iron and impurities in normal contents, while a second layer consists of a low alloy steel containing 0.2-0.6 C, 0.2-2.0 Si, 0.2-1.5 Mn, 0-5 Cr, (preferably 1-5 Cr), 0-0.2 V, 0-1.0 Mo, balance substantially iron and impurities in normal contents.
  • the steel strip consists of a laminate consisting of three layers.
  • the edge or the saw teeth, respectively are provided in the high alloy layer which can be provided either in the center or in the surface layers, respectively.
  • Laminates with high alloy surface layers are adapted for being surface coated by titanium nitride or other hard materials in vacuum or by chemical methods due to the high carbon volume and the composition of the surface layers.
  • Fig. 1A shows a steel strip having the high alloy layer in the center
  • Fig. IB shows a knife made of the steel strip in Fig. 1A
  • Fig. 2A shows a three-layer laminate, in which the two surface layers consist of a high alloy material
  • Fig. 2B shows a knife made of the material in Fig. 2A
  • Fig. 2C shows a perforating knife made of the same material
  • Fig, 2D shows a doctor blade made of the steel blade shown in Fig. 2A
  • Fig. 2E shows an edge swaged three-layer laminate suitable for particularly saws.
  • Example 1 This example concerns a laminated steel strip for knives with a hard and wear resistant edge but without requirements as far as high resistance to tempering is concerned.
  • the layer intended to form the edge or the edges consisted of a steel with a carbon content which varied between about 1.5 and about 2.0 % over the cross section of the centre layer between the two surface layers, about 0.5 Si, about 13.5 Cr, about 1.0 Mo, and about 0.3 V, balance essentially only iron and impurities in normal contents.
  • the variation in above all the carbon content depends on the diffusion of carbon from the low alloy layer to the high alloy edge layer during heating.
  • the low alloy layer contained between 0.2 and 0.6 % C, 0.6 Mn and about 0.3 Cr, the latter also providing a good hardenability to this layer. Hardening from 980°C and fast cooling gave a hardness in the high alloy material of 63-65 HRC. Part of the carbides in the material were dissolved during hardening which facilitates the achievement of a high martensite hardness and a considerable corrosion resistance.
  • the low alloy layer according to this example also contained 0.010 V and 0.5 Mo.
  • the high alloy layer had the same composition as in Example 1, while the low alloy layer contained 0.2 C, 0.6 Mn, 3.0 Cr and 0.5 Mo.
  • the high alloy layer had the following nominal composition: 1.0-1.7 C, 0.9-1.0 Si, 4.0 Cr, 9.0 Mo, 2.5 V, 1.8 W.
  • the low alloy steel had the same composition as in Example 1. This material combination is intended for applications which also require a high resistance to tempering. The addition of tungsten promotes the formation of fine carbides such that the steel obtains features comparable to those of high speed steels mads from powder.
  • the high alloy steel has been designated by the numeral 1 and the low alloy steel by the numeral 2.
  • the thickness of the steelstrip may be between 0.1 and 3 mm.
  • the lamination is carried out by forge (roll) welding.

Abstract

Bande d'acier stratifiée dans laquelle une première couche est constituée d'un acier fortement allié contenant les éléments suivants exprimés en pourcentage en poids: 1.0-2.5 C, 0.2-1.0 Si, 0.1-2.0 Mn, 4-15 Cr, 0.7-18 Mo, 0-1 Ni, 0-10 W, 0-10 (V+Ta/Nb+Ti+N), la teneur totale de Cr+Mo+W+V+Ta/Nb+Ti+N étant au moins de 12% en poids, le solde étant représenté essentiellement par du fer et des impuretés dans des quantités normales; une deuxième couche est constituée d'un acier faiblement allié contenant 0.2-0.6 C, 0.2-2.0 Si, 0.2-1.5 Mn, 0-5 Cr, 0-0.2 V, 0-1.0 Mo, le solde étant constitué essentiellement de fer et d'impuretés dans des quantités normales.Laminated steel strip in which a first layer consists of a high alloy steel containing the following elements expressed in percentage by weight: 1.0-2.5 C, 0.2-1.0 Si, 0.1-2.0 Mn, 4-15 Cr, 0.7- 18 Mo, 0-1 Ni, 0-10 W, 0-10 (V+Ta/Nb+Ti+N), the total content of Cr+Mo+W+V+Ta/Nb+Ti+N being at least 12% by weight, the balance being essentially iron and impurities in normal amounts; a second layer is made of a low alloy steel containing 0.2-0.6 C, 0.2-2.0 Si, 0.2-1.5 Mn, 0-5 Cr, 0-0.2 V, 0-1.0 Mo, the balance being mainly iron and impurities in normal amounts.

Description

A STEEL STRIP AND A TOOL MADE THEREOF
TECHNICAL FIELD
This invention relates to a laminated steel strip consisting of at least two layers. The invention also relates to tools made of the laminated material, such as knives, cutters, saws, doctor blades and other scraping tools which are subjected to heavy wear.
BACKGROUND ART Many compound products are since long made of special steels. Compound steels are made for the chemical industry and the cellulose industry, where a backing material of carbon steel is provided with a coating of stainless steel. It is also known in the art to alloy the backing material with carbide- and nitride-forming elements, particularly titanium, and to hot-roll the compound material and subject it to annealing operations during so long periods of time that the carbon in the stainless cromium steel coating by diffusion into the backing material is reduced to extremely low contents which further improves the corrosion resistance of the stainless surface layer.
In the field of compound materials one can also find the traditional Mora-knife, which has an edge layer of carbon steel with a high carbon content covered on both sides with carbon steel with a lower carbon content, which provides a combination of good edge sharpness and toughness of the knifeblade. Also knifeblades consisting of stainless, austenitic and martensitic layers are known in the art as well as knifeblades consisting of combinations of layers of carbon steels and stainless steels. Those knife materials which have stainless, martensitic edge layers have some significant advantageous features as compared to knife materials where the edge layer consists of carbon steel. An example of a tool which is designed in this way is described in US-A-3537 828. BRIEF DISCLOSURE OF THE INVENTION
It is an object of the invention to provide a laminated steel strip with better features than have been achieved according to known art. Particularly there is an object of the invention to combine a very high hardness of those parts of the tool which are subjected to wear with a good toughness. These and other objects can be achieved by a suitable combination of the alloys in the various layers in the steel strip. According to the invention a first layer consists of a high alloy steel containing in weight-% 1.0-2.5 C, 0.2-1.0 Si, 0.1-2.0 Mn, 4-18 Cr, 0.7-10 Mo, 0-1 Ni, 0-10 W, in total 0-10 V + Ta/Nb + Ti + N, the total content of Cr + Mo + + V + Ta/Nb + Ti + N being at least 12 weight-%, balance substantially iron and impurities in normal contents, while a second layer consists of a low alloy steel containing 0.2-0.6 C, 0.2-2.0 Si, 0.2-1.5 Mn, 0-5 Cr, (preferably 1-5 Cr), 0-0.2 V, 0-1.0 Mo, balance substantially iron and impurities in normal contents.
Normally the steel strip consists of a laminate consisting of three layers. In case the steel strip is intended for the manufacturing of knives or other edge-tools or saws, the edge or the saw teeth, respectively, are provided in the high alloy layer which can be provided either in the center or in the surface layers, respectively. Laminates with high alloy surface layers are adapted for being surface coated by titanium nitride or other hard materials in vacuum or by chemical methods due to the high carbon volume and the composition of the surface layers.
Further features of the invention will be apparent from the appending claims and from the following description of some embodiments chosen by way of example.
BRIEF^DESCRIPTION OF DRAWINGS
In the following description of some embodiments chosen by way of example reference will be made to the attached drawings, in which Fig. 1A shows a steel strip having the high alloy layer in the center, Fig. IB shows a knife made of the steel strip in Fig. 1A,
Fig. 2A shows a three-layer laminate, in which the two surface layers consist of a high alloy material,
Fig. 2B shows a knife made of the material in Fig. 2A,
Fig. 2C shows a perforating knife made of the same material,
Fig, 2D shows a doctor blade made of the steel blade shown in Fig. 2A,
Fig. 2E shows an edge swaged three-layer laminate suitable for particularly saws.
DESCRIPTION OF EMBODIMENTS AND ALLOY COMBINATIONS Example 1 This example concerns a laminated steel strip for knives with a hard and wear resistant edge but without requirements as far as high resistance to tempering is concerned. The layer intended to form the edge or the edges consisted of a steel with a carbon content which varied between about 1.5 and about 2.0 % over the cross section of the centre layer between the two surface layers, about 0.5 Si, about 13.5 Cr, about 1.0 Mo, and about 0.3 V, balance essentially only iron and impurities in normal contents. The variation in above all the carbon content depends on the diffusion of carbon from the low alloy layer to the high alloy edge layer during heating. The low alloy layer contained between 0.2 and 0.6 % C, 0.6 Mn and about 0.3 Cr, the latter also providing a good hardenability to this layer. Hardening from 980°C and fast cooling gave a hardness in the high alloy material of 63-65 HRC. Part of the carbides in the material were dissolved during hardening which facilitates the achievement of a high martensite hardness and a considerable corrosion resistance. In an alternative embodiment the low alloy layer according to this example also contained 0.010 V and 0.5 Mo. Example 2
The high alloy layer had the same composition as in Example 1, while the low alloy layer contained 0.2 C, 0.6 Mn, 3.0 Cr and 0.5 Mo.
Example 3
In this example the high alloy layer had the following nominal composition: 1.0-1.7 C, 0.9-1.0 Si, 4.0 Cr, 9.0 Mo, 2.5 V, 1.8 W. The low alloy steel had the same composition as in Example 1. This material combination is intended for applications which also require a high resistance to tempering. The addition of tungsten promotes the formation of fine carbides such that the steel obtains features comparable to those of high speed steels mads from powder.
In the drawings the high alloy steel has been designated by the numeral 1 and the low alloy steel by the numeral 2. The thickness of the steelstrip may be between 0.1 and 3 mm. The lamination is carried out by forge (roll) welding.

Claims

1. Laminated steel strip consisting of at least two layers, c h a r a c t e r i z e d in that a first layer consists of a high alloy steel containing in weight-%: 1.0 - 2.5 C 0.2 - 1.0 Si 0.1 - 2.0 Mn 4 - 15 Cr 0.7 - 18 Mo 0 - 1 Ni 0 - 10 W
0 - 10 (V + Ta/Nb + Ti + N) the total content of Cr + Mo + W + V + Ta/Nb + Ti + N being at least 12 weight-%, balance substantially iron and impurities in normal amounts, and that a second layer consists of a low alloy steel containing 0.2-0.6 C, 0.2-2.0 Si, 0.2-1.5 Mn, 0-5 Cr, 0-0.2 V 0-1.0 Mo, balance substantially iron and impurities in normal amounts.
2. Steel strip according to claim 1, c h a r a c t e r i z e d in that the second layer has a Cr-content of between 1 and 5 % Cr.
3. Steel strip according to claim 1, c h a r a c t e r i z e d in that the first layer consists of a steel having the composition:
1 - 2 C, preferably 1.3-2.0 C 0.2 - 1.0 Si
0.1 - 2.0 Mn 12 - 14 Cr 1 - 2 Mo max 2.0 V max 1.0 Ni, preferably 0.2-1.0 Ni, balance essentially only iron and impurities in normal amounts.
4. Steel strip according to claim 1, c h a r a c t e r i z e d in that the first layer consists of a steel having the composition: 1.2 - 2.0 C
0.2 - 1.0 Si
0.1 - 2.0 Mn
3 - 7 Cr
5 - 10 Mo
1.5 - 3.5 V
1 - 4 W max 1.0 Ni, preferably 0.2-1.0 Ni, balance essentially only iron and impurities in normal amounts.
5. Steel strip according to any of claims 1-3, c h a r a c - t e r i z e d in that it has a total thickness of 0.1-3 mm.
6. Cutting tool or tool subjected to wear, c h a r a c t e r i z e d in that it is made according to any of claims 1-4.
7. Tool according to claim 5, c h a r a c t e r i z e d in that it has an edge in that layer or those layers which consist of the high alloy first layer.
8. Tool according to claim 6, c h a r a c t e r i z e d in that it consists of a toothed perforating knife, and that the two surface layers consist of the high alloy first steel.
9. Tool according to claim 5, c h a r a c t e r i z e d in that it is a saw.
10. Tool according to claim 5, c h a r a c t e r i z e d in that it is a doctor blade.
EP85905536A 1984-10-12 1985-10-15 A steel strip and a tool made thereof Withdrawn EP0313549A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8405107A SE450495B (en) 1984-10-12 1984-10-12 Laminated tool steel material
PCT/SE1985/000395 WO1987002311A1 (en) 1984-10-12 1985-10-15 A steel strip and a tool made thereof

Publications (1)

Publication Number Publication Date
EP0313549A1 true EP0313549A1 (en) 1989-05-03

Family

ID=26658797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905536A Withdrawn EP0313549A1 (en) 1984-10-12 1985-10-15 A steel strip and a tool made thereof

Country Status (5)

Country Link
EP (1) EP0313549A1 (en)
JP (1) JPS63501064A (en)
FI (1) FI880164A (en)
SE (1) SE450495B (en)
WO (1) WO1987002311A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE459722B (en) * 1987-11-27 1989-07-31 Uddeholm Steel Strip LAMINATED STEEL BAND AND THE STEEL BAND MADE TOOL
JP2732206B2 (en) * 1993-09-13 1998-03-25 日本金属工業株式会社 Manufacturing method of clad material for blades
US5863358A (en) * 1993-12-09 1999-01-26 Uddeholm Strip Steel Aktiebolag Steel alloy saw blade backing strip
SE505042C2 (en) * 1993-12-09 1997-06-16 Uddeholm Steel Strip Steel alloy, steel strip manufactured by the alloy and use of the steel band
DE19924515A1 (en) * 1999-05-28 2000-11-30 Edelstahl Witten Krefeld Gmbh Spray-compacted steel, process for its production and composite material
ITVR20100099A1 (en) * 2010-05-07 2011-11-08 Marmi Zenatelli S R L CUTTING BLADE PARTICULARLY FOR STONE MATERIALS
FR3015336B1 (en) * 2013-12-20 2016-02-05 Seb Sa MULTILAYER CUTTING BLADE COMPRISING A STAINLESS STEEL HEART
EP3572013A1 (en) 2015-02-19 2019-11-27 Stryker Corporation Surgical saw and complementary saw blade, the blade including lock teeth formed out of material that deforms when the blade is secured to the saw
WO2020154464A1 (en) * 2019-01-23 2020-07-30 Verd Steel, Inc. Internal gradient materials, implements and methods
CN112676372B (en) * 2020-12-03 2022-05-24 成都先进金属材料产业技术研究院有限公司 Clad steel plate for multilayer cutter and preparation method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683923A (en) * 1950-01-31 1954-07-20 Universal Cyclops Steel Corp Method of making composite metal products of fusion welded construction
US3930426A (en) * 1972-04-20 1976-01-06 Stora Kopparbergs Bergslags Aktiebolag Method of making a saw blade
US3991930A (en) * 1975-09-22 1976-11-16 Fagersta Ab Method for producing a multi-layer metal strip and metal strip produced according to said method
SE419101B (en) * 1976-12-17 1981-07-13 Uddeholms Ab Bearing material for bimetallic tools where the working material is made of fast steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8702311A1 *

Also Published As

Publication number Publication date
JPS63501064A (en) 1988-04-21
SE8405107L (en) 1986-04-13
WO1987002311A1 (en) 1987-04-23
FI880164A0 (en) 1988-01-14
SE8405107D0 (en) 1984-10-12
SE450495B (en) 1987-06-29
FI880164A (en) 1988-01-14

Similar Documents

Publication Publication Date Title
US5256496A (en) Titanium-steel laminate knife
US4232096A (en) Composite steel material and composite steel tool made from this material
US7210388B2 (en) Bimetal saw band
US5091264A (en) Welded bimetallic sawblade or metal saw band
EP0313549A1 (en) A steel strip and a tool made thereof
US6861161B2 (en) Composite tool
Söderberg et al. Wear mechanisms and tool life of high speed steels related to microstructure
US6194088B1 (en) Stainless steel coated with intermetallic compound and process for producing the same
US3034379A (en) Composite steel saw blades and method of making the same
US6363827B1 (en) Method for producing saw bands
EP0743374B1 (en) Ferrous alloy with Fe-Al diffusion layer and method of making the same
CA1297319C (en) Cobalt base alloy coating for a guide bar of a chain saw
EP0912773B1 (en) Use of a steel for cutting tool holders
US6272963B1 (en) Blade material for metallic band saw and metallic band saw made therefrom
WO2021016202A1 (en) Saw blade having thin film ceramic coating
GB2150151A (en) Triple-layer steel
US4180401A (en) Sintered steel alloy
US4387698A (en) Slurry saw blade head assembly
JP4281000B2 (en) Steel for cutting tools
KR20040066748A (en) wear-resistant cutting, and bending tools
JPH0584363A (en) Scissors and manufacture thereof
Byrley New bimetal band saw blades approach carbide-tipped performance
US3295964A (en) Titanium-tantalum high-speed steel
JPH05146558A (en) Cutting edge member for titanium cutter
US2128146A (en) Sintered hard metal alloys

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19871016

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL

17Q First examination report despatched

Effective date: 19900207

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910309

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SUNDBERG, ROLAND

Inventor name: LUNNERFJORD, ALLAN