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US2961312A - Cobalt-base alloy suitable for spray hard-facing deposit - Google Patents

Cobalt-base alloy suitable for spray hard-facing deposit Download PDF

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Publication number
US2961312A
US2961312A US812586A US81258659A US2961312A US 2961312 A US2961312 A US 2961312A US 812586 A US812586 A US 812586A US 81258659 A US81258659 A US 81258659A US 2961312 A US2961312 A US 2961312A
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Prior art keywords
cobalt
alloy
base
base alloy
facing
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Expired - Lifetime
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US812586A
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Jerome K Elbaum
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Union Carbide Corp
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Union Carbide Corp
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Priority to US812586A priority Critical patent/US2961312A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/07—Alloys based on nickel or cobalt based on cobalt
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic

Definitions

  • This invention relates to a cobalt-base alloy, and more particularly, to a cobalt-base alloy suitable for depositing by spray hard-facing techniques to other base metals or alloys for producing a hard, wear-resistant surface there-
  • Spray hard-facing is a method by which a wear-resistant coating is deposited on a base metal or alloy by applying a hard facing alloy in the form of powder and subsequently applying heat to cause a metallurgical bonding between the base metal or alloy and wear-resistant coating applied thereto.
  • the surface of the base metal or alloy is cleaned thoroughly, for example, by machining, sand-, or shot-blasting.
  • the alloy to be deposited on the cleaned surface is reduced to a powder by any of the commonly-known techniques.
  • This powder is suspended in a gas stream and passed through a heating means, for example, an oxyacetylene flame.
  • the alloy powder becomes plastic in nature as it passes through the heating means and the force of the gas stream propels the powder, in this plastic state, against the base metal or alloy.
  • the sprayed alloy comes into contact with the base metal, the impact causes a primarily mechanical bond to form between the base metal and the alloy material but some diiiusion may occur and result in the formation of a metallurgical bond.
  • Heat is subsequently applied to fuse the alloy to the base metal or alloy and thus insure complete metallurgical bonding between the alloy material and the base material.
  • Spray hard-facing techniques have been successful employing such metals or alloys as aluminum, copper, lead, nickel, zinc, brass, bronze, Monel metal, and stainless steel, either as the coating material or the base material.
  • Another object of this invention is to provide a new cobalt-base alloy that can be deposited on other metals and alloys by spray hard-facing techniques.
  • Still another object of this invention is to provide an improved process for producing a hard, wear-resistant cobalt-base alloy surface deposit on other metals and alloys by spray hard-facing techniques.
  • a cobalt-base alloy contains, by weight percent, 15 to 30 chromium, 2 to tungsten, 0.8 to 3.0 silicon, 1.5 to 5.0 boron, up to 5 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.3 carbon, and the balance cobalt and incidental impurities.
  • the cobalt-base alloy of this invention possesses the necessary oxidation resistance and fluidity when heated to permit its use in spray hard -facing techniques. It is believed that the unique combination of properties of this alloy may be because of the synergistic effect of the com-v Element: Weight percent Chromium 19.0 to 25.0. Tungsten 4.0 to 5.0.
  • alloy composition can be adjusted to obtain the most advantageous combination of properties.
  • an alloy containing, by weight percent, about 20 chromium, 4.5 tungsten, 1.2 silicon, 2.5 boron, up to 0.1 carbon, and the balance cobalt and incidental impurities has been found to have a desirable combination of good tensile strength, impact strength, and hardness.
  • metallic elements such as iron, nickel, vanadium, and molybdenum
  • metallic elements can be tolerated in an aggregate in amounts of up to about 5 percent and preferably not more than about 3 percent.
  • These materials can be introduced through normal melting practices.
  • Particle size is critical only in that the maximum size and distribution of particle sizes will work satisfactorily in the equipment being used for the application. In general, we have found that all material should pass through a IZO-mesh screen so that satisfactory recovery can be achieved. It is preferred the particles are not so small that they will pass through a 270-mesh screen. The amount of fines which can be present and still permit successful spraying is primarily dependent upon the type of equipment used.
  • the cobalt-base alloy may be prepared by ordinary melting technique, such as induction melting, arc melting, etc.
  • chromium, tungsten, silicon, cobalt, and prealloyed cobalt-boron material in suitable proportions, may be placed in an induction furnace in a magnesia crucible and heated until molten. The melt is then poured into water to produce small particles or shot. The portion of the shotted material that is not of a sufficiently small size is reduced in particle size by any of the commonly-known techniques.
  • the cobalt-base alloy of this invention can be deposited by spray hard-facing techniques on any metal or alloy normally amenable to spray hard-facing.
  • the alloy of this invention may also be used as an alloy deposit to give a hard, wear-resistant surface deposit on metals and alloys by applying this alloy by any of the commonly-known and used techniques, e.g., by using a suitable lacquer base with the powder particles suspended therein, or by spreading the alloy on a base metal surface and heating to fuse the particles to the metal surface, or
  • This material is also amenable to fabrication by ordinary powder metallurgical processes, and to the production of shapes by casting.
  • a cobalt-base alloy containing, by weight percent, 15 to 30 chromium, 2 to 10 tungsten, 0.8 to 3 silicon, 1.5 to 5.0 boron, up to 5 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.1 carbon, and the balance cobalt and incidental impurities.
  • a cobalt-base alloy containing, by weight percent, 19 to 25 chromium, 4 to 5 tungsten, 1 to 2 silicon, 2 to 3.5 boron, up to 3 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.1 carbon, and the balance cobalt and incidental impurities.
  • a cobalt-base alloy containing, by weight percent, about 20 chromium, 4.5 tungsten, 1.2 silicon, 2.5 boron, up to 0.1 carbon, and the balance cobalt and incidental impurities.
  • a cobalt-base alloy containing, by weight percent, about 21 chromium, about 4.6 tungsten, about 2 silicon, about 2.7 boron, 0.04 carbon, and the balance cobalt and incidental impurities.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Coating By Spraying Or Casting (AREA)

Description

United W6 a ent COBALT-BASE ALLOY SUITABLE FOR SPRAY HARD-FACING DEPOSIT Jerome K. Elbanm, Kokomo, Ind., assignor to Union Carbide Corporation, a corporation of New York No Drawing. Filed May 12, 1959, Ser. No. 812,586
4 Claims. (Cl. 75-171) This invention relates to a cobalt-base alloy, and more particularly, to a cobalt-base alloy suitable for depositing by spray hard-facing techniques to other base metals or alloys for producing a hard, wear-resistant surface there- Spray hard-facing is a method by which a wear-resistant coating is deposited on a base metal or alloy by applying a hard facing alloy in the form of powder and subsequently applying heat to cause a metallurgical bonding between the base metal or alloy and wear-resistant coating applied thereto.
in spray hard-facing processes, the surface of the base metal or alloy is cleaned thoroughly, for example, by machining, sand-, or shot-blasting. The alloy to be deposited on the cleaned surface is reduced to a powder by any of the commonly-known techniques. This powder is suspended in a gas stream and passed through a heating means, for example, an oxyacetylene flame. The alloy powder becomes plastic in nature as it passes through the heating means and the force of the gas stream propels the powder, in this plastic state, against the base metal or alloy. When the sprayed alloy comes into contact with the base metal, the impact causes a primarily mechanical bond to form between the base metal and the alloy material but some diiiusion may occur and result in the formation of a metallurgical bond. Heat is subsequently applied to fuse the alloy to the base metal or alloy and thus insure complete metallurgical bonding between the alloy material and the base material.
Spray hard-facing techniques have been successful employing such metals or alloys as aluminum, copper, lead, nickel, zinc, brass, bronze, Monel metal, and stainless steel, either as the coating material or the base material.
However, heretofore it has not been possible to employ spray hard-facing techniques to deposit cobalt-base alloys on other metals or alloys because of a failure to obtain a satisfactory bonding between the cobalt-base alloy and the surface on which it was being deposited.
Accordingly, it is an object of this invention to provide a new cobalt-base alloy.
Another object of this invention is to provide a new cobalt-base alloy that can be deposited on other metals and alloys by spray hard-facing techniques.
Still another object of this invention is to provide an improved process for producing a hard, wear-resistant cobalt-base alloy surface deposit on other metals and alloys by spray hard-facing techniques.
Other aims and advantages of this invention Will be apparent from the following description and appended claims.
In accordance with this invention, a cobalt-base alloy is provided that contains, by weight percent, 15 to 30 chromium, 2 to tungsten, 0.8 to 3.0 silicon, 1.5 to 5.0 boron, up to 5 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.3 carbon, and the balance cobalt and incidental impurities.
The cobalt-base alloy of this invention possesses the necessary oxidation resistance and fluidity when heated to permit its use in spray hard -facing techniques. It is believed that the unique combination of properties of this alloy may be because of the synergistic effect of the com-v Element: Weight percent Chromium 19.0 to 25.0. Tungsten 4.0 to 5.0.
Silicon 1.0 to 2.0.
Boron 2.0 to 3.5.
Iron
Nickel Up to 3 percent in Vanadium the aggregate.
Molybdenum Carbon Up to 0.3.
Cobalt and incidental impurities Balance.
Within these limits the alloy composition can be adjusted to obtain the most advantageous combination of properties. For example, an alloy containing, by weight percent, about 20 chromium, 4.5 tungsten, 1.2 silicon, 2.5 boron, up to 0.1 carbon, and the balance cobalt and incidental impurities has been found to have a desirable combination of good tensile strength, impact strength, and hardness.
The presence of metallic elements, such as iron, nickel, vanadium, and molybdenum, can be tolerated in an aggregate in amounts of up to about 5 percent and preferably not more than about 3 percent. These materials can be introduced through normal melting practices. Incidental impurities, such as sulfur, oxygen, phosphorus, copper, etc., introduced through normal melting practices, should be kept to a minimum. Particle size is critical only in that the maximum size and distribution of particle sizes will work satisfactorily in the equipment being used for the application. In general, we have found that all material should pass through a IZO-mesh screen so that satisfactory recovery can be achieved. It is preferred the particles are not so small that they will pass through a 270-mesh screen. The amount of fines which can be present and still permit successful spraying is primarily dependent upon the type of equipment used.
The cobalt-base alloy may be prepared by ordinary melting technique, such as induction melting, arc melting, etc. For example, chromium, tungsten, silicon, cobalt, and prealloyed cobalt-boron material, in suitable proportions, may be placed in an induction furnace in a magnesia crucible and heated until molten. The melt is then poured into water to produce small particles or shot. The portion of the shotted material that is not of a sufficiently small size is reduced in particle size by any of the commonly-known techniques.
The cobalt-base alloy of this invention can be deposited by spray hard-facing techniques on any metal or alloy normally amenable to spray hard-facing.
Several cobalt-base alloys were prepared and deposited on a mild steel base. The alloys were prepared by melting tungsten, silicon, cobalt, and a prealloyed cobalt-boron material in the desired proportions in a magnesia crucible and heated until molten. The melt was poured into water to produce small particles or shot." The portion of this Patented Nov. 22, 1960 Table 1 Weight Percent Element Alloy Alloy A110 y A llo y No.1 No. 2 No.3 No. 4
Chromium 24.17 19. 19 21. 07 23.97 4. 55 4. 55 4. S 4. 43 2. 68 2. 24 2. 72 3.05 1.32 1.26 l. 98 1.90 0.28 0. 25 0.28 1. 23 0. 05 0. 04 0. 04 0. 10 Cobalt and Incidental Impurities Balance Balance Balance Balance Hardness: Rockwell C 52-55 45-48 53-55 53-54 The hardness of the alloy may be adjusted by controlling the chromium and boron content. Increasing the amount of chromium and/ or boron will increase the hardness of the alloy.
The alloy of this invention may also be used as an alloy deposit to give a hard, wear-resistant surface deposit on metals and alloys by applying this alloy by any of the commonly-known and used techniques, e.g., by using a suitable lacquer base with the powder particles suspended therein, or by spreading the alloy on a base metal surface and heating to fuse the particles to the metal surface, or
by preparing the alloy in the form of a rod and depositing by welding technique.
This material is also amenable to fabrication by ordinary powder metallurgical processes, and to the production of shapes by casting.
What is claimed is:
1. A cobalt-base alloy containing, by weight percent, 15 to 30 chromium, 2 to 10 tungsten, 0.8 to 3 silicon, 1.5 to 5.0 boron, up to 5 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.1 carbon, and the balance cobalt and incidental impurities.
2. A cobalt-base alloy containing, by weight percent, 19 to 25 chromium, 4 to 5 tungsten, 1 to 2 silicon, 2 to 3.5 boron, up to 3 percent in the aggregate of at least one metal selected from the group consisting of iron, nickel, vanadium, and molybdenum, up to 0.1 carbon, and the balance cobalt and incidental impurities.
3. A cobalt-base alloy containing, by weight percent, about 20 chromium, 4.5 tungsten, 1.2 silicon, 2.5 boron, up to 0.1 carbon, and the balance cobalt and incidental impurities.
4. A cobalt-base alloy containing, by weight percent, about 21 chromium, about 4.6 tungsten, about 2 silicon, about 2.7 boron, 0.04 carbon, and the balance cobalt and incidental impurities.
References Cited in the file of this patent UNITED STATES PATENTS 2,165,849 Grossman July 11, 1939 2,855,295 Hansel Oct. 7, 1958 2,868,667 Bowles Jan. 13, 1959

Claims (1)

1. A COBALT-BASE ALLOY CONTAINING, BY WEIGHT PERCENT, 15 TO 30 CHROMIUM, 2 TO 10 TUNGSTEN,0.8 TO 3 SILICON, 1.5 TO 5.0 BORON, UP TO 5 PERCENT IN THE AGGREGATE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL, VANADIUM, AND MOLYBDENUM, UP TO 0.1 CARBON, AND THE BALANCE COBALT AND INCIDENTAL IMMPURITIES.
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167406A (en) * 1963-01-31 1965-01-26 Coast Metals Inc Preparation of brazing alloys and products formed thereby
US3244506A (en) * 1964-09-08 1966-04-05 Allegheny Ludhum Steel Corp Cutting tool material
US3455019A (en) * 1964-05-11 1969-07-15 Eutectic Welding Alloys Method for producing carbide containing materials
US3496682A (en) * 1964-05-05 1970-02-24 Eutectic Welding Alloys Composition for producing cutting and/or wearing surfaces
US3502493A (en) * 1966-01-24 1970-03-24 Forestek Plating & Mfg Co Deposition of micron-sized particles into porous surfaces
US3996398A (en) * 1972-11-08 1976-12-07 Societe De Fabrication D'elements Catalytiques Method of spray-coating with metal alloys
FR2405307A1 (en) * 1977-10-04 1979-05-04 Rolls Royce hard-facing nickel alloys - by using a cobalt chromium silicon (boron) strip and heat bonding
US4469514A (en) * 1965-02-26 1984-09-04 Crucible, Inc. Sintered high speed tool steel alloy composition
US4576642A (en) * 1965-02-26 1986-03-18 Crucible Materials Corporation Alloy composition and process
US20040234407A1 (en) * 2003-03-27 2004-11-25 Hoganas Ab Powder metal composition and method for producing components thereof
US20060198751A1 (en) * 2003-03-27 2006-09-07 Hoganas Ab, Co-based water-atomised powder composition for die compaction
US20060210826A1 (en) * 2005-03-21 2006-09-21 Wu James B C Co-based wire and method for saw tip manufacture and repair
US20070056776A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Abrasive wear-resistant materials, drill bits and drilling tools including abrasive wear-resistant materials, methods for applying abrasive wear-resistant materials to drill bits and drilling tools, and methods for securing cutting elements to a drill bit
US20070056777A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Composite materials including nickel-based matrix materials and hard particles, tools including such materials, and methods of using such materials
US20080029310A1 (en) * 2005-09-09 2008-02-07 Stevens John H Particle-matrix composite drill bits with hardfacing and methods of manufacturing and repairing such drill bits using hardfacing materials
US20080073125A1 (en) * 2005-09-09 2008-03-27 Eason Jimmy W Abrasive wear resistant hardfacing materials, drill bits and drilling tools including abrasive wear resistant hardfacing materials, and methods for applying abrasive wear resistant hardfacing materials to drill bits and drilling tools
US20080083568A1 (en) * 2006-08-30 2008-04-10 Overstreet James L Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures
US20100000798A1 (en) * 2008-07-02 2010-01-07 Patel Suresh G Method to reduce carbide erosion of pdc cutter
US20130306019A1 (en) * 2010-11-09 2013-11-21 Katsunori Otobe High-toughness cobalt-based alloy and engine valve coated with same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165849A (en) * 1939-05-23 1939-07-11 Grossman Cornell Joel Dental casting alloy
US2855295A (en) * 1956-12-26 1958-10-07 Gen Electric Cobalt base hard surfacing alloy
US2868667A (en) * 1956-10-12 1959-01-13 Wall Colmonoy Corp Method and composition for forming a porous metallic coating

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165849A (en) * 1939-05-23 1939-07-11 Grossman Cornell Joel Dental casting alloy
US2868667A (en) * 1956-10-12 1959-01-13 Wall Colmonoy Corp Method and composition for forming a porous metallic coating
US2855295A (en) * 1956-12-26 1958-10-07 Gen Electric Cobalt base hard surfacing alloy

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167406A (en) * 1963-01-31 1965-01-26 Coast Metals Inc Preparation of brazing alloys and products formed thereby
US3496682A (en) * 1964-05-05 1970-02-24 Eutectic Welding Alloys Composition for producing cutting and/or wearing surfaces
US3455019A (en) * 1964-05-11 1969-07-15 Eutectic Welding Alloys Method for producing carbide containing materials
US3244506A (en) * 1964-09-08 1966-04-05 Allegheny Ludhum Steel Corp Cutting tool material
US4576642A (en) * 1965-02-26 1986-03-18 Crucible Materials Corporation Alloy composition and process
US4469514A (en) * 1965-02-26 1984-09-04 Crucible, Inc. Sintered high speed tool steel alloy composition
US3502493A (en) * 1966-01-24 1970-03-24 Forestek Plating & Mfg Co Deposition of micron-sized particles into porous surfaces
US3996398A (en) * 1972-11-08 1976-12-07 Societe De Fabrication D'elements Catalytiques Method of spray-coating with metal alloys
FR2405307A1 (en) * 1977-10-04 1979-05-04 Rolls Royce hard-facing nickel alloys - by using a cobalt chromium silicon (boron) strip and heat bonding
US20040234407A1 (en) * 2003-03-27 2004-11-25 Hoganas Ab Powder metal composition and method for producing components thereof
US20060198751A1 (en) * 2003-03-27 2006-09-07 Hoganas Ab, Co-based water-atomised powder composition for die compaction
US7300488B2 (en) * 2003-03-27 2007-11-27 Höganäs Ab Powder metal composition and method for producing components thereof
US20060210826A1 (en) * 2005-03-21 2006-09-21 Wu James B C Co-based wire and method for saw tip manufacture and repair
US20080073125A1 (en) * 2005-09-09 2008-03-27 Eason Jimmy W Abrasive wear resistant hardfacing materials, drill bits and drilling tools including abrasive wear resistant hardfacing materials, and methods for applying abrasive wear resistant hardfacing materials to drill bits and drilling tools
US20110138695A1 (en) * 2005-09-09 2011-06-16 Baker Hughes Incorporated Methods for applying abrasive wear resistant materials to a surface of a drill bit
US20080029310A1 (en) * 2005-09-09 2008-02-07 Stevens John H Particle-matrix composite drill bits with hardfacing and methods of manufacturing and repairing such drill bits using hardfacing materials
US20070056776A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Abrasive wear-resistant materials, drill bits and drilling tools including abrasive wear-resistant materials, methods for applying abrasive wear-resistant materials to drill bits and drilling tools, and methods for securing cutting elements to a drill bit
US9506297B2 (en) 2005-09-09 2016-11-29 Baker Hughes Incorporated Abrasive wear-resistant materials and earth-boring tools comprising such materials
US7597159B2 (en) 2005-09-09 2009-10-06 Baker Hughes Incorporated Drill bits and drilling tools including abrasive wear-resistant materials
US9200485B2 (en) 2005-09-09 2015-12-01 Baker Hughes Incorporated Methods for applying abrasive wear-resistant materials to a surface of a drill bit
US7703555B2 (en) 2005-09-09 2010-04-27 Baker Hughes Incorporated Drilling tools having hardfacing with nickel-based matrix materials and hard particles
US20100132265A1 (en) * 2005-09-09 2010-06-03 Baker Hughes Incorporated Abrasive wear-resistant materials, methods for applying such materials to earth-boring tools, and methods of securing a cutting element to an earth-boring tool using such materials
US20070056777A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Composite materials including nickel-based matrix materials and hard particles, tools including such materials, and methods of using such materials
US7997359B2 (en) 2005-09-09 2011-08-16 Baker Hughes Incorporated Abrasive wear-resistant hardfacing materials, drill bits and drilling tools including abrasive wear-resistant hardfacing materials
US8002052B2 (en) 2005-09-09 2011-08-23 Baker Hughes Incorporated Particle-matrix composite drill bits with hardfacing
US8758462B2 (en) 2005-09-09 2014-06-24 Baker Hughes Incorporated Methods for applying abrasive wear-resistant materials to earth-boring tools and methods for securing cutting elements to earth-boring tools
US8388723B2 (en) 2005-09-09 2013-03-05 Baker Hughes Incorporated Abrasive wear-resistant materials, methods for applying such materials to earth-boring tools, and methods of securing a cutting element to an earth-boring tool using such materials
US8104550B2 (en) 2006-08-30 2012-01-31 Baker Hughes Incorporated Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures
US20080083568A1 (en) * 2006-08-30 2008-04-10 Overstreet James L Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures
US20100000798A1 (en) * 2008-07-02 2010-01-07 Patel Suresh G Method to reduce carbide erosion of pdc cutter
US20130306019A1 (en) * 2010-11-09 2013-11-21 Katsunori Otobe High-toughness cobalt-based alloy and engine valve coated with same
US9206715B2 (en) * 2010-11-09 2015-12-08 Fukuda Metal Foil & Powder Co., Ltd. High-toughness cobalt-based alloy and engine valve coated with same

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