US20190061005A1 - High Quality Spherical Powders for Additive Manufacturing Processes Along With Methods of Their Formation - Google Patents

High Quality Spherical Powders for Additive Manufacturing Processes Along With Methods of Their Formation Download PDF

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Publication number
US20190061005A1
US20190061005A1 US15/962,216 US201815962216A US2019061005A1 US 20190061005 A1 US20190061005 A1 US 20190061005A1 US 201815962216 A US201815962216 A US 201815962216A US 2019061005 A1 US2019061005 A1 US 2019061005A1
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Prior art keywords
particles
feedstock
powder
treated
feedstock particles
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US15/962,216
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English (en)
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Rajendra Madhukar Kelkar
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General Electric Co
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General Electric Co
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Priority to US15/962,216 priority Critical patent/US20190061005A1/en
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KELKAR, RAJENDRA MADHUKAR
Priority to EP18849902.4A priority patent/EP3687720A4/fr
Priority to CA3071833A priority patent/CA3071833A1/fr
Priority to PCT/US2018/044089 priority patent/WO2019045923A1/fr
Priority to JP2020512563A priority patent/JP2020532650A/ja
Priority to CN201880055675.2A priority patent/CN111093866A/zh
Publication of US20190061005A1 publication Critical patent/US20190061005A1/en
Priority to JP2021169478A priority patent/JP2022023873A/ja
Priority to JP2023045898A priority patent/JP2023082045A/ja
Pending legal-status Critical Current

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    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F1/0014—
    • 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
    • B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
    • 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
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/065—Spherical 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/142—Thermal or thermo-mechanical treatment
    • 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
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/084—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid combination of methods
    • 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
    • B22F2202/00—Treatment under specific physical conditions
    • B22F2202/13—Use of plasma
    • 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
    • B22F2301/15—Nickel or cobalt
    • 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
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention generally relates to systems and methods for forming high quality spherical powders from a metallic powder feedstock.
  • the high quality spherical powders are particularly suitable for additively manufacturing an object or part.
  • Additive manufacturing processes generally involve the buildup of one or more materials to make a net or near net shape (NNS) object, in contrast to subtractive manufacturing methods.
  • NPS net or near net shape
  • additive manufacturing is an industry standard term, additive manufacturing encompasses various manufacturing and prototyping techniques known under a variety of additive manufacturing terms, including freeform fabrication, 3D printing, rapid prototyping/tooling, etc. Additive manufacturing techniques are capable of fabricating complex components from a wide variety of materials. Generally, a freestanding object can be fabricated from a computer aided design (CAD) model.
  • CAD computer aided design
  • a particular type of additive manufacturing process uses an energy beam, for example, an electron beam or electromagnetic radiation such as a laser beam, to sinter or melt a powder material, creating a solid three-dimensional object in which particles of the powder material are bonded together.
  • an energy beam for example, an electron beam or electromagnetic radiation such as a laser beam
  • Different material systems for example, engineering plastics, thermoplastic elastomers, metals, and ceramics are in use.
  • Laser sintering or melting is also a notable additive manufacturing process for rapid fabrication of functional prototypes and tools.
  • Applications include patterns for investment casting, metal molds for injection molding and die casting, and molds and cores for sand casting. Fabrication of prototype objects to enhance communication and testing of concepts during the design cycle are other common usages of additive manufacturing processes.
  • Laser sintering is a common industry term used to refer to producing three-dimensional (3D) objects by using a laser beam to sinter or melt a fine powder. More accurately, sintering entails fusing (agglomerating) particles of a powder at a temperature below the melting point of the powder material, whereas melting entails fully melting particles of a powder to form a solid homogeneous mass.
  • the physical processes associated with laser sintering or laser melting include heat transfer to a powder material and then either sintering or melting the powder material.
  • the physical and chemical characteristics of the powder material can impact the quality of the resulting object. That is, the properties of a component built through additive manufacturing depends on the metal powder itself, with higher quality powders (e.g., denser, cleaner, and more spherical) behaving more predictably and thus results in better parts. As such, high quality powder material is required for components formed from Additive Manufacturing techniques, particularly when used to manufacture components for gas turbine machinery and/or medical implant or devices applications.
  • Powder making methods from a metal source mainly (as there are other techniques like hydride/dihydride, ball milling, rotating electrode, plasma atomization etc.) include gas atomization and water atomization.
  • gas atomization techniques result in particles with a more spherical and consistent shape
  • water atomization techniques result in particles with an irregular shape.
  • an oxidized layer may form on the outside of the particles formed by water atomization techniques.
  • powders from gas atomization techniques are preferred for additive manufacturing over powders formed from water atomization techniques, since powders formed from gas atomization techniques are more regular in shape (e.g., more spherical) and have a limited oxidized layer thereon.
  • powders formed from gas atomization are much more expensive to produce than water atomization powders.
  • the cost of the resulting component formed from a gas atomized powder is high.
  • Methods are generally provided for forming a high-quality powder from a feedstock powder of feedstock particles having irregular shapes.
  • the method includes exposing the feedstock powder to a plasma field to form a treated powder of treated particles having a more spherical shape than the feedstock particles.
  • the feedstock particles Prior to the plasma field exposure, the feedstock particles have an oxidized layer thereon as a result from previous exposure to water. After exposure to the plasma field, the treated particles are substantially free from an oxidized layer.
  • the feedstock powder may be formed from water atomization, mechanical crushing or grinding, gas atomization, and/or plasma atomization.
  • the oxidized layer on the feedstock particles may be a result of exposure to water during a water atomization process that formed the feedstock particles, or from exposure to water vapor in the air during mechanical grinding.
  • the method may include introducing the feedstock powder into the plasma field such that the surface of the feedstock particles melts and/or evaporates to form the more spherical shape.
  • the plasma field includes a reducing component that reacts with the oxidized layer on the feedstock particles, such as hydrogen, carbon monoxide, or a mixture thereof.
  • a reducing component that reacts with the oxidized layer on the feedstock particles, such as hydrogen, carbon monoxide, or a mixture thereof.
  • the treated particles may have an average particle size that is less than an average particle size of the feedstock particles.
  • the treated particles may have an average particle size that is about 10% to about 90% of the average particle size of the feedstock particles.
  • the feedstock particles may be formed from a metal material, such as a pure metal, an iron alloy, an aluminum alloy, a nickel alloy, a chrome alloy, a nickel-based superalloy, an iron-based superalloy, a cobalt-based superalloy, or a mixture thereof.
  • particles an alloying element, such as carbon may be mixed with the feedstock particles within the plasma field.
  • the method of forming a high-quality powder may include: forming a feedstock powder via water atomization such that the feedstock powder includes feedstock particles having irregular shapes and have an oxidized layer thereon; and thereafter, exposing the feedstock powder to a plasma field to melt and/or evaporate the surface of the feedstock particles such that a treated powder of treated particles is formed having a more spherical shape than the feedstock particles.
  • the plasma field may include a reducing component (e.g., hydrogen, carbon monoxide, or a mixture thereof) that reacts with the oxidized layer on the feedstock particles such that the treated particles are substantially free from an oxidized layer.
  • the treated particles have an average particle size that is less than an average particle size of the feedstock particles.
  • the resulting treated powders comprising the treated particles are also generally provided herein, along with methods of additively manufacturing a component from such treated powders.
  • FIG. 1 shows an exemplary apparatus for plasma spheroidization of a powder material improving the properties of a powder material such that the improved powder material may be more suitable for additive manufacturing techniques;
  • FIG. 2A is a scanning electron microscope (SEM) image of an exemplary feedstock powder according to Example
  • FIG. 2B is a magnified SEM image of the exemplary feedstock powder of FIG. 2A ;
  • FIG. 3A is a SEM image of an exemplary spheroidized powder formed from the feedstock powder shown in FIGS. 2A and 2B prior to washing according to Example;
  • FIG. 3B is a magnified SEM image of the exemplary spheroidized powder of FIG. 3A ;
  • FIG. 4A is a SEM image of the exemplary spheroidized powder shown in FIGS. 3A and 3B after washing according to the Example;
  • FIG. 4B is a magnified SEM image of the exemplary washed, spheroidized powder of FIG. 4A .
  • first”, “second”, and “third” may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components.
  • upstream and downstream refer to the relative direction with respect to fluid flow in a fluid pathway.
  • upstream refers to the direction from which the fluid flows
  • downstream refers to the direction to which the fluid flows.
  • Methods are generally provided for creating higher quality powder materials (i.e., a treated powder) from a lower-quality powder source (i.e., a feedstock powder), along with apparatus to perform such methods and the resulting particles.
  • a powder formed from water atomization techniques and having irregular shapes is transformed into a higher quality powder.
  • treated particles of the treated powder may have a more spherical shape than the feedstock particles of the feedstock powder, which may be irregular, non-spherical in shape.
  • any oxidation layer present on the feedstock powder may be removed (e.g., through chemical reduction).
  • the treated powder may be substantially free from any oxidation layer on its surface.
  • the term “substantially free” means no more than an insignificant trace amount present and encompasses completely free (e.g., 0 molar % up to 0.01 molar %).
  • the treated powder is subjected to (e.g., exposed to) plasma spheroidization to produce the high quality powder.
  • FIG. 1 a diagram of a plasma spheroidization apparatus 10 is generally shown.
  • the feedstock powder 12 (composed of a plurality of feedstock particles 13 ) is generally introduced into a plasma chamber 14 , along with a working gas 16 (also referred to as the plasma gas, no matter its state of matter).
  • a plasma field 18 may be formed within the plasma chamber 14 through heating to a temperature sufficient to convert the plasma gas 16 from its gaseous state into its plasma state.
  • heating elements 20 may be included within the plasma chamber 14 , such as an induction coil.
  • the feedstock particles 13 may have an irregular shape (e.g., non-spherical) when introduced into the plasma chamber 14 .
  • the feedstock particles 13 have a maximum size of about 150 micrometers ( ⁇ m).
  • the feedstock particles 13 may have an average size of about 10 ⁇ m to about 150 ⁇ m (e.g., about 50 ⁇ m to about 100 ⁇ m).
  • the feedstock powder 12 may be any metal material.
  • the metal material may include, but is not limited to, pure metals, iron alloys, aluminum alloys, nickel alloys, chrome alloys, nickel-based superalloys, cobalt-based superalloys, iron-based superalloys, or mixtures thereof.
  • alloying elements may be mixed with the feedstock powder 12 prior to or during exposure to the plasma gas 16 .
  • the chemical composition of the resulting treated powder may be controlled.
  • carbon particles may be mixed with the feedstock particles within the plasma field.
  • the surface of the feedstock particles 13 melts or evaporates within a melting zone 22 that includes the plasma field 18 .
  • the feedstock particles 13 do not entirely melt and/or evaporate, but rather that the surfaces of the feedstock particles 13 are melted/softened so as to reshape into a more regular shape (e.g., more spherical) while having a smaller size.
  • a more regular shape e.g., more spherical
  • the working gas 16 (i.e., the plasma gas) includes a reducing gas, such as hydrogen, carbon monoxide, or a mixture thereof.
  • the reducing gas may react with any oxide layer on the surface of the feedstock particles 13 , which may be in the form of chromium oxide, iron oxide, etc.
  • Such a reducing gas may react with the oxide to remove it from the surface such that the resulting treated powder 24 (in the form of a plurality of the resulting treated particles 25 ) are substantially free from any oxide layer thereon.
  • the reducing component reduces any oxide layer on the surface of the feedstock particles such that the resulting treated particles are substantially free from any oxide layer thereon.
  • the size of the feedstock particles 13 may be decreased such that the resulting treated particles 25 have an average particle size that is less than an average particle size of the feedstock particles 13 .
  • the resulting treated particles 25 have an average particle size that is about 10% to about 90% of the average particle size of the feedstock particles 13 .
  • the treated particles 25 have a maximum size of about 150 ⁇ m (e.g., an average size of about 10 ⁇ m to about 150 ⁇ m).
  • the treated particles 25 have a maximum size of about 50 ⁇ m (e.g., an average size of about 10 ⁇ m to about 50 ⁇ m).
  • Such a technique can be used to recondition powders as well.
  • the plasma spheroidization of the feedstock powder 12 improves the properties of the feedstock powders 12 such that the improved powder material (i.e., the treated powder 24 ) may be more suitable for additive manufacturing techniques.
  • additive manufacturing techniques or processes refer generally to manufacturing processes wherein successive layers of material(s) are provided on each other to “build-up,” layer-by-layer, a three-dimensional component. The successive layers generally fuse together to form a monolithic component which may have a variety of integral sub-components.
  • additive manufacturing technology is described herein as enabling fabrication of complex objects by building objects point-by-point, layer-by-layer, typically in a vertical direction, other methods of fabrication are possible and within the scope of the present subject matter.
  • discussion herein refers to the addition of material to form successive layers, one skilled in the art will appreciate that the methods and structures disclosed herein may be practiced with any additive manufacturing technique or manufacturing technology.
  • embodiments of the present invention may use layer-additive processes, layer-subtractive processes, or hybrid processes.
  • Suitable additive manufacturing techniques in accordance with the present disclosure include, for example, Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS), 3D printing such as by inkjets, laser jets, and binder jets, Sterolithography (SLA), Direct Selective Laser Sintering (DSLS), Electron Beam Sintering (EBS), Electron Beam Melting (EBM), Laser Engineered Net Shaping (LENS), Laser Net Shape Manufacturing (LNSM), Direct Metal Deposition (DMD), Digital Light Processing (DLP), Direct Selective Laser Melting (DSLM), Selective Laser Melting (SLM), Direct Metal Laser Melting (DMLM), and other known processes.
  • FDM Fused Deposition Modeling
  • SLS Selective Laser Sintering
  • 3D printing such as by inkjets, laser jets, and binder jets
  • SLA Sterolithography
  • DSLS Direct Selective Laser Sintering
  • EBS Electron Beam Sintering
  • EBM Electron Beam Melting
  • the additive manufacturing processes described herein may be used for forming components using any suitable material.
  • the material may be plastic, metal, concrete, ceramic, polymer, epoxy, photopolymer resin, or any other suitable material that may be in solid, liquid, powder, sheet material, wire, or any other suitable form or combinations thereof.
  • the additively manufactured components described herein may be formed in part, in whole, or in some combination of materials including but not limited to pure metals, iron alloys, aluminum alloys, nickel alloys, chrome alloys, and nickel-based, iron-based, or cobalt-based superalloys (e.g., those available under the name Inconel® available from Special Metals Corporation). These materials are examples of materials suitable for use in the additive manufacturing processes described herein, and may be generally referred to as “additive materials.”
  • references to “fusing” may refer to any suitable process for creating a bonded layer of any of the above materials.
  • fusing may refer to creating a thermoset bond between polymer materials.
  • the bond may be formed by a crosslinking process.
  • the material is ceramic, the bond may be formed by a sintering process.
  • the material is powdered metal, the bond may be formed by a melting or sintering process.
  • the additive manufacturing process disclosed herein allows a single component to be formed from multiple materials.
  • the components described herein may be formed from any suitable mixtures of the above materials.
  • a component may include multiple layers, segments, or parts that are formed using different materials, processes, and/or on different additive manufacturing machines.
  • components may be constructed which have different materials and material properties for meeting the demands of any particular application.
  • the components described herein are constructed entirely by additive manufacturing processes, it should be appreciated that in alternate embodiments, all or a portion of these components may be formed via casting, machining, and/or any other suitable manufacturing process. Indeed, any suitable combination of materials and manufacturing methods may be used to form these components.
  • Additive manufacturing processes fabricate components using three-dimensional (3D) information, for example a three-dimensional computer model, of the component.
  • 3D three-dimensional
  • a three-dimensional design model of the component may be defined prior to manufacturing.
  • a model or prototype of the component may be scanned to determine the three-dimensional information of the component.
  • a model of the component may be constructed using a suitable computer aided design (CAD) program to define the three-dimensional design model of the component.
  • CAD computer aided design
  • the design model may include 3D numeric coordinates of the entire configuration of the component including both external and internal surfaces of the component.
  • the design model may define the body, the surface, and/or internal passageways such as openings, support structures, etc.
  • the three-dimensional design model is converted into a plurality of slices or segments, e.g., along a central (e.g., vertical) axis of the component or any other suitable axis.
  • Each slice may define a thin cross section of the component for a predetermined height of the slice.
  • the successive cross-sectional slices together form the 3D component.
  • the component is then “built-up” slice-by-slice, or layer-by-layer, until finished.
  • the components described herein may be fabricated using the additive process, or more specifically each layer is successively formed, e.g., by fusing or polymerizing a plastic using laser energy or heat or by sintering or melting metal powder.
  • a particular type of additive manufacturing process may use an energy beam, for example, an electron beam or electromagnetic radiation such as a laser beam, to sinter or melt a powder material.
  • Any suitable laser and laser parameters may be used, including considerations with respect to power, laser beam spot size, and scanning velocity.
  • the build material may be formed by any suitable powder or material selected for enhanced strength, durability, and useful life, particularly at high temperatures.
  • Each successive layer may be, for example, between about 10 ⁇ m and 200 ⁇ m, although the thickness may be selected based on any number of parameters and may be any suitable size according to alternative embodiments. Therefore, utilizing the additive formation methods described above, the components described herein may have cross sections as thin as one thickness of an associated powder layer, e.g., 10 ⁇ m, utilized during the additive formation process.
  • the surface finish and features of the components may vary as need depending on the application.
  • the surface finish may be adjusted (e.g., made smoother or rougher) by selecting appropriate laser scan parameters (e.g., laser power, scan speed, laser focal spot size, etc.) during the additive process, especially in the periphery of a cross-sectional layer which corresponds to the part surface.
  • laser scan parameters e.g., laser power, scan speed, laser focal spot size, etc.
  • a rougher finish may be achieved by increasing laser scan speed or decreasing the size of the melt pool formed
  • a smoother finish may be achieved by decreasing laser scan speed or increasing the size of the melt pool formed.
  • the scanning pattern and/or laser power can also be changed to change the surface finish in a selected area.
  • multi-part components may be formed as a single piece of continuous metal, and may thus include fewer sub-components and/or joints compared to prior designs.
  • the integral formation of these multi-part components through additive manufacturing may advantageously improve the overall assembly process. For example, the integral formation reduces the number of separate parts that must be assembled, thus reducing associated time and overall assembly costs. Additionally, existing issues with, for example, leakage, joint quality between separate parts, and overall performance may advantageously be reduced.
  • the additive manufacturing methods described above enable much more complex and intricate shapes and contours of the components described herein.
  • such components may include thin additively manufactured layers and unique fluid passageways with integral mounting features.
  • the additive manufacturing process enables the manufacture of a single component having different materials such that different portions of the component may exhibit different performance characteristics.
  • the successive, additive nature of the manufacturing process enables the construction of these novel features.
  • the components described herein may exhibit improved functionality and reliability.
  • water atomized powder was purchased from under their designation 316 powder, which had the sizing of ⁇ 325 mesh/15 microns.
  • This water atomized powder is an iron-based alloy.
  • the water atomized powder was found to have an apparent density of 2.75 (g/cm 3 ) with an oxygen content of 0.164% (by wt.), nitrogen content of 0.047% (wt %), and hydrogen content of 0.001% (by wt. %).
  • the water atomized powder was found to have the particle size distribution shown in Table 1 prior to any treatment performed.
  • FIGS. 2A and 2B show SEM images of the water atomized powder prior to any treatment performed. As shown, the water atomized powder includes particles of varying size and shape.
  • the water atomized powder was spheroidized using argon as a primary gas, with hydrogen as a secondary gas.
  • Other experiments were also performed using helium and nitrogen as a secondary gas, with argon being the primary gas. It was found that the spheroidization resulted in a more uniform size and shape of the particles in the powder.
  • FIGS. 3A and 3B shown images of the spheroidized powder after spheroidized using argon as a primary gas and hydrogen as a secondary gas.
  • FIGS. 4A and 4B show images of the spheroidized powder. As seen, relatively clean and uniform particles make up the powder following this spheroidization and washing process.
  • the spheroidized powder was found to have an oxygen content of 0.057% (wt %), nitrogen content of 0.009% (wt %), and hydrogen content of 0.0007% (wt %). Thus, the spheroidized powder had significantly reduced contents of oxygen, nitrogen, and hydrogen.
  • Table 2 shows the particle size distribution after spheroidization and washing.

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US15/962,216 US20190061005A1 (en) 2017-08-30 2018-04-25 High Quality Spherical Powders for Additive Manufacturing Processes Along With Methods of Their Formation
EP18849902.4A EP3687720A4 (fr) 2017-08-30 2018-07-27 Poudres sphériques de haute qualité pour procédés de fabrication additive ainsi que leurs procédés de formation
CA3071833A CA3071833A1 (fr) 2017-08-30 2018-07-27 Poudres spheriques de haute qualite pour procedes de fabrication additive ainsi que leurs procedes de formation
PCT/US2018/044089 WO2019045923A1 (fr) 2017-08-30 2018-07-27 Poudres sphériques de haute qualité pour procédés de fabrication additive ainsi que leurs procédés de formation
JP2020512563A JP2020532650A (ja) 2017-08-30 2018-07-27 付加製造プロセス用の高品質球状粉末及びその形成方法
CN201880055675.2A CN111093866A (zh) 2017-08-30 2018-07-27 用于增材制造工艺的高质量球形粉末及其形成方法
JP2021169478A JP2022023873A (ja) 2017-08-30 2021-10-15 付加製造プロセス用の高品質球状粉末及びその形成方法
JP2023045898A JP2023082045A (ja) 2017-08-30 2023-03-22 付加製造プロセス用の高品質球状粉末及びその形成方法

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021127132A1 (fr) * 2019-12-19 2021-06-24 6K Inc. Procédé de production de poudre sphéroïdisée à partir de produits de charge
US11273491B2 (en) * 2018-06-19 2022-03-15 6K Inc. Process for producing spheroidized powder from feedstock materials
US11311938B2 (en) 2019-04-30 2022-04-26 6K Inc. Mechanically alloyed powder feedstock
CN115007851A (zh) * 2022-06-20 2022-09-06 华材(山东)新材料有限公司 一种一步法生产3d打印用超细球形钌粉的装置及方法
US11577314B2 (en) 2015-12-16 2023-02-14 6K Inc. Spheroidal titanium metallic powders with custom microstructures
US11611130B2 (en) 2019-04-30 2023-03-21 6K Inc. Lithium lanthanum zirconium oxide (LLZO) powder
US11717886B2 (en) 2019-11-18 2023-08-08 6K Inc. Unique feedstocks for spherical powders and methods of manufacturing
CN117001004A (zh) * 2023-09-28 2023-11-07 西安赛隆增材技术股份有限公司 一种微波等离子制粉装置及制粉方法
US11839919B2 (en) 2015-12-16 2023-12-12 6K Inc. Spheroidal dehydrogenated metals and metal alloy particles
US11855278B2 (en) 2020-06-25 2023-12-26 6K, Inc. Microcomposite alloy structure
US11919071B2 (en) 2020-10-30 2024-03-05 6K Inc. Systems and methods for synthesis of spheroidized metal powders
US11963287B2 (en) 2020-09-24 2024-04-16 6K Inc. Systems, devices, and methods for starting plasma

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113134605B (zh) * 2021-04-19 2023-01-17 山东理工大学 等离子球化脱氧3d打印金属粉体制备方法
CN113134617B (zh) * 2021-04-19 2023-01-17 山东理工大学 等离子球化脱氧3d打印金属粉体制备装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003032693A1 (fr) * 2001-10-05 2003-04-17 Universite De Sherbrooke Chalumeau a plasma par induction multi-bobine pour alimentation de puissance integree
JP2003168594A (ja) * 2001-11-29 2003-06-13 High Frequency Heattreat Co Ltd 高周波熱プラズマ装置
US20100314788A1 (en) * 2006-08-18 2010-12-16 Cheng-Hung Hung Production of Ultrafine Particles in a Plasma System Having Controlled Pressure Zones

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808217A (en) * 1988-05-23 1989-02-28 Gte Products Corporation Process for producing fine spherical particles having a low oxygen content
JP2702796B2 (ja) * 1990-02-23 1998-01-26 旭化成工業株式会社 銀合金導電性ペースト
US5294242A (en) * 1991-09-30 1994-03-15 Air Products And Chemicals Method for making metal powders
JP2001320097A (ja) * 2000-05-09 2001-11-16 Komatsu Ltd 熱電素子とその製造方法及びこれを用いた熱電モジュール
US6689192B1 (en) * 2001-12-13 2004-02-10 The Regents Of The University Of California Method for producing metallic nanoparticles
WO2003095130A1 (fr) * 2002-05-08 2003-11-20 Dana Corporation Frittage assiste par plasma
US6911618B1 (en) * 2004-02-03 2005-06-28 Hitachi Metals, Ltd. Method of producing minute metal balls
JP4609763B2 (ja) * 2004-10-15 2011-01-12 日立金属株式会社 低酸素金属粉末の製造方法
US7662253B2 (en) * 2005-09-27 2010-02-16 Lam Research Corporation Apparatus for the removal of a metal oxide from a substrate and methods therefor
WO2015174949A1 (fr) * 2014-05-14 2015-11-19 Amastan Technologies Llc Procédé pour la densification et la sphéroïdisation de gouttelettes de précurseur solide et de solution de matériaux à l'aide d'un plasma
GB2543058B (en) * 2015-10-06 2022-04-06 Wallwork Cambridge Ltd Smoothing the surface finish of rough metal articles
JP6797642B2 (ja) * 2015-12-10 2020-12-09 キヤノン株式会社 原料粉体の処理方法、および三次元造形物の製造方法
TWI692382B (zh) * 2016-01-27 2020-05-01 史達克公司 高熵合金絲及多主元合金絲，及其預形成物、製造方法和應用
CN105689728B (zh) * 2016-02-16 2018-10-23 连云港倍特超微粉有限公司 一种生产3d打印用金属合金球形粉体的装置及其方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003032693A1 (fr) * 2001-10-05 2003-04-17 Universite De Sherbrooke Chalumeau a plasma par induction multi-bobine pour alimentation de puissance integree
JP2003168594A (ja) * 2001-11-29 2003-06-13 High Frequency Heattreat Co Ltd 高周波熱プラズマ装置
US20100314788A1 (en) * 2006-08-18 2010-12-16 Cheng-Hung Hung Production of Ultrafine Particles in a Plasma System Having Controlled Pressure Zones

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11577314B2 (en) 2015-12-16 2023-02-14 6K Inc. Spheroidal titanium metallic powders with custom microstructures
US11839919B2 (en) 2015-12-16 2023-12-12 6K Inc. Spheroidal dehydrogenated metals and metal alloy particles
US11465201B2 (en) 2018-06-19 2022-10-11 6K Inc. Process for producing spheroidized powder from feedstock materials
US11471941B2 (en) 2018-06-19 2022-10-18 6K Inc. Process for producing spheroidized powder from feedstock materials
US11273491B2 (en) * 2018-06-19 2022-03-15 6K Inc. Process for producing spheroidized powder from feedstock materials
US11311938B2 (en) 2019-04-30 2022-04-26 6K Inc. Mechanically alloyed powder feedstock
US11611130B2 (en) 2019-04-30 2023-03-21 6K Inc. Lithium lanthanum zirconium oxide (LLZO) powder
US11633785B2 (en) 2019-04-30 2023-04-25 6K Inc. Mechanically alloyed powder feedstock
US11717886B2 (en) 2019-11-18 2023-08-08 6K Inc. Unique feedstocks for spherical powders and methods of manufacturing
US11590568B2 (en) 2019-12-19 2023-02-28 6K Inc. Process for producing spheroidized powder from feedstock materials
WO2021127132A1 (fr) * 2019-12-19 2021-06-24 6K Inc. Procédé de production de poudre sphéroïdisée à partir de produits de charge
JP2023507593A (ja) * 2019-12-19 2023-02-24 シックスケー インコーポレイテッド 原材料から球状化粉末を製造する方法
KR20220115568A (ko) * 2019-12-19 2022-08-17 6케이 인크. 공급원료 물질로부터 구상화 분말을 생산하는 공정
JP7392156B2 (ja) 2019-12-19 2023-12-05 シックスケー インコーポレイテッド 原材料から球状化粉末を製造する方法
KR102639133B1 (ko) * 2019-12-19 2024-02-23 6케이 인크. 공급원료 물질로부터 구상화 분말을 생산하는 공정
US11855278B2 (en) 2020-06-25 2023-12-26 6K, Inc. Microcomposite alloy structure
US11963287B2 (en) 2020-09-24 2024-04-16 6K Inc. Systems, devices, and methods for starting plasma
US11919071B2 (en) 2020-10-30 2024-03-05 6K Inc. Systems and methods for synthesis of spheroidized metal powders
CN115007851A (zh) * 2022-06-20 2022-09-06 华材(山东)新材料有限公司 一种一步法生产3d打印用超细球形钌粉的装置及方法
CN117001004A (zh) * 2023-09-28 2023-11-07 西安赛隆增材技术股份有限公司 一种微波等离子制粉装置及制粉方法

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