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EP1518622A1 - Procédé pour la préparation de granulats contenant de matière dure - Google Patents

Procédé pour la préparation de granulats contenant de matière dure Download PDF

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Publication number
EP1518622A1
EP1518622A1 EP04405536A EP04405536A EP1518622A1 EP 1518622 A1 EP1518622 A1 EP 1518622A1 EP 04405536 A EP04405536 A EP 04405536A EP 04405536 A EP04405536 A EP 04405536A EP 1518622 A1 EP1518622 A1 EP 1518622A1
Authority
EP
European Patent Office
Prior art keywords
binder
hard material
particles
spray
powder
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Withdrawn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
EP04405536A
Other languages
German (de)
English (en)
Inventor
Andreas Franz-Josef Dr. Kaiser
Peter Dr. Ernst
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.)
Oerlikon Metco US Inc
Original Assignee
Sulzer Metco US Inc
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 Sulzer Metco US Inc filed Critical Sulzer Metco US Inc
Priority to EP04405536A priority Critical patent/EP1518622A1/fr
Publication of EP1518622A1 publication Critical patent/EP1518622A1/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Withdrawn legal-status Critical Current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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • 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
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • B22F1/14—Treatment of metallic powder
    • B22F1/148—Agglomerating
    • 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
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the invention relates to a method for producing a hard material containing granules and a produced by the method Spray powder usable for a thermal spray method.
  • Hard metals such as WC / Co are particle composites, in which particles of a hard material (e.g., tungsten carbide WC) in one of Binding metal existing matrix (e.g., cobalt Co) are embedded.
  • a hard material e.g., tungsten carbide WC
  • Binding metal existing matrix e.g., cobalt Co
  • Another hard material is, for example, silicon carbide SiC, another Binding metal nickel Ni or a Co-Ni alloy.
  • thermal Spraying can be produced carbide coatings, the Carbide granular is used as a spray powder.
  • the particles of the hard material, the binding metal in the form of a fine powder and a liquid generates a slip-like mixture. The mixture is dried in a special granulation and to a flowable granules molded.
  • the deposition efficiency namely the percentage of deposited granules, depends on the quality of the spray powder: the greater the density of the granules, the higher the deposition efficiency. This also applies to the bulk density of the granules. In the case of the stated granulation method, the bulk density of the WC / Co powder is less than 3.6 g / cm 3 ; and the deposition efficiency is below 60%.
  • the object of the invention is to provide a method for producing a granulate containing hard material, for which the deposition efficiency in a thermal spraying process is greater than 60%.
  • the bulk density of WC / Co granules, which can be prepared by this method should be at least 3.7 g / cm 3 . This object is achieved by the method defined in claim 1.
  • inventive method - see Figures 1 and 2 - comprises steps a) to f) corresponding to the blocks a to f in Fig. 1:
  • step a) particles 1 of a hard material H with a powder of a Bindemetalls M mixed.
  • the metal M is suitable to a the Hard material particles 1 connecting matrix 2 produce.
  • This matrix 2 yields in a calcination in which the powder of the binding metal M sinters.
  • step b) at least one of the solids mixture of step a) Sintering auxiliaries admixed.
  • Sintering aids are additives A through which the Sintering temperature is lowered by a few Kelvin and / or the compression of a spray granulate is increased. This step b) can be carried out with the step a) be combined.
  • step c) the solid mixture with a liquid L to a Slurry ("slurry") slurried. It will be at least one at the same time Dispersant D and B binder added. The proportion of liquid L in Slip is reduced to a necessary minimum; at this minimum is the method of the subsequent step d) just still feasible.
  • This step c) can be combined with step b), wherein the step b) can already include step a).
  • step d) the slurry is converted into a granular form by spray drying brought.
  • the liquid L is largely of the solids H, M separated.
  • Spray-drying is carried out so that the solids H, M agglomerate into bodies 3, which due to the binder or the binder a form stable spray granules G.
  • the granules 3 of this Intermediate G each contain a plurality of hard material particles.
  • step e) the spray granules G are calcined by placing them in an oven and for example, as a bed in graphite crucibles such Process conditions (temperature, residence time) is suspended, in which the sintering between the solids H, M sets.
  • Process conditions temperature, residence time
  • sintering forms the binding metal M within the body 3
  • the density of the corpuscles 3 increases, so they at least 10% compared to uncalcined spray granules G is bigger. Calcining results in a composite of the corpuscles 3, although the compounds of the composite much weaker than those within the bodies 3 are.
  • step f) becomes from the composite of the calcined body 3 a granulated or powdered product P by the use of a generated mechanical action, this action with advantage a crushing process is applied.
  • Classification for example sieving, is a granule or powder with a predetermined grain size distribution produced.
  • a cemented carbide powder is precipitated the hard material tungsten carbide WC and the binder metal cobalt Co or make a Co alloy.
  • another hard material could be Silicon carbide SiC; other examples of the binder metal are nickel Ni or a Co-Ni alloy.
  • Spray drying can be done with a commercial standard two-nozzle system perform hot air with a pressure of for example 2 bar and at a temperature of 250 ° C. used for drying and granulating the slurry. It can for example, 1 kg of slip per minute are treated.
  • the Calcining the spray granules is in a hydrogen atmosphere at a temperature in a range of 1050 to 1300 ° C, preferably at around 1250 ° C performed.
  • the simplified drawn granules 3 shown in Fig. 2 has been made of WC and Co.
  • the indicated by a punctation matrix 2 in reality in addition to the binder metal M also includes a variety of pores, not shown.
  • the porosity given by these pores depends on how much liquid L the slurry has been made (in the example described, L is water, it could also be an organic solvent).
  • L is water, it could also be an organic solvent.
  • a slurry with a relatively large amount of liquid L a larger, undesirable cavity forms in a central region of the body 3, due to which the mean density of the body 3 is smaller than desired.
  • the occurrence of the central cavity can be prevented. This is the case for the body 3 shown in FIG.
  • the bulk density of uncalcined WC / Co granules therefore assumes the desired value of at least 3.0 g / cm 3 . When calcining, this value increases to at least 3.7 g / cm 3 .
  • a solid which is in powder form can be used the solid mixture of step a) is added.
  • Sintering aid may be added to the batch dissolved in a solvent become.
  • the solvent may be water, which is liquid L is used in slurrying the slurry.
  • the solvent can but also a second liquid, advantageously before Slurry with water by drying - without forming a Spray granules - is removed.
  • the proportion of the sintering aid has a value in the range 10 - 10000 ppm, preferably 100 - 1000 ppm.
  • the above-mentioned sintering aids can also in a other process step, e.g. before the Schlickerher ein the co-metal of WC / Co mixture to be added.
  • Sintering aids may include metals, e.g. Cu are added, whose Alloy with Co lower the melting point of the alloy; or it will promoted the wetting of the WC particles with the Co during calcining.
  • the spray powder prepared according to the invention from WC / Co has a Co content in the solids mixture of process step a) in the range from 10 to 20% by weight.
  • the bulk density of the powdery or granular product P is at least 3.7 g / cm 3 .
  • a powder produced by means of classification, for example sieving has a predetermined grain size distribution, as is customary for a typical spray powder, with grain sizes of between about 5 and 100 ⁇ m, for example.

Landscapes

  • 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)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP04405536A 2003-09-26 2004-08-27 Procédé pour la préparation de granulats contenant de matière dure Withdrawn EP1518622A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405536A EP1518622A1 (fr) 2003-09-26 2004-08-27 Procédé pour la préparation de granulats contenant de matière dure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405701 2003-09-26
EP03405701 2003-09-26
EP04405536A EP1518622A1 (fr) 2003-09-26 2004-08-27 Procédé pour la préparation de granulats contenant de matière dure

Publications (1)

Publication Number Publication Date
EP1518622A1 true EP1518622A1 (fr) 2005-03-30

Family

ID=34196171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405536A Withdrawn EP1518622A1 (fr) 2003-09-26 2004-08-27 Procédé pour la préparation de granulats contenant de matière dure

Country Status (1)

Country Link
EP (1) EP1518622A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006104737A3 (fr) * 2005-03-28 2007-09-20 Sulzer Metco Venture Llc Composition de charge de revetement de pulverisation thermique
EP1980645A1 (fr) * 2007-04-13 2008-10-15 Ralf Stein Procédé d'application d'un revêtement multicouche sur des pièces à usiner et/ou matières actives
WO2008125606A1 (fr) * 2007-04-13 2008-10-23 Ralf Stein Procédé d'application d'un revêtement multicouche sur des pièces à usiner et/ou des matériaux
US7799388B2 (en) 2006-05-26 2010-09-21 Sulzer Metco Venture, Llc Mechanical seals and method of manufacture
EP2141256A4 (fr) * 2007-04-06 2011-10-05 Sanyo Special Steel Co Ltd Matériau pour surface de revêtement d'un élément de bain de galvanisation par trempage à chaud, procédé pour produire le matériau et élément de bain de galvanisation par trempage à chaud
US8206792B2 (en) 2006-03-20 2012-06-26 Sulzer Metco (Us) Inc. Method for forming ceramic containing composite structure
WO2013041373A3 (fr) * 2011-09-21 2013-09-06 Durum Verschleißschutz GmbH Poudre de substance dure et procédé de fabrication d'une poudre de substance dure
CN108356260A (zh) * 2018-04-04 2018-08-03 北京工业大学 一种硬质合金异形制品的3d打印制造方法
CN109249027A (zh) * 2018-08-22 2019-01-22 株洲欧科亿数控精密刀具股份有限公司 一种层状结构的硬质合金数控刀片及其制备方法
DE102017125734A1 (de) * 2017-11-03 2019-05-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Gesintertes Hartmetallgranulat und seine Verwendung
CN113441709A (zh) * 2021-04-25 2021-09-28 横店集团东磁股份有限公司 一种适合高比重钨合金粉末喷雾制粒的成型剂及其制备方法和应用
GB2573445B (en) * 2017-02-20 2022-01-26 Kennametal Inc Cemented carbide powders for additive manufacturing
CN114085562A (zh) * 2021-12-17 2022-02-25 武汉苏泊尔炊具有限公司 防腐蚀材料、其制备方法以及由其形成的防腐蚀涂层
CN115156541A (zh) * 2022-05-13 2022-10-11 北京工业大学 一种高性能叠层结构硬质合金的制备方法
US11986974B2 (en) 2019-03-25 2024-05-21 Kennametal Inc. Additive manufacturing techniques and applications thereof
US11998987B2 (en) 2017-12-05 2024-06-04 Kennametal Inc. Additive manufacturing techniques and applications thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6089557A (ja) 1983-10-20 1985-05-20 Showa Denko Kk 溶射用粉末材料およびその製造方法
EP0657237A1 (fr) 1993-12-08 1995-06-14 Sulzer Metco (Westbury), Inc. Poudre pour pulvérisation thermique à base de carbure de tungstène et de carbure de chrome
EP1126043A1 (fr) * 2000-02-17 2001-08-22 Fujimi Incorporated Poudre de pulvérisation, procédé de projection thermique et revêtement par pulvérisation
EP1153652A1 (fr) 2000-05-09 2001-11-14 Sandvik Aktiebolag Préparation de suspensions bien dispersées pour le sèchage par atomisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6089557A (ja) 1983-10-20 1985-05-20 Showa Denko Kk 溶射用粉末材料およびその製造方法
EP0657237A1 (fr) 1993-12-08 1995-06-14 Sulzer Metco (Westbury), Inc. Poudre pour pulvérisation thermique à base de carbure de tungstène et de carbure de chrome
EP1126043A1 (fr) * 2000-02-17 2001-08-22 Fujimi Incorporated Poudre de pulvérisation, procédé de projection thermique et revêtement par pulvérisation
EP1153652A1 (fr) 2000-05-09 2001-11-14 Sandvik Aktiebolag Préparation de suspensions bien dispersées pour le sèchage par atomisation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198526, Derwent World Patents Index; Class L02, AN 1985-156965, XP002272991 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006104737A3 (fr) * 2005-03-28 2007-09-20 Sulzer Metco Venture Llc Composition de charge de revetement de pulverisation thermique
US7799111B2 (en) 2005-03-28 2010-09-21 Sulzer Metco Venture Llc Thermal spray feedstock composition
US8206792B2 (en) 2006-03-20 2012-06-26 Sulzer Metco (Us) Inc. Method for forming ceramic containing composite structure
US7799388B2 (en) 2006-05-26 2010-09-21 Sulzer Metco Venture, Llc Mechanical seals and method of manufacture
EP2141256A4 (fr) * 2007-04-06 2011-10-05 Sanyo Special Steel Co Ltd Matériau pour surface de revêtement d'un élément de bain de galvanisation par trempage à chaud, procédé pour produire le matériau et élément de bain de galvanisation par trempage à chaud
EP1980645A1 (fr) * 2007-04-13 2008-10-15 Ralf Stein Procédé d'application d'un revêtement multicouche sur des pièces à usiner et/ou matières actives
WO2008125606A1 (fr) * 2007-04-13 2008-10-23 Ralf Stein Procédé d'application d'un revêtement multicouche sur des pièces à usiner et/ou des matériaux
WO2013041373A3 (fr) * 2011-09-21 2013-09-06 Durum Verschleißschutz GmbH Poudre de substance dure et procédé de fabrication d'une poudre de substance dure
GB2573445B (en) * 2017-02-20 2022-01-26 Kennametal Inc Cemented carbide powders for additive manufacturing
DE102017125734A1 (de) * 2017-11-03 2019-05-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Gesintertes Hartmetallgranulat und seine Verwendung
US11998987B2 (en) 2017-12-05 2024-06-04 Kennametal Inc. Additive manufacturing techniques and applications thereof
CN108356260A (zh) * 2018-04-04 2018-08-03 北京工业大学 一种硬质合金异形制品的3d打印制造方法
CN109249027A (zh) * 2018-08-22 2019-01-22 株洲欧科亿数控精密刀具股份有限公司 一种层状结构的硬质合金数控刀片及其制备方法
US11986974B2 (en) 2019-03-25 2024-05-21 Kennametal Inc. Additive manufacturing techniques and applications thereof
CN113441709A (zh) * 2021-04-25 2021-09-28 横店集团东磁股份有限公司 一种适合高比重钨合金粉末喷雾制粒的成型剂及其制备方法和应用
CN114085562A (zh) * 2021-12-17 2022-02-25 武汉苏泊尔炊具有限公司 防腐蚀材料、其制备方法以及由其形成的防腐蚀涂层
CN114085562B (zh) * 2021-12-17 2022-11-29 武汉苏泊尔炊具有限公司 防腐蚀材料、其制备方法以及由其形成的防腐蚀涂层
CN115156541A (zh) * 2022-05-13 2022-10-11 北京工业大学 一种高性能叠层结构硬质合金的制备方法
CN115156541B (zh) * 2022-05-13 2023-06-09 北京工业大学 一种高性能叠层结构硬质合金的制备方法

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