WO1986003700A1 - Procede de fabrication de granules metalliques spheroidaux - Google Patents

Procede de fabrication de granules metalliques spheroidaux Download PDF

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Publication number
WO1986003700A1
WO1986003700A1 PCT/JP1984/000613 JP8400613W WO8603700A1 WO 1986003700 A1 WO1986003700 A1 WO 1986003700A1 JP 8400613 W JP8400613 W JP 8400613W WO 8603700 A1 WO8603700 A1 WO 8603700A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal
molten metal
alloy
oil
nozzle
Prior art date
Application number
PCT/JP1984/000613
Other languages
English (en)
Japanese (ja)
Inventor
Ritsue Yabuki
Junya Ohe
Original Assignee
Mitsubishi Kinzoku Kabushiki Kaisha
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
Priority claimed from JP58221896A external-priority patent/JPS60114508A/ja
Application filed by Mitsubishi Kinzoku Kabushiki Kaisha filed Critical Mitsubishi Kinzoku Kabushiki Kaisha
Priority to KR1019850700001A priority Critical patent/KR900007962B1/ko
Priority to PCT/JP1984/000613 priority patent/WO1986003700A1/fr
Publication of WO1986003700A1 publication Critical patent/WO1986003700A1/fr
Priority to SE8603557A priority patent/SE8603557L/xx

Links

Classifications

    • 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
    • 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
    • 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
    • B22F2009/086—Cooling after atomisation
    • B22F2009/0864—Cooling after atomisation by oil, other non-aqueous fluid or fluid-bed cooling

Definitions

  • the present invention relates to a method for producing spherical metal particles (including alloys) having regular dimensions.
  • a cemented carbide tip (made of WC-Co sintered alloy) is brazed or a Co-based surface hardening alloy [eg Statorite 3 ⁇ 4 1 (Co-30 wt 3 ⁇ 4 Cr-1 12 wt ⁇ W-2.5 wt C!] Etc. are hand-welded with oxygen-acetylene gas (hereinafter referred to as "gas-welded JT welding"), It has generally been the case that it is hard-cured.
  • gas-welded JT welding oxygen-acetylene gas
  • the exhaust pallets and intake pulp shaft ends of gasoline engines and diesel engines require particularly wear resistance because they are struck by the mouth force arm each time the pal: / is opened or closed.
  • the above-mentioned stellite 1 is hard-welded by overlay welding, but in recent years, it has been possible to reduce the amount of welding even to the difficult axis of welding such as the thin and gas-like welding like pulp for small engines. It has become necessary to supply a fixed amount of surface-hardened alloys in order to carry out hard metal hardening work.
  • the raw material mother alloy is used to add the active metal, but in the case of continuous casting, the molten metal is retained in the furnace for a long time, so its surface Part of the active metal acid It is said that the change occurs and component fluctuation occurs. Therefore, in order to compensate for the oxidative loss of the active metal, it is necessary to continuously add the active metal to the molten metal in small amounts at a constant rate and continuously.
  • the supplementary addition of such an inactive metal component is carried out by weighing a plate material, a lump material, or a chip-shaped material and intermittently introducing it by hand.
  • the build-up alloy and the supply mother alloy have a shape in which granular or spherical rollers are easily formed, and that continuous quantitative addition is carried out while this is done. It is being adopted as a thing.
  • the shape of the supply metal alloy in the automatic metallurgical device for surface hardening metal alloy should be changed from rod to grain! ), And the demand for active metal master alloys added to copper alloys has changed to spherical ones and having a certain weight.
  • the means for directly producing metal particles from a molten metal was mainly used for low melting point metals such as tin, pig iron and zinc, but as a typical example thereof, a saucer (tundish with many small holes is used. It is possible to pour the molten metal into), drop the molten metal into the small holes and drop it into water or low-viscosity oil, and allow it to solidify.
  • the inventors of the present invention particularly find a method of producing a spherical metal particle having a desired size and a high yield, which can be applied to a metal having a high melting point and poor workability. Focusing on the high efficiency of the method of directly obtaining metal particles from the molten metal, various studies were conducted on the structure of the refractory container and nozzle used for it, the heating melting and dropping means, and the solidification-cooling means. As a result, the following findings (a) to () have been obtained.
  • the metal in the refractory container or the molten alloy prepared to the specified composition is dripped into a small liquid droplet from the small hole nozzle provided at the bottom of the refractory container and solidified in the coolant.
  • the small hole nozzle has an inner diameter of 0.3 to 3.0 Use one that has one or two or more straight holes, and the molten metal droplets from this small hole diameter nozzle have an upper layer viscosity: ISO (International Viscosity Standard) VG
  • the refractory container used in the method of the present invention is a tundish type container that simply holds molten metal and keeps it warm, or has a carbon heating element for keeping warm outside, and stores it by high-frequency induction heating. In other words, it means anything that can hold molten metal and supply it to the outside of the container through a nozzle at the bottom, such as a crucible furnace type.
  • the inner diameter of the vertical hole of the small hole diameter nozzle provided at the bottom of the refractory container is limited to 0.3 to 3.0 hulls because the surface of the molten metal is limited if the inner diameter of the vertical hole is less than 0.3 »0. Even if the molten metal is added due to the tension, it does not flow down from the nozzle to the extent that it can be used practically. The reason is that even if it falls into the oil layer, it will not form a metal particle of a fixed shape in the shape of a pearl or a teardrop. And, in order to stably obtain the desired spherical metal particles, it is preferable to adjust the inner diameter of the vertical hole of the nozzle to about 0.5 to 2.0, and to improve workability and maintenance. From a theoretical point of view, it is recommended to replace the nozzle with a firing nozzle that can be freely replaced. If the nozzle hole is provided vertically, It becomes difficult to obtain granular droplets.
  • the viscosity of the oil used as a coolant is limited to ISO VG "10 to 680.
  • the speed of the molten metal droplet passing through the oil layer is high due to insufficient viscosity, Shaped droplets are shaped into spheres and the thickness of the oil layer required to form a solidified shell increases!), And it becomes necessary to deepen the cooling tank.
  • the cooling oil should have a viscosity of IS ⁇ VG "10 to 680, and it should have a viscosity of S OV & 3 2 to 460 (equivalent to SAE l 0W to SAE 10). Those with are recommended.
  • the molten metal droplets can be solidified into the desired spherical shape, but if workability is taken into consideration, the flash point .: 150 ° It is preferable to use a lubricating oil of C or higher (preferably -200 ° C or higher) (whether for automobiles, ships, industrial use, or general use). This is because the refractory container that holds the molten metal is close to the surface of the oil, which is the cooling liquid, so that there is no risk of oil ignition.
  • the surface of the oil layer should be inert gas or carbon dioxide. It is possible to prevent the oil from catching fire by covering it in a gas atmosphere and performing the work.
  • the thickness of the oil layer may be such that the molten metal droplets can form a spherical shell on the surface while passing through the layer, and, of course, the droplets are completely solidified in the oil layer. It doesn't matter.
  • the value of the inner diameter of the nozzle vertical hole, the viscosity range of the cooling oil, etc. as described above may not be applicable only to the production of spherical particles such as surface hardening hardfacing alloy and copper master alloy like Stellite. Needless to say, it is also a condition for surely forming spherical particles of various other metals or alloys.
  • any material generally known as a material for handling molten metal such as aluminum, magnesia, and zirconia can be used] 9
  • the particle size can also be appropriately selected depending on the type of metal, the size of spherical metal particles to be produced, and the like.
  • FIG. 1 is a schematic vertical cross-sectional schematic view of one example of a molten metal dropping device (refractory container) used in the present invention
  • FIG. 2 is a vertical section showing another example of the molten metal dropping device used in the present invention
  • FIG. 3 is a schematic diagram of a plane
  • FIG. 3 is a schematic diagram of a vertical cross section of the spherical metal particle manufacturing apparatus used in the examples of the present invention.
  • the refractory container shown in Fig. 1 consists of an aluminum crucible 3 with a small hole nozzle 2 made of aluminum and having a plurality of vertical holes 1 at the bottom J?
  • the outside of 3 is surrounded by a heating element 4 made of carbon, and it is located inside a high frequency induction heating coil 5.
  • the reference numeral 6 indicates that the heating element 4 made of carbon dioxide and the high-frequency induction heating coil 5 are held and the radiant heat is applied.
  • the raw material alloy 7 previously melted to the desired composition is charged into the crucible 3, heated and melted by the high-frequency induction coil 5, and the liquid from the lower end of the small hole nozzle 2 is melted. Drop 8 into the cooling liquid.
  • Fig. 2 it is applied when the diameter of the vertical hole of the nozzle is extremely small.
  • the main part has the same structure as that shown in Fig. 1 (in Fig. 2, those having the same function as in Fig. 1 are denoted by the same reference numerals), but in this example, the crucible 3
  • the opening of the is covered with a refractory wool 9 for preventing leakage of inert gas (including reducing gas), and a lid 11 having an inlet 10 for inert gas (including reducing gas) is used. Therefore, it is possible to pressurize the melted raw material alloy 7 with an inert gas, so that even if the diameter of the vertical hole 1 of the small-diameter nozzle 2 is small, the droplet will be smoothed. It is possible to drop it.
  • each one of these raw materials was melted using an apparatus as shown in FIG. 3, and dropped into a cooling liquid to produce each spherical alloy grain.
  • the refractory container is Similar to the one shown in Fig. 1 except that there is one vertical hole in the crane.
  • Drop of liquid droplet'Coagulation part is as follows. That is, below the alumina refractory material 6, there is provided a heat insulating water cooling board 13 for preventing the temperature of the cooling oil 12 from rising due to the radiant heat of the heating element. It is equipped with an inert gas inlet 14 for introducing an inert gas to prevent this.
  • a cooling cylinder 15 and a spherical metal particle receptor 16 are arranged next to the water cooling board 13 for heat insulation.] Inside the cooling cylinder 15, cooling oil 12 and cooling water 17 are contained in a two-layer state. There is.
  • the reference numeral 18 indicates a water-cooled corrugated pipe for suppressing the temperature rise of the cooling oil 12, and the reference numeral 19 indicates spherical metal particles.
  • the vertical hole diameters are different for each alloy shown in Table 1 above.
  • the lubricating oil of was used.
  • the vertical diameter of the nozzle was set to 0.1 rai? 5 , 0.3 wisteria 0, 0.5 dragon 0, 0.6 mm ⁇ , 0.7 ⁇ , 0.8 basket 0, 1 0.0 mm, 1.5 ⁇ , 2.0 ⁇ ⁇ , 3.0 j »0 and 4.0 were changed to produce the alloy grains, and the results shown in Table 3 were obtained.
  • Type C Fe W Si B Go + Impurity Ni + Impurity Cu + Impurity
  • Type 154 182 183 ⁇ 242 243 ⁇ 285 286 ⁇ 32 360 ⁇ 50 Lord 505 ⁇ 540 541 ⁇ 567
  • spherical metal particles of a desired size can be mass-produced relatively easily in a single cylinder and at a high rate of mass production.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

Dans ce prpcédé, un métal ou un alliage fondu dans une cuve réfractaire est disposé de manière à tomber sous forme d'une petite gouttelette depuis une buse de faible diamètre ménagée dans le fond de la cuve, et est solidifié dans un milieu de refroidissement pour obtenir ainsi un granule métallique. Le procédé consiste à employer une buse de faible diamètre possédant un ou plusieurs alésages verticaux de diamètre intérieur compris entre 0,3 et 3 mm, à faire tomber le métal fondu de la buse dans un liquide de refroidissement constitué de deux couches, à savoir, une couche supérieure d'une huile ayant une viscosité ISOVG comprise entre 10 et 680 (Normes internationales d'indice de viscosité) et une couche inférieure d'eau, et à faire passer le métal fondu dans le liquide de sorte qu'il soit solidifié et réfroidi; il est ainsi possible de fabriquer des granules métalliques sphéroïdaux de forme homogène avec un rendement et une efficacité élevés.
PCT/JP1984/000613 1983-11-25 1984-12-24 Procede de fabrication de granules metalliques spheroidaux WO1986003700A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019850700001A KR900007962B1 (ko) 1984-12-24 1984-12-24 구상금속입자의 제조방법
PCT/JP1984/000613 WO1986003700A1 (fr) 1983-11-25 1984-12-24 Procede de fabrication de granules metalliques spheroidaux
SE8603557A SE8603557L (sv) 1983-11-25 1986-08-22 Forfarande for framstellning av sferoidala metallpartiklar

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58221896A JPS60114508A (ja) 1983-11-25 1983-11-25 球状金属粒の製造方法
PCT/JP1984/000613 WO1986003700A1 (fr) 1983-11-25 1984-12-24 Procede de fabrication de granules metalliques spheroidaux

Publications (1)

Publication Number Publication Date
WO1986003700A1 true WO1986003700A1 (fr) 1986-07-03

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Application Number Title Priority Date Filing Date
PCT/JP1984/000613 WO1986003700A1 (fr) 1983-11-25 1984-12-24 Procede de fabrication de granules metalliques spheroidaux

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Country Link
WO (1) WO1986003700A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325798A1 (fr) * 1988-01-14 1989-08-02 Electroplating Engineers of Japan Limited Poudre métallique, pâte préparée à partir de cette poudre et installation pour la préparation de cette poudre
CN109773199A (zh) * 2019-01-15 2019-05-21 中国科学院合肥物质科学研究院 一种多尺度锂球的快速制备方法
CN110976874A (zh) * 2019-12-10 2020-04-10 上海工程技术大学 一种焊丝喷头的立体成型装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528359A (en) * 1978-08-22 1980-02-28 Nippon Mining Co Ltd High carbon ferronickel shotting method
JPS5914083B2 (ja) * 1981-05-19 1984-04-03 日本鉱業株式会社 亜鉛又は亜鉛合金ショット球の製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528359A (en) * 1978-08-22 1980-02-28 Nippon Mining Co Ltd High carbon ferronickel shotting method
JPS5914083B2 (ja) * 1981-05-19 1984-04-03 日本鉱業株式会社 亜鉛又は亜鉛合金ショット球の製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325798A1 (fr) * 1988-01-14 1989-08-02 Electroplating Engineers of Japan Limited Poudre métallique, pâte préparée à partir de cette poudre et installation pour la préparation de cette poudre
CN109773199A (zh) * 2019-01-15 2019-05-21 中国科学院合肥物质科学研究院 一种多尺度锂球的快速制备方法
CN109773199B (zh) * 2019-01-15 2021-05-28 中国科学院合肥物质科学研究院 一种多尺度锂球的快速制备方法
CN110976874A (zh) * 2019-12-10 2020-04-10 上海工程技术大学 一种焊丝喷头的立体成型装置

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