WO2018079160A1 - Procédé de production de poudre mélangée destinée à la métallurgie des poudres, et équipement de production de poudre mélangée destinée à la métallurgie des poudres - Google Patents

Procédé de production de poudre mélangée destinée à la métallurgie des poudres, et équipement de production de poudre mélangée destinée à la métallurgie des poudres Download PDF

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Publication number
WO2018079160A1
WO2018079160A1 PCT/JP2017/034554 JP2017034554W WO2018079160A1 WO 2018079160 A1 WO2018079160 A1 WO 2018079160A1 JP 2017034554 W JP2017034554 W JP 2017034554W WO 2018079160 A1 WO2018079160 A1 WO 2018079160A1
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Prior art keywords
mixing
powder
stirring
stirring device
raw material
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PCT/JP2017/034554
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English (en)
Japanese (ja)
Inventor
園部　秋夫
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Ｊｆｅスチール株式会社
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Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to CN201780065223.8A priority Critical patent/CN109862977B/zh
Publication of WO2018079160A1 publication Critical patent/WO2018079160A1/fr

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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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties

Definitions

  • the present invention relates to a method for producing a powder mixture for powder metallurgy and a facility for producing a powder mixture for powder metallurgy.
  • Powders used in powder metallurgy technology are iron-based powders that are basic components, powders containing alloy components (hereinafter referred to as alloy powders), and powders for alloys thereof Is mixed with a binder (hereinafter referred to as a binder) that adheres to the surface of the iron-based powder.
  • alloy powders powders containing alloy components
  • a binder powders for alloys thereof Is mixed with a binder (hereinafter referred to as a binder) that adheres to the surface of the iron-based powder.
  • auxiliary materials such as solid lubricant, machinability improving material powder, slidability improving material powder, and fluidity improving material powder are added as required are also used.
  • Patent Document 1 an alloy powder, a machinability improving powder, and a solid lubricant are added to an iron-based powder and mixed first, then a binder is added and secondarily mixed while raising the temperature, and further cooled.
  • a method of performing tertiary mixing has been proposed.
  • Patent Document 2 proposes a method of mixing raw materials obtained by adding alloy powder, binder, and auxiliary raw materials to iron-based powder by primary mixing and secondary mixing.
  • the raw material is stirred while being heated to a temperature equal to or higher than the melting point of the binder, and then stirred while being held at the temperature, and further while being cooled from the temperature.
  • the secondary mixing the mixed powder obtained by the primary mixing is stirred while cooling.
  • heating and cooling are performed by a single mixing device in order to continuously perform heating and cooling in the primary mixing.
  • the outer periphery of the mixing and stirring apparatus is a double wall, and high temperature steam or oil is flowed between the double walls during heating, and low temperature water or oil is flowed during cooling.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a manufacturing method and a manufacturing facility for a mixed powder for powder metallurgy that are high in safety and excellent in production efficiency.
  • a method for producing a mixed powder for powder metallurgy comprising: A primary mixing and stirring step of mixing and stirring a raw material composed of an iron-based powder, an alloy powder, a binder, and auxiliary materials using a first mixing and stirring device including a heating unit; A secondary mixing and stirring step in which the raw material after the primary mixing and stirring step is mixed and stirred using a second mixing and stirring device provided with a cooling means different from the first mixing and stirring device; A tertiary mixing and stirring step of mixing and stirring the raw material after the secondary mixing and stirring step using a third mixing and stirring device different from the first mixing and stirring device and the second mixing and stirring device.
  • the raw material is heated to a temperature T 1 higher than the melting point T m of the binder, wherein in the second mixing and stirring step, the raw material is cooled to the T lower than the m temperature T 2, the production method of the mixed powder for powder metallurgy.
  • auxiliary material is one or more selected from the group consisting of a solid lubricant, a machinability improving material powder, a slidability improving material powder, and a fluidity improving material powder. Manufacturing method of mixed powder.
  • the processing time of the primary mixing and stirring step is the same as the processing time of the secondary mixing and stirring step, 4.
  • a facility for producing mixed powder for powder metallurgy A first mixing and stirring device including heating means for mixing and stirring the raw material composed of iron-based powder, alloy powder, binder, and auxiliary materials; A second mixing and stirring device comprising a cooling means for further mixing the raw materials mixed and stirred by the first mixing and stirring device; A facility for producing mixed powder for powder metallurgy, comprising a third mixing and stirring device for further mixing the raw materials mixed and stirred by the second mixing and stirring device.
  • the manufacturing equipment of the mixed powder for powder metallurgy of said 5 provided with the storage tank for storing the raw material mixed and stirred by the 2nd mixing and stirring apparatus for several batches.
  • a mixed powder for powder metallurgy can be produced safely and efficiently by simple means.
  • FIG. 1 is a schematic diagram showing a flow of a method for producing a powder mixture for powder metallurgy according to an embodiment of the present invention.
  • the mixing and stirring of the raw materials includes a primary mixing and stirring step using the first mixing and stirring device 10, a secondary mixing and stirring step using the second mixing and stirring device 20, and a third mixing and stirring device. This is carried out by three steps of the tertiary mixing and stirring step using 30. Finally, a mixed powder for powder metallurgy is obtained.
  • the powder after the secondary mixing and stirring step can optionally be subjected to the tertiary mixing and stirring step after being temporarily accumulated using the storage tank 40 or the like.
  • the raw material to be used and the contents of the process in each step will be specifically described.
  • a raw material comprising an iron-based powder, an alloy powder, a binder, and auxiliary materials is used.
  • the components of the raw material will be described first.
  • any iron-based powder can be used without any particular limitation.
  • the iron-based powder include iron powder (so-called pure iron powder) and alloy steel powder.
  • the method for producing the iron-based powder is not limited, and for example, an atomized iron-based powder produced by an atomizing method or a reduced iron-based powder produced by a reducing method (reduced iron- iron-based powder produced by any method such as based powder).
  • a water atomizing method can be used as the atomizing method.
  • the “iron-based powder” refers to a metal powder having an Fe content of 50% by mass or more, and the “iron powder” refers to a powder composed of Fe and inevitable impurities.
  • the particle size of the iron-based powder is not particularly limited and may be any value, but is preferably 60 mesh (250 ⁇ m) or less.
  • the apparent density of the iron-based powder is not particularly limited and can be any value, but it is preferably 2.3 to 3.3 Mg / m 3 .
  • the alloy powder is not particularly limited, and any powder containing an alloy element can be used.
  • the alloy powder include carbon powder such as graphite powder, non-ferrous metal powder such as Cu powder, Mo powder and Ni powder, and metal oxide powder such as cuprous oxide powder. Only one type of the alloy powder can be used, but two or more types can be used in combination.
  • the alloy powder is fixed to the surface of the iron-based powder by a binder.
  • the binder is not particularly limited, and any binder can be used as long as it can bind the iron-based powder and the alloy powder.
  • the binder for example, one or more selected from the group consisting of fatty acids, fatty acid amides, fatty acid bisamides, and metal soaps can be used.
  • any auxiliary raw material can be used.
  • the auxiliary material is preferably one or more selected from the group consisting of solid lubricant, machinability improving material powder, slidability improving material powder, and fluidity improving material powder.
  • the solid lubricant is not particularly limited, and any solid lubricant can be used.
  • the solid lubricant it is preferable to use at least one of zinc stearate and ethylene bisamide.
  • the machinability improving material powder is not particularly limited, and any machinability improving material powder can be used.
  • MnS powder is preferably used as the machinability improving material powder.
  • the sliding property improving material powder is not particularly limited, and any sliding property improving material powder can be used.
  • the sliding property improving material powder it is preferable to use at least one of S (sulfur) powder and Mo 2 S powder.
  • the fluidity improving material powder is not particularly limited, and any fluidity improving material powder can be used.
  • the fluidity improving material powder it is preferable to use at least one of SiO 2 powder and carbon black.
  • the raw material is charged into the first mixing and stirring device 10 and mixed and stirred.
  • the first mixing and stirring device 10 any device can be used as long as it is a mixing and stirring device provided with heating means.
  • a high-speed bottom stirring mixer is preferably used, and in particular, a Henschel mixer is preferably used.
  • the high-speed bottom agitating mixer agitates and mixes the powder in the mixing tank by rotating the rotating blades 11 provided at the bottom of the mixing tank around the rotating shaft 12. Is.
  • the first mixing and stirring device 10 needs to have a heating means for heating the raw material.
  • the heating means is not particularly limited, and any heating means can be used as long as it can heat the charged raw material.
  • the raw material in the mixing tank can be heated by circulating the heat medium through the double structure 13 with the outer periphery of the first mixing and stirring device 10 as a double wall.
  • the heat medium for example, steam or oil can be used.
  • a heater can also be used as the heating means.
  • an electric heater can be used as the heater.
  • a plurality of heating means can be used in combination.
  • the first mixing and stirring device preferably includes a heating unit and does not include a cooling unit.
  • the raw material is heated to a temperature T 1 higher than the melting point T m of the binder contained in the raw material.
  • T 1 the melting point of the binder contained in the raw material.
  • the heating procedure is not particularly limited, but from the viewpoint of uniform adhesion, it is preferable that the temperature is raised to temperature T 1 while stirring, and then further stirred while maintaining the temperature T 1 .
  • the primary mixing and stirring is stopped, and the powder in the first mixing and stirring device 10 is discharged.
  • the discharged powder is subjected to the next secondary mixing and stirring step.
  • the raw material powder that has been mixed and stirred in the primary mixing and stirring step is charged into a second mixing and stirring device that is provided with a cooling means different from the first mixing and stirring device.
  • a second mixing and stirring device any mixing stirring device provided with a cooling means can be used.
  • the second mixing and stirring device 20 it is preferable to use a high-speed bottom stirring mixer, and it is particularly preferable to use a Henschel mixer that has a strong stirring force and can increase the cooling rate.
  • the second mixing and stirring device 20 needs to have a cooling means for cooling the raw material.
  • the cooling means is not particularly limited, and any means can be used as long as it can cool the powder in the second mixing and stirring device 20.
  • the outer periphery of the second mixing and stirring device 20 is used as a double wall, and the cooling medium is circulated through the double structure portion 23 to cool the raw material in the mixing tank. Can do.
  • low-temperature water or oil can be used as the cooling medium.
  • the second mixing and stirring apparatus preferably includes a cooling unit and does not include a heating unit.
  • the raw material is cooled to a temperature T 2 lower than the melting point T m of the binder contained in the raw material.
  • T 2 the melting point of the binder contained in the raw material.
  • the cooling method is not particularly limited, but it is preferable to cool to temperature T 2 while stirring.
  • the temperature T 2 can be any temperature as long as it is lower than the melting point T m of the binder, but is preferably room temperature.
  • heating and cooling are performed by separate mixing and stirring devices such that only heating is performed in the primary mixing and stirring step and only cooling is performed in the secondary mixing and stirring step.
  • the contaminated mixed powder cannot be made into a product, and production is not possible during the repair period of cracks, reducing production efficiency.
  • the occurrence of such a problem can be prevented.
  • the first mixing and stirring device 10 does not perform cooling, the temperature of the double structure portion 13 of the mixing and stirring device does not decrease even when mixing and stirring the next batch, and the vicinity of the heating temperature T 1 Therefore, the temperature increase time in the next batch can be shortened, and energy loss can be suppressed.
  • the secondary mixing and stirring is stopped, and the powder in the second mixing and stirring device 20 is discharged.
  • the discharged powder is subjected to the next tertiary mixing and stirring step.
  • the raw material powder that has been mixed and stirred in the secondary mixing and stirring step is charged into a third mixing and stirring device 30 that is different from the first mixing and stirring device and the second mixing and stirring device.
  • the powder can be temporarily stored in a storage means such as a storage tank 40 before being charged into the third mixing device, and the description of this case will be described later.
  • the third mixing and stirring device 30 any device can be used, but it is preferable to use a W cone type mixer.
  • the final mixed powder for powder metallurgy can be obtained by performing stirring and mixing using the third mixing and stirring device 30.
  • the third mixing and stirring device 30 can be a mixing and stirring device that does not include heating means and cooling means.
  • an additional auxiliary material can be added.
  • the additional auxiliary material one or more selected from the group consisting of a solid lubricant, a machinability improving material powder, a slidability improving material powder, and a fluidity improving material powder can be used.
  • the additional auxiliary material may be the same as or different from the auxiliary material included in the raw material used in the primary mixing and stirring step.
  • a batch composed of a primary mixing and stirring step and a secondary mixing and stirring step are separately performed in a plurality of batches, and then the powder obtained in each of the plurality of batches is collected and the tertiary mixing is performed. It can use for a stirring process.
  • multiple batches of powder can be batch mixed and stirred at one time, so that multiple batches of powder can be made into one lot of mixed powder for powder metallurgy. The number can be reduced, and daily management such as quality control can be made more efficient.
  • the powder discharged from the second mixing and stirring device 20 is added to the third mixing and stirring device 30 as needed.
  • it can also be stored in storage means such as a storage tank 40. Accordingly, the primary mixing and stirring step and the secondary mixing and stirring step can be performed without being limited even while the third mixing and stirring device 30 is mixing and stirring the powder of the previous lot. .
  • the storage capacity V S and the processing capacity V 3 of the third mixing and stirring apparatus are 2 or more of the processing volume V 2 of the mixing and stirring apparatus 2 is preferable.
  • the processing times of the primary mixing and stirring step and the secondary mixing and stirring step in order to maximize the efficiency in industrial production, it is preferable to equalize the processing times of the primary mixing and stirring step and the secondary mixing and stirring step. Further, in the tertiary mixing stirring process, while the mixed powder that has been subjected to the secondary mixing stirring process is being stored in the storage tank 13, the process is completed so as not to cause congestion in the primary mixing stirring process and the secondary mixing stirring process. It is desirable to design. For example, as described above, when the powders obtained in a plurality of batches of the secondary mixing and stirring step are collectively used for the tertiary mixing and stirring step, the processing time of the tertiary mixing and stirring step is set to the processing of the plurality of batches. It is preferable that the time is not longer than the time.

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  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un procédé et un équipement de production d'une poudre mélangée pour la métallurgie des poudres, qui assurent une sécurité élevée et possèdent une excellente efficacité de production. Le procédé de production d'une poudre mélangée pour la métallurgie des poudres comprend : une étape de mélange/agitation primaire pour mélanger et agiter une matière première comportant une poudre à base de fer, une poudre pour un alliage, un liant et une matière première auxiliaire à l'aide d'un premier dispositif de mélange/agitation doté d'un moyen de chauffage ; une étape de mélange/agitation secondaire pour mélanger et agiter la matière première après l'étape de mélange/agitation primaire à l'aide d'un deuxième dispositif de mélange/agitation qui est différent du premier dispositif de mélange/agitation et qui est doté d'un moyen de refroidissement ; et une étape de mélange/agitation tertiaire pour mélanger et agiter la matière première après l'étape de mélange/agitation secondaire à l'aide d'un troisième dispositif de mélange/agitation qui est différent du premier dispositif de mélange/agitation et du deuxième dispositif de mélange/agitation, la matière première étant chauffée jusqu'à une température T1 supérieure à un point de fusion Tm du liant dans l'étape de mélange/agitation primaire, et la matière première étant refroidie jusqu'à une température T2 inférieure à Tm dans l'étape de mélange/agitation secondaire.
PCT/JP2017/034554 2016-10-24 2017-09-25 Procédé de production de poudre mélangée destinée à la métallurgie des poudres, et équipement de production de poudre mélangée destinée à la métallurgie des poudres WO2018079160A1 (fr)

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Application Number Priority Date Filing Date Title
CN201780065223.8A CN109862977B (zh) 2016-10-24 2017-09-25 粉末冶金用混合粉末的制造方法和粉末冶金用混合粉末的制造设备

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JP2016-207967 2016-10-24
JP2016207967A JP6561962B2 (ja) 2016-10-24 2016-10-24 粉末冶金用混合粉末の製造方法および粉末冶金用混合粉末の製造設備

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KR102364527B1 (ko) * 2018-05-28 2022-02-17 제이에프이 스틸 가부시키가이샤 분말 야금용 분말 혼합물 및 그 제조 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016163A (fr) * 1973-06-14 1975-02-20
JPH0247201A (ja) * 1988-08-08 1990-02-16 Kawasaki Steel Corp 粉末冶金用鉄基粉末混合物の製造方法
JPH03162502A (ja) * 1989-11-20 1991-07-12 Kawasaki Steel Corp 粉末冶金用鉄基粉末混合物の製造方法
WO2009025274A1 (fr) * 2007-08-20 2009-02-26 Jfe Steel Corporation Procédé de mélange pour poudre brute pour métallurgie des poudres et procédé pour produire de la poudre brute pour métallurgie des poudres
CN103394686A (zh) * 2013-07-25 2013-11-20 莱芜钢铁集团有限公司 一种粉末冶金铁基混合粉的两段式干法混合方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002020801A (ja) * 2000-07-07 2002-01-23 Kawasaki Steel Corp 粉末冶金用鉄基混合粉
US6464751B2 (en) * 2000-10-06 2002-10-15 Kawasaki Steel Corporation Iron-based powders for powder metallurgy
CN101384387B (zh) * 2006-02-15 2011-12-21 杰富意钢铁株式会社 铁基混合粉末以及铁基粉末成形体和铁基粉末烧结体的制造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016163A (fr) * 1973-06-14 1975-02-20
JPH0247201A (ja) * 1988-08-08 1990-02-16 Kawasaki Steel Corp 粉末冶金用鉄基粉末混合物の製造方法
JPH03162502A (ja) * 1989-11-20 1991-07-12 Kawasaki Steel Corp 粉末冶金用鉄基粉末混合物の製造方法
WO2009025274A1 (fr) * 2007-08-20 2009-02-26 Jfe Steel Corporation Procédé de mélange pour poudre brute pour métallurgie des poudres et procédé pour produire de la poudre brute pour métallurgie des poudres
CN103394686A (zh) * 2013-07-25 2013-11-20 莱芜钢铁集团有限公司 一种粉末冶金铁基混合粉的两段式干法混合方法

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JP6561962B2 (ja) 2019-08-21
CN109862977A (zh) 2019-06-07
JP2018070903A (ja) 2018-05-10
CN109862977B (zh) 2021-04-30

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