US3322546A - Alloy powder for flame spraying - Google Patents

Alloy powder for flame spraying Download PDF

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US3322546A
US3322546A US362877A US36287764A US3322546A US 3322546 A US3322546 A US 3322546A US 362877 A US362877 A US 362877A US 36287764 A US36287764 A US 36287764A US 3322546 A US3322546 A US 3322546A
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weight
percent
alloy powder
cobalt
flame spraying
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US362877A
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Daniel P Tanzman
Charles E Rogers
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Eutectic Corp
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Eutectic Welding Alloys Corp
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C19/00Alloys based on nickel or cobalt
    • C22C19/07Alloys based on nickel or cobalt based on cobalt
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • C23C4/067Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic

Definitions

  • This invention relates to metal powders for flame spraying and more particularly to iron base alloy powders to be simultaneously flame sprayed and deposited.
  • Deposits formed by flame spraying wherein metallic powder is sprayed and fused upon a metal surface are usually applied to metal surfaces to make them hard and wear resistant.
  • the flame spraying process uses an oxy-acetylene flame as a heat source. Iron base alloys are diflicult to flame spray effectively because they readily oxidize severely and then do not adequately wet the base metal.
  • An object of this invention is to provide an iron base powder which can be used to effectively apply flame sprayed, fused deposits that are resistant to wear and especially to abrasion.
  • Another object is to provide such an alloy that can be deposited with minimum oxidation and with good wetting action on the base metal to be overlayed.
  • the high carbon iron powder is used in an amount between 15 and 70 percent by weight of the total mixture while the cobalt base alloy powder is used in an amount between 85 and 30 percent.
  • the amount of boron contained in the cobalt base alloy on a weight basis is sufficient so that in the total alloy powder composition a percent is maintained between 0.5 and 3.0 percent by weight.
  • the high carbon iron powder and cobalt base alloy powder are present in relatively small particle size such as below 150 mesh. Practically speaking, there is no lower limit on the particle size of the constituents; however, it is preferred to maintain the high carbon iron powder between 150 and 200 mesh.
  • high carbon iron powder iron powder containing from 2.0 to 4.3 percent by weight carbon and preferably from 3.8 to 4.2 percent. A carbon content of 4 percent has been found particularly useful.
  • cobalt base alloy an alloy mesh powder containing cobalt as a major constituent and minor amounts of chromium and carbon and preferably containing minor amounts of both chromium and tungsten in addition to cobalt.
  • the cobalt base alloy further contains boron in amount sufficient to provide from 0.5 to 3 percent by weight of the total cobalt base alloy-high carbon iron composition.
  • cobalt base alloy As a suitable cobalt base alloy, there may be mentioned the following constituents in the following percents by weight.
  • Example Range Carbon 1 The following examples are illustrative of two of the mixtures which meet the objectives of this invention:
  • the finished composition according to this invention has the following ranges of constituents in the stated percentages on a weight basis:
  • compositions according to the invention have been found to be surprisingly resistant to oxidation during flame spraying.
  • the compositions further show good Wetting properties and produce a deposit with a high indentation hardness. Additionally, the deposit shows exceptionally high abrasion resistance in the dry sand abrasion test.
  • the figure is a photomicrograph of a typical deposit according to this invention.
  • the composition used to aazasae deposit this coating corresponds to preferred range II of total chemistry as specified above.
  • the photomicrograph is characterized by a uniform distribution of chromium carbide in a cobalt-iron matrix 7.
  • the matrix hardness is increased by the presence of secondary complex iron-tungsten and iron-chromium carbides 3.
  • the above deposit shows an indentation hardness of Rockwell C 64 and the micro hardness of the matrix indicates a high hardness of Rockwell C 60 to 62.
  • the deposit shows particularly high abrasion resistance in the dry sand abrasion test.
  • An alloy powder composition for flame spraying comprising between 15 and 70 percent by weight of a high carbon iron powder, said high carbon iron powder containing from 2 to 4.3 percent by weight carbon, and between 85 and 30 percent by weight of a cobalt base alloy powder, said cobalt base alloy powder containing the following constituents in the following percents by weight:
  • alloy powder composition according to claim 1 wherein the high carbon iron powder is present in an amount between 50 and 70 percent by weight and the cobalt base alloy is present in an amount between 30 to 50 percent by weight.
  • An alloy powder composition for flame spraying comprising between 15 and 70 percent by weight of a high carbon iron powder, said high carbon iron powder containing from 3.8 to 4.2 percent by weight carbon and between 85 and 30 percent by weight of a cobalt base alloy powder, said cobalt base alloy powder containing the following constituents in the following percents by Weight:
  • the amount of boron present in the cobalt base alloy being suflicient to provide from between 0.5 and 3 percent by weight of the alloy powder composition, said high carbon iron powder having a particle size between and 200 mesh an-d said cobalt base alloy having a particle size below 150 mesh.
  • An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:
  • An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:

Description

y 0, 1967 D. P. TANZMAN ETAL 3,322,546
ALLOY POWDER FOR FLAME SPRAYING Filed April 27, 1964 INVENTORS Daniel, P. Tc: nzmccn,
Charles E113 ens BY fim g T TOBNEYS United States Patent 3,322,546 ALLCY POWDER F OR FLAPE SPRAYENG Daniel P. Tanzman, Far Rockaway, and Charles E.
Rogers, Bayside, N.Y., assignors to Eutectic Welding Alloys Corporation, Flushing, N.Y., a corporation of New York Filed Apr. 27, 1964, Ser. No. 362,877 11 Claims. (Cl. lilo-l) This invention relates to metal powders for flame spraying and more particularly to iron base alloy powders to be simultaneously flame sprayed and deposited.
Deposits formed by flame spraying, wherein metallic powder is sprayed and fused upon a metal surface are usually applied to metal surfaces to make them hard and wear resistant. Generally the flame spraying process uses an oxy-acetylene flame as a heat source. Iron base alloys are diflicult to flame spray effectively because they readily oxidize severely and then do not adequately wet the base metal.
An object of this invention is to provide an iron base powder which can be used to effectively apply flame sprayed, fused deposits that are resistant to wear and especially to abrasion.
Another object is to provide such an alloy that can be deposited with minimum oxidation and with good wetting action on the base metal to be overlayed.
In accordance with this invention, it has been discovered that when mixtures of high carbon iron powder are used in conjunction with cobalt base alloy powders containing specific amounts of boron, the resulting mixture can be deposited satisfactorily with good wetting and minimal oxidation.
The high carbon iron powder is used in an amount between 15 and 70 percent by weight of the total mixture while the cobalt base alloy powder is used in an amount between 85 and 30 percent. The amount of boron contained in the cobalt base alloy on a weight basis is sufficient so that in the total alloy powder composition a percent is maintained between 0.5 and 3.0 percent by weight.
Usually the high carbon iron powder and cobalt base alloy powder are present in relatively small particle size such as below 150 mesh. Practically speaking, there is no lower limit on the particle size of the constituents; however, it is preferred to maintain the high carbon iron powder between 150 and 200 mesh.
By high carbon iron powder is meant iron powder containing from 2.0 to 4.3 percent by weight carbon and preferably from 3.8 to 4.2 percent. A carbon content of 4 percent has been found particularly useful.
By cobalt base alloy is meant an alloy mesh powder containing cobalt as a major constituent and minor amounts of chromium and carbon and preferably containing minor amounts of both chromium and tungsten in addition to cobalt. The cobalt base alloy further contains boron in amount sufficient to provide from 0.5 to 3 percent by weight of the total cobalt base alloy-high carbon iron composition.
As a suitable cobalt base alloy, there may be mentioned the following constituents in the following percents by weight.
3,322,546 Patented May 30, 1967 Percent by Weight Constituent Broad Range Preferred Example Range Carbon 1 The following examples are illustrative of two of the mixtures which meet the objectives of this invention:
Cobalt Chromium High Carbon Tugnsten Alloy Fe Powder Weight percent 30-50 50-70 Preferred mixture, percent. 40 60 Mesh size 150 150 Preferred mesh size --150 150+200 The finished composition according to this invention has the following ranges of constituents in the stated percentages on a weight basis:
Broad Range, Preferred Preferred Constituent Percent Range I, Range II,
Percent Percent As a particular example there may be mentioned the following formulation:
Constituent: Percent by weight Iron 32.1 Carbon 2.9 Tungsten 11.0 Chromium 21.9 Boron 1.4 Cobalt 30.7
The compositions according to the invention have been found to be surprisingly resistant to oxidation during flame spraying. The compositions further show good Wetting properties and produce a deposit with a high indentation hardness. Additionally, the deposit shows exceptionally high abrasion resistance in the dry sand abrasion test.
The figure is a photomicrograph of a typical deposit according to this invention. The composition used to aazasae deposit this coating corresponds to preferred range II of total chemistry as specified above.
The photomicrograph is characterized by a uniform distribution of chromium carbide in a cobalt-iron matrix 7. The matrix hardness is increased by the presence of secondary complex iron-tungsten and iron-chromium carbides 3.
The above deposit shows an indentation hardness of Rockwell C 64 and the micro hardness of the matrix indicates a high hardness of Rockwell C 60 to 62. The deposit shows particularly high abrasion resistance in the dry sand abrasion test.
What is claimed is:
1. An alloy powder composition for flame spraying comprising between 15 and 70 percent by weight of a high carbon iron powder, said high carbon iron powder containing from 2 to 4.3 percent by weight carbon, and between 85 and 30 percent by weight of a cobalt base alloy powder, said cobalt base alloy powder containing the following constituents in the following percents by weight:
Constituents: Weight percent Cobalt 42 to 75 Chromium 22 to 34 Tungsten 2 to 20 Boron 1 to 4 Carbon l to 3 the amount of boron present in the cobalt base alloy being sufficient to provide from between 0.5 and 3 percent by weight of the alloy powder composition.
2. The alloy power composition according to claim 1 wherein the particle size of the high carbon iron powder and cobalt base alloy powder is below 150 mesh.
3. The alloy powder composition according to claim 1 wherein the high carbon iron powder is present in an amount between 30 and 50 percent by weight and the cobalt base alloy powder is present in an amount between 50 and 70 percent by weight.
4. The alloy powder composition according to claim 1 wherein the high carbon iron powder is present in an amount between 50 and 70 percent by weight and the cobalt base alloy is present in an amount between 30 to 50 percent by weight.
5. The alloy powder composition according to claim I. wherein the cobalt base alloy has the following constituents in the following percent by weight:
Constituents: Weight percent Cobalt 45 to 56 Chromium 28 to 33 Tungsten 15 to 18 Boron 1.5 to 2.5 Carbon 2.25 to 2.75
6. The alloy powder composition according to claim 1 wherein the high carbon iron powder contains from 3.8 to 4.2 percent by weight carbon.
7. An alloy powder composition for flame spraying comprising between 15 and 70 percent by weight of a high carbon iron powder, said high carbon iron powder containing from 3.8 to 4.2 percent by weight carbon and between 85 and 30 percent by weight of a cobalt base alloy powder, said cobalt base alloy powder containing the following constituents in the following percents by Weight:
Constituents: Weight percent Cobalt 45 to 56 Chromium 28 to 33 Tungsten 15 to 18 Boron 1.5 to 2.5 Carbon 2.25 to 2.75
the amount of boron present in the cobalt base alloy being suflicient to provide from between 0.5 and 3 percent by weight of the alloy powder composition, said high carbon iron powder having a particle size between and 200 mesh an-d said cobalt base alloy having a particle size below 150 mesh.
8. An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:
Constituent: Percent by weight Iron 15-70 Carbon 1.5-4 Tungsten 0-15 Chromium 5-25 Boron .5-2.5 Cobalt 15-40 9. An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:
Constituent: Percent by weight Iron 30-35 Carbon 2.5-3.0 Tungsten 8-12 Chromium 18-24 Boron 1-1.5 Cobalt 25-33 1.0. An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:
Constituent: Percent by weight Iron 55-60 Carbon 3-3.5 Tungsten 6-9 Chromium 11-15 Boron 0.75-l.5 Cobalt 17-23 11. An alloy powder composition for flame spraying comprising the following constituents in the following percentages by weight:
ALEXANDER H. BRODME-RKEL, Primary Examiner.
MORRIS LIEBMAN, Examiner.
L. B. HAYES, Assistant Examiner.

Claims (1)

1. AN ALLOY POWDER COMPOSITION FOR FLAME SPRAYING COMPRISING BETWEEN 15 AND 70 PERCENT BY WEIGHT OF A HIGH CARBON IRON POWDER, SAID HIGH CARBON IRON POWDER CONTAINING FROM 2 TO 4.3 PERCENT BY WEIGHT CARBON, AND BETWEEN 85 AND 30 PERCENT BY WEIGHT OF A COBALT BASE ALLOY POWDER, SAID COBALT BASE ALLOY POWDER CONTAINING THE FOLLOWING CONSTITUENTS IN THE FOLLOWING PERCENTS BY WEIGHT:
US362877A 1964-04-27 1964-04-27 Alloy powder for flame spraying Expired - Lifetime US3322546A (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419415A (en) * 1964-09-29 1968-12-31 Metco Inc Composite carbide flame spray material
US3436512A (en) * 1966-04-13 1969-04-01 Coast Metals Inc Method of spray coating gas seals of gas turbines and the like
JPS4956839A (en) * 1972-10-06 1974-06-03
US3991240A (en) * 1975-02-18 1976-11-09 Metco, Inc. Composite iron molybdenum boron flame spray powder
US4073639A (en) * 1975-01-06 1978-02-14 United Technologies Corporation Metallic filler material
US4092158A (en) * 1974-11-28 1978-05-30 Goetzewerke Friedrich Goetze Ag Spray powder for the manufacture of layers having high resistance to wear and burn traces
FR2474058A1 (en) * 1980-01-17 1981-07-24 Castolin Sa POWDER FOR THE PRODUCTION OF A THERMAL PROJECTION PROTECTIVE LAYER
US4420543A (en) * 1979-11-09 1983-12-13 Toyota Jidosha Kogyo Kabushiki Kaisha Bearing member of an internal combustion engine, having a flame sprayed surface
US4725512A (en) * 1984-06-08 1988-02-16 Dresser Industries, Inc. Materials transformable from the nonamorphous to the amorphous state under frictional loadings
US20060108033A1 (en) * 2002-08-05 2006-05-25 Atakan Peker Metallic dental prostheses made of bulk-solidifying amorphous alloys and method of making such articles
US20060124209A1 (en) * 2002-12-20 2006-06-15 Jan Schroers Pt-base bulk solidifying amorphous alloys
US20060130943A1 (en) * 2002-07-17 2006-06-22 Atakan Peker Method of making dense composites of bulk-solidifying amorphous alloys and articles thereof
US20060137772A1 (en) * 2002-12-04 2006-06-29 Donghua Xu Bulk amorphous refractory glasses based on the ni(-cu-)-ti(-zr)-a1 alloy system
US20060151031A1 (en) * 2003-02-26 2006-07-13 Guenter Krenzer Directly controlled pressure control valve
US20060157164A1 (en) * 2002-12-20 2006-07-20 William Johnson Bulk solidifying amorphous alloys with improved mechanical properties
US20060191611A1 (en) * 2003-02-11 2006-08-31 Johnson William L Method of making in-situ composites comprising amorphous alloys
US20060237105A1 (en) * 2002-07-22 2006-10-26 Yim Haein C Bulk amorphous refractory glasses based on the ni-nb-sn ternary alloy system
US20060269765A1 (en) * 2002-03-11 2006-11-30 Steven Collier Encapsulated ceramic armor
US20070079907A1 (en) * 2003-10-01 2007-04-12 Johnson William L Fe-base in-situ compisite alloys comprising amorphous phase
US20110081540A1 (en) * 2008-03-14 2011-04-07 Marcus Kennedy Wear-resistant component
US20110186183A1 (en) * 2002-12-20 2011-08-04 William Johnson Bulk solidifying amorphous alloys with improved mechanical properties
US11371108B2 (en) 2019-02-14 2022-06-28 Glassimetal Technology, Inc. Tough iron-based glasses with high glass forming ability and high thermal stability

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035934A (en) * 1957-05-13 1962-05-22 Coast Metals Inc Application of cobalt-base alloys to metal parts
US3238060A (en) * 1964-02-27 1966-03-01 Eutectic Welding Alloys Method for coating metals

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035934A (en) * 1957-05-13 1962-05-22 Coast Metals Inc Application of cobalt-base alloys to metal parts
US3238060A (en) * 1964-02-27 1966-03-01 Eutectic Welding Alloys Method for coating metals

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419415A (en) * 1964-09-29 1968-12-31 Metco Inc Composite carbide flame spray material
US3436512A (en) * 1966-04-13 1969-04-01 Coast Metals Inc Method of spray coating gas seals of gas turbines and the like
JPS4956839A (en) * 1972-10-06 1974-06-03
US4092158A (en) * 1974-11-28 1978-05-30 Goetzewerke Friedrich Goetze Ag Spray powder for the manufacture of layers having high resistance to wear and burn traces
US4073639A (en) * 1975-01-06 1978-02-14 United Technologies Corporation Metallic filler material
US3991240A (en) * 1975-02-18 1976-11-09 Metco, Inc. Composite iron molybdenum boron flame spray powder
US4420543A (en) * 1979-11-09 1983-12-13 Toyota Jidosha Kogyo Kabushiki Kaisha Bearing member of an internal combustion engine, having a flame sprayed surface
FR2474058A1 (en) * 1980-01-17 1981-07-24 Castolin Sa POWDER FOR THE PRODUCTION OF A THERMAL PROJECTION PROTECTIVE LAYER
US4725512A (en) * 1984-06-08 1988-02-16 Dresser Industries, Inc. Materials transformable from the nonamorphous to the amorphous state under frictional loadings
US7157158B2 (en) 2002-03-11 2007-01-02 Liquidmetal Technologies Encapsulated ceramic armor
US20060269765A1 (en) * 2002-03-11 2006-11-30 Steven Collier Encapsulated ceramic armor
US7604876B2 (en) 2002-03-11 2009-10-20 Liquidmetal Technologies, Inc. Encapsulated ceramic armor
USRE45830E1 (en) 2002-03-11 2015-12-29 Crucible Intellectual Property, Llc Encapsulated ceramic armor
US20090239088A1 (en) * 2002-03-11 2009-09-24 Liquidmetal Technologies Encapsulated ceramic armor
US20060130943A1 (en) * 2002-07-17 2006-06-22 Atakan Peker Method of making dense composites of bulk-solidifying amorphous alloys and articles thereof
US7560001B2 (en) 2002-07-17 2009-07-14 Liquidmetal Technologies, Inc. Method of making dense composites of bulk-solidifying amorphous alloys and articles thereof
USRE45353E1 (en) 2002-07-17 2015-01-27 Crucible Intellectual Property, Llc Method of making dense composites of bulk-solidifying amorphous alloys and articles thereof
US20060237105A1 (en) * 2002-07-22 2006-10-26 Yim Haein C Bulk amorphous refractory glasses based on the ni-nb-sn ternary alloy system
US7368022B2 (en) 2002-07-22 2008-05-06 California Institute Of Technology Bulk amorphous refractory glasses based on the Ni-Nb-Sn ternary alloy system
US20060108033A1 (en) * 2002-08-05 2006-05-25 Atakan Peker Metallic dental prostheses made of bulk-solidifying amorphous alloys and method of making such articles
US9782242B2 (en) 2002-08-05 2017-10-10 Crucible Intellectual Propery, LLC Objects made of bulk-solidifying amorphous alloys and method of making same
US8002911B2 (en) 2002-08-05 2011-08-23 Crucible Intellectual Property, Llc Metallic dental prostheses and objects made of bulk-solidifying amorphhous alloys and method of making such articles
USRE47321E1 (en) 2002-12-04 2019-03-26 California Institute Of Technology Bulk amorphous refractory glasses based on the Ni(-Cu-)-Ti(-Zr)-Al alloy system
US20060137772A1 (en) * 2002-12-04 2006-06-29 Donghua Xu Bulk amorphous refractory glasses based on the ni(-cu-)-ti(-zr)-a1 alloy system
US7591910B2 (en) 2002-12-04 2009-09-22 California Institute Of Technology Bulk amorphous refractory glasses based on the Ni(-Cu-)-Ti(-Zr)-Al alloy system
US20060124209A1 (en) * 2002-12-20 2006-06-15 Jan Schroers Pt-base bulk solidifying amorphous alloys
US8882940B2 (en) 2002-12-20 2014-11-11 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
US20060157164A1 (en) * 2002-12-20 2006-07-20 William Johnson Bulk solidifying amorphous alloys with improved mechanical properties
US7896982B2 (en) 2002-12-20 2011-03-01 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
US9745651B2 (en) 2002-12-20 2017-08-29 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
US20110186183A1 (en) * 2002-12-20 2011-08-04 William Johnson Bulk solidifying amorphous alloys with improved mechanical properties
US7582172B2 (en) 2002-12-20 2009-09-01 Jan Schroers Pt-base bulk solidifying amorphous alloys
US8828155B2 (en) 2002-12-20 2014-09-09 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
USRE44385E1 (en) * 2003-02-11 2013-07-23 Crucible Intellectual Property, Llc Method of making in-situ composites comprising amorphous alloys
US7520944B2 (en) 2003-02-11 2009-04-21 Johnson William L Method of making in-situ composites comprising amorphous alloys
US20060191611A1 (en) * 2003-02-11 2006-08-31 Johnson William L Method of making in-situ composites comprising amorphous alloys
US20060151031A1 (en) * 2003-02-26 2006-07-13 Guenter Krenzer Directly controlled pressure control valve
US20070079907A1 (en) * 2003-10-01 2007-04-12 Johnson William L Fe-base in-situ compisite alloys comprising amorphous phase
US7618499B2 (en) 2003-10-01 2009-11-17 Johnson William L Fe-base in-situ composite alloys comprising amorphous phase
USRE47529E1 (en) 2003-10-01 2019-07-23 Apple Inc. Fe-base in-situ composite alloys comprising amorphous phase
US20110081540A1 (en) * 2008-03-14 2011-04-07 Marcus Kennedy Wear-resistant component
US11371108B2 (en) 2019-02-14 2022-06-28 Glassimetal Technology, Inc. Tough iron-based glasses with high glass forming ability and high thermal stability

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