EP3354758A1 - Nouveau mélange de poudre - Google Patents

Nouveau mélange de poudre Download PDF

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Publication number
EP3354758A1
EP3354758A1 EP17153509.9A EP17153509A EP3354758A1 EP 3354758 A1 EP3354758 A1 EP 3354758A1 EP 17153509 A EP17153509 A EP 17153509A EP 3354758 A1 EP3354758 A1 EP 3354758A1
Authority
EP
European Patent Office
Prior art keywords
powder
metal
mns
balance
friction
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Withdrawn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
EP17153509.9A
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German (de)
English (en)
Inventor
Senad Dizdar
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.)
Hoganas AB
Original Assignee
Hoganas 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 Hoganas AB filed Critical Hoganas AB
Priority to EP17153509.9A priority Critical patent/EP3354758A1/fr
Priority to PCT/EP2018/051935 priority patent/WO2018138247A1/fr
Priority to US16/480,517 priority patent/US20190388964A1/en
Priority to CN201880008470.9A priority patent/CN110225986A/zh
Publication of EP3354758A1 publication Critical patent/EP3354758A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • 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
    • 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
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/05—Light metals
    • B22F2301/052—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/35—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2302/00—Metal Compound, non-Metallic compound or non-metal composition of the powder or its coating
    • B22F2302/40—Carbon, graphite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2303/00—Functional details of metal or compound in the powder or product
    • B22F2303/20—Coating by means of particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2303/00—Functional details of metal or compound in the powder or product
    • B22F2303/30—Coating alloy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/05—Submicron size particles
    • B22F2304/058—Particle size above 300 nm up to 1 micrometer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/15—Millimeter size particles, i.e. above 500 micrometer

Definitions

  • the present invention relates to a powder mixture of three different pre-alloyed metal based powders, intended to be used in surface coating of metal parts.
  • the powder mixture is deposited using e.g. laser cladding or plasma transfer arc welding (PTA), or thermal spray (e.g. HVOF).
  • PTA plasma transfer arc welding
  • HVOF thermal spray
  • the powder mixture is useful for reducing friction and improving wear reducing properties of the deposited coating. Such coatings may also improve machinability.
  • inclusions of manganese sulphide or tungsten sulphide in the pre-alloyed powder may be used.
  • Thermal surfacing i.e. thermal spray coating and overlay welding powder grades are widely used for coating of component surfaces against wear and corrosion.
  • Fe-, Ni- and Co- based grades are known to radically improve life time of wear- and/or corrosion exposed components.
  • high prices and limited availability of Ni and Co on the world market also calls for longer life time improvement.
  • development of new coating deposition methods like laser cladding, cold spraying and high velocity spraying open new possibilities for alloying, more accurate control of coating process and higher automation, thereby calling for additional types of powders.
  • One approach to improve friction and wear properties may be to incorporate solid lubricant to thermal surfacing grades so that the deposited coating includes friction and wear reducing substances while maintaining acceptable levels of corrosion resistance and hardness.
  • Solid lubricants are soft solid phase materials which are capable of reducing friction and wear between two surfaces sliding against each other without the need for a liquid media. Materials to be considered as solid lubricants need to meet at least the following criteria: adhere contacting surfaces - stickiness: low shear strength - low intrinsic friction; low hardness - low abrasivity and thermochemical stability for the intended environment. Examples of solid lubricants are; talc, graphite, manganese sulphide (MnS), molybdenum disulphide (MoS 2 ), or tungsten disulphide (WS 2 ). Use of solid lubricants may provide advantages in: stability at extremely low or high temperatures; stability in extreme environments, such as cold or hot environments, or environments having high radiation levels; mechanical design issues (lighter design, reduced critical velocity) or able to carry extreme loads.
  • Solid lubricants may have high friction coefficient compared to that of oil or grease; finite wear life for solid lubricant films when renewal is not possible; no or limited cooling capacity compared to oil or grease, or tendency to clogging caused by debris and residual particles.
  • MnS solid lubricant
  • the inventor of the present invention has now found that it may be advantageous to add each of the components of the solid lubricant to separate metal powders and then mixing the metal powders either concurrently with carrying out the surface coating procedure, or prior to carrying out the surface coating procedure.
  • three powders are mixed; one metal powder containing manganese or tungsten; one metal powder containing sulfur; and one iron based powder to enable proper ratios between the various components.
  • Mn, W, and S are pre-alloyed in their respective powder particles.
  • These three metal powders are then mixed together and used in a surface coating procedure, wherein the metal particles are melted, and MnS or WS inclusions are formed in the melt (also termed melt pool).
  • the slag cannot be easily removed from the top of the melt.
  • the slag is left on the top or sides of the surface coating, such as an overlay welding seam. If on the sides, the next seam will cover the slag and the slag will not have time enough to move to the seam top. Because of this, the microstructure of the resulting hard face includes both fine-dispersed MnS but also slag-MnS.
  • the powder mixture according to the present invention can be used in applications with high tolerance with regard to surface quality (such as surface finish, slag formation, or dimensional variability).
  • surface quality such as surface finish, slag formation, or dimensional variability.
  • the resulting hard face is thus suitable for use in heavy outdoor equipment, such as rails, wheels in rail- and tram-ways, mining-, agriculture-, oil-, gas-, and construction-tools.
  • the invention is a powder mixture containing
  • the invention is a powder mixture according to the above, wherein the ratio between the powders are such that the amount of MnS is 4-15%.
  • the invention is a metal powder according to the above, wherein the particle size of the prealloyed powder is from 45 ⁇ m to 200mm, or from 50-150 ⁇ m.
  • the invention is also a method for surface coating metal parts, by way of laser cladding or PTA (plasma transferred arc), with a metal powder according to the above, thereby producing a metal coated component.
  • PTA plasma transferred arc
  • solid lubricants such as MnS or WS are useful in the field of surface coating, whereby a hard phase is formed on the surface of a substrate.
  • MnS or WS function as a so-called solid lubricant.
  • the present inventor has shown that a mixture of metal powders can be used in a surface coating procedure, such as plasma transfer arc, and by choosing the right components in the individual metal powders, the solid lubricant can form in the resulting surface coating or hard phase.
  • the metal powders may be nickel, cobalt, or iron based.
  • Powder M may have the following composition; C, 0.05-0.5%; Si, 2.0-4.0%; B, 0.8-1.3%; Cr, 2-10%; Fe, 3-15%; Al, 0.3-0.5%; Mn, 5-15%; the balance being Ni.
  • the powder was prepared by atomisation of a melt containing the elements above in said amounts.
  • the resulting powder contains Mn as inclusions in a matrix of metal alloy.
  • Powder M This powder is herein denoted "Powder M”; Powder S may have the following composition; C, 0.05-0.2%; Si, 2.2-2.9%; B, 0.8-1.3%; Cr, 2.8-3.45%; Fe, 1.4-2.3%; Al, 0.3-0.5%; S, 3-13%; the balance being Ni.
  • the powder was prepared by atomisation of a melt containing the elements above in said amounts.
  • the resulting powder contains S as inclusions in a matrix of metal alloy.
  • This powder is herein denoted “Powder S”; and the third powder is 1540 - a standard grade.
  • This powder is herein denoted "Powder MP"
  • Powder S, Powder Mn and powder P are mixed, in order to achieve 4-15 % MnS in the final melt pool which forms in the below mentioned cladding methods.
  • This powder mixture is herein denoted "Mixture PM”.
  • the Mixture PM is especially well suited for weld cladding methods, such as laser cladding or PTA.
  • thermal spray e.g. flame spray, HVOF, HVAF, coldspray, plasma spray, and the like may also be suitable applications.
  • the prealloyed nickel, iron, or cobalt based powder is preferably produced by water or gas atomization of a melt which includes Mn, W, or S and other alloying elements chosen from the group consisting of C, Si, B, Cr, Fe, Al, Ni, Co, and V.
  • the particle size of the pre-alloyed powder alloy is typically from 10 ⁇ m to 800 ⁇ m, or from 10 ⁇ m to 200 ⁇ m, or preferably from 15-150 ⁇ m, or 50-150 ⁇ m.
  • the invention provides a method for surface coating metal parts, by way of deposition techniques such as laser cladding or PTA (plasma transferred arc); thermal spray methods such as HVOF (high velocity oxy fuel spray), HVAF (high velocity acetylene fuel spray) or plasma spray; or by slurry methods such as centrifugal casting, with the above mentioned metal powder.
  • deposition techniques such as laser cladding or PTA (plasma transferred arc); thermal spray methods such as HVOF (high velocity oxy fuel spray), HVAF (high velocity acetylene fuel spray) or plasma spray; or by slurry methods such as centrifugal casting, with the above mentioned metal powder.
  • the invention also provides metal parts produced by the above mentioned suitable for coating by the powder according to the invention for dry friction contacts in machinery, such as e.g. industrial valves, sheet metal forming (SMF) tools, transport rollers in iron works, paper knives, and glass moulds.
  • machinery such as e.g. industrial valves, sheet metal forming (SMF) tools, transport rollers in iron works, paper knives, and glass moulds.
  • SMF sheet metal forming
  • the resulting powder contains Mn as inclusions in a matrix of metal alloy. This powder is herein denoted "Powder M"
  • Pre-alloyed or pre-mixed powder was applied to test samples as follows; Powder A was deposited onto S235JRG (base structural steel) substrate plates by PTA (plasma transfer arc) with parameters set to allow for a dilution of 5-15%.
  • Powder S was spread by hand on substrate as a powder before fusing with the substrate. How was the powder fuwed?
  • Powder according to the invention was also applied to substrate by laser cladding.
  • the coating from Powder S appears to result in finer inclusion sizes of MnS than when applied by PTA
  • Block on ring wear testing was performed, and shows the beneficial effects of 3MA powder mix in a metal surface coating layer or clad.
  • the specimens were rectangular blocks 10x10x 50 mm where the base metal was commonly used low carbon structural steel (EN S235 JRG, ASTM A570 Gr.36) and the surface layer was at least 0.5 mm thick in the as finished measure.
  • the test surface had a ground finish with surface roughness of Ra 0.3-0.4 ⁇ m, prepared by grinding.
  • the counter rings ⁇ 60/R100x ⁇ 20x16 mm were made of UIC 900A rail steel.
  • the test was unlubricated i.e. dry, and the test samples were carefully cleaned and then degreased by ethanol prior to testing. The testing was performed as a wear mechanism mapping trial.
  • test normal load was 5 and 42 N what correspond 500 respective 1000 MPa in max. Hertzian contact pressure. Sliding velocity was 0.045, 0.13, 0.37, 1.1 and 2.9 m/s. The total sliding distance was 800 m. Results are shown in Figure 1 and Figure 2 for contact pressures of 500 respective 1000 MPa.
  • Figure 3 and Figure 4 illustrate microstructure of S-powder laser clad.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP17153509.9A 2017-01-27 2017-01-27 Nouveau mélange de poudre Withdrawn EP3354758A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17153509.9A EP3354758A1 (fr) 2017-01-27 2017-01-27 Nouveau mélange de poudre
PCT/EP2018/051935 WO2018138247A1 (fr) 2017-01-27 2018-01-26 Nouveau produit et son utilisation
US16/480,517 US20190388964A1 (en) 2017-01-27 2018-01-26 New product and use thereof
CN201880008470.9A CN110225986A (zh) 2017-01-27 2018-01-26 新产品及其用途

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17153509.9A EP3354758A1 (fr) 2017-01-27 2017-01-27 Nouveau mélange de poudre

Publications (1)

Publication Number Publication Date
EP3354758A1 true EP3354758A1 (fr) 2018-08-01

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EP17153509.9A Withdrawn EP3354758A1 (fr) 2017-01-27 2017-01-27 Nouveau mélange de poudre

Country Status (4)

Country Link
US (1) US20190388964A1 (fr)
EP (1) EP3354758A1 (fr)
CN (1) CN110225986A (fr)
WO (1) WO2018138247A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108611637A (zh) * 2018-08-15 2018-10-02 沈阳农业大学 一种金属易磨损件表面等离子熔覆方法
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys
WO2024102590A1 (fr) * 2022-11-08 2024-05-16 Amsted Rail Company, Inc. Procédé de formation d'une surface d'usure pour une roue d'un véhicule ferroviaire
US12076788B2 (en) 2019-05-03 2024-09-03 Oerlikon Metco (Us) Inc. Powder feedstock for wear resistant bulk welding configured to optimize manufacturability

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031278A (en) * 1975-08-18 1977-06-21 Eutectic Corporation High hardness flame spray nickel-base alloy coating material
DE3743167A1 (de) * 1987-12-19 1989-06-29 Spraytec Oberflaechentech Fuelldraht zum erzeugen von schmelz-verbundschichten
WO2012173611A1 (fr) * 2011-06-15 2012-12-20 Halliburton Energy Services, Inc. Torche d'injection interne de particules de métal dur grossières et compositions, systèmes et procédés associés
WO2014090922A2 (fr) 2012-12-14 2014-06-19 Höganäs Ab (Publ) Nouveau produit et son utilisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031278A (en) * 1975-08-18 1977-06-21 Eutectic Corporation High hardness flame spray nickel-base alloy coating material
DE3743167A1 (de) * 1987-12-19 1989-06-29 Spraytec Oberflaechentech Fuelldraht zum erzeugen von schmelz-verbundschichten
WO2012173611A1 (fr) * 2011-06-15 2012-12-20 Halliburton Energy Services, Inc. Torche d'injection interne de particules de métal dur grossières et compositions, systèmes et procédés associés
WO2014090922A2 (fr) 2012-12-14 2014-06-19 Höganäs Ab (Publ) Nouveau produit et son utilisation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
SKARVELIS ET AL., ASME J. TRIBOL., vol. 132, 2010, pages 031302 - 1,031302-8
SURF. & COAT. TECHN., vol. 203, 2009, pages 1384 - 1394
TRIB. INT., vol. 42, 2009, pages 1765 - 1770

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108611637A (zh) * 2018-08-15 2018-10-02 沈阳农业大学 一种金属易磨损件表面等离子熔覆方法
CN108611637B (zh) * 2018-08-15 2020-05-29 沈阳农业大学 一种农用秸秆切割刀表面等离子熔覆方法
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys
US12076788B2 (en) 2019-05-03 2024-09-03 Oerlikon Metco (Us) Inc. Powder feedstock for wear resistant bulk welding configured to optimize manufacturability
WO2024102590A1 (fr) * 2022-11-08 2024-05-16 Amsted Rail Company, Inc. Procédé de formation d'une surface d'usure pour une roue d'un véhicule ferroviaire

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Publication number Publication date
WO2018138247A1 (fr) 2018-08-02
CN110225986A (zh) 2019-09-10
US20190388964A1 (en) 2019-12-26

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