WO2016190039A1 - Mélange de poudres pour métallurgie des poudres à base de fer, corps fritté fabriqué à l'aide de celui-ci - Google Patents

Mélange de poudres pour métallurgie des poudres à base de fer, corps fritté fabriqué à l'aide de celui-ci Download PDF

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WO2016190039A1
WO2016190039A1 PCT/JP2016/063170 JP2016063170W WO2016190039A1 WO 2016190039 A1 WO2016190039 A1 WO 2016190039A1 JP 2016063170 W JP2016063170 W JP 2016063170W WO 2016190039 A1 WO2016190039 A1 WO 2016190039A1
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powder
iron
weight
oxide
sintered body
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PCT/JP2016/063170
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English (en)
Japanese (ja)
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宣明 赤城
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株式会社神戸製鋼所
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Priority to CN201680029929.4A priority Critical patent/CN107614157B/zh
Priority to US15/569,008 priority patent/US20180126454A1/en
Priority to EP16799747.7A priority patent/EP3305440B1/fr
Priority to KR1020177036354A priority patent/KR20180008733A/ko
Priority to KR1020197025709A priority patent/KR102060955B1/ko
Publication of WO2016190039A1 publication Critical patent/WO2016190039A1/fr

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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
    • 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
    • B22F1/12—Metallic powder containing non-metallic 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy
    • C22C33/0228—Using a mixture of prealloyed powders or a master alloy comprising other non-metallic compounds or more than 5% of graphite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2302/00—Metal Compound, non-Metallic compound or non-metal composition of the powder or its coating
    • B22F2302/25—Oxide
    • 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
    • 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
    • C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
    • C22C1/055—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using carbon

Definitions

  • the present invention relates to a mixed powder for iron-based powder metallurgy and a sintered body produced using the same, and more specifically, an iron group containing a binary oxide and a ternary oxide in a specific weight ratio.
  • the present invention relates to a powder mixture for powder metallurgy and a sintered body produced using the same.
  • Powder metallurgy is widely used as an industrial production method for various machine parts.
  • the procedure for iron-based powder metallurgy is to first prepare a mixed powder by mixing an iron-based powder, an alloy powder such as a copper (Cu) powder, a nickel (Ni) powder, a graphite powder, and a lubricant. .
  • the mixed powder is filled into a mold, press-molded, and sintered to produce a sintered body.
  • a machine part having a desired shape is prepared by subjecting the sintered body to cutting such as drilling or turning.
  • the ideal of powder metallurgy is to process the sintered body so that it can be used as a machine part without cutting the sintered body.
  • the sintering may cause uneven shrinkage of the raw material powder.
  • the dimensional accuracy required for mechanical parts is high, and the shape of the parts is complicated. For this reason, it is becoming essential to cut the sintered body. From such a background, machinability is imparted to the sintered body so that the sintered body can be processed smoothly.
  • MnS manganese sulfide
  • the addition of MnS powder is effective for relatively low-speed cutting such as drilling.
  • the addition of manganese sulfide powder is not necessarily effective for high-speed cutting in recent years, and there are problems such as generation of dirt on the sintered body and reduction in mechanical strength.
  • Patent Documents 1 to 4 have been proposed as methods other than adding the above-described manganese sulfide.
  • Patent Document 1 Japanese Patent Publication No. 52-16684
  • 0.1 to 1.0% of calcium sulfide and 0. 0% of iron-based raw material powder containing carbon and copper in a required amount of iron powder are disclosed.
  • a sintered steel containing 1-2% carbon (C) and 0.5-5.0% copper (Cu) is disclosed.
  • Patent Document 2 Japanese Patent Publication No. 2008-502807 discloses a metallurgical powder composition containing a powder containing calcium aluminate. Powder containing the calcium aluminate, 51 and to 57% by weight alumina, and calcium oxide 31-37% by weight, and SiO 2 of less than 6.0 wt%, less than 2.5 wt.% Fe 2 O 3 If, comprising the TiO 2 of less than 3.0 wt%, and 2.0 wt% less than MgO, and K 2 O of less than 0.2 wt%, less than 0.2 wt% of sulfur.
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2010-236061
  • SiO 2 —CaO—MgO-based oxide powder in a ratio of 0.01 to 1.0 part by mass with respect to 100 parts by mass of iron-based powder.
  • An iron-based mixed powder is disclosed.
  • Patent Document 4 Japanese Patent Laid-Open No. 09-279204
  • a powder of CaO—Al 2 O 3 —SiO 2 based composite oxide mainly composed of iron powder and having an average particle size of 50 ⁇ m or less is 0.02 to 0.3.
  • An iron-based mixed powder for powder metallurgy containing by weight is disclosed.
  • this excessive amount of CaO reacts with other oxides or sulfur or is present alone, the characteristics of the sintered body are difficult to stabilize.
  • the present invention has been made in view of the above-described present situation, and an object of the present invention is to provide an iron-based powder capable of producing a sintered body excellent in machinability both in the initial stage of cutting and in long-term cutting. It is to provide mixed powder for metallurgy.
  • the mixed powder for iron-based powder metallurgy according to the present invention includes one or more ternary oxides selected from the group consisting of Ca—Al—Si oxides and Ca—Mg—Si oxides, and Ca—Al. And one or more binary oxides selected from the group consisting of Ca oxides and Ca—Si oxides, and the total weight of the ternary oxides and the binary oxides is 0.025. Contains from 0.3% to 0.3% by weight.
  • the present invention is also a sintered body produced by sintering the above mixed powder for iron-based powder metallurgy.
  • the inventor of the present invention includes an oxide (2CaO.Al 2 O 3 .SiO 2 powder) contained in a sintered body and a titanium oxide (TiO 2 ) powder contained in a cutting tool or a cutting tool coating.
  • the reaction mechanism was confirmed. Specifically, a mixed powder of 2CaO ⁇ Al 2 O 3 ⁇ SiO 2 powder and TiO 2 powder was heated in an atmosphere under no pressure, and the reaction product was analyzed by X-ray diffraction.
  • the present inventor has formed a protective film immediately after the start of cutting, in a state where the cutting edge temperature of the cutting tool is low, the reaction between the ternary oxide and TiO 2 in the tool does not occur sufficiently. It was assumed that it was difficult to do.
  • the present inventor when a certain period of time has elapsed from the start of cutting and the cutting edge temperature of the cutting tool becomes high, Ca in the ternary oxide reacts with TiO 2 on the tool surface to protect the tool surface. While forming the film, it was confirmed that various binary oxides were formed. The present inventor has lost the Ca in the binary oxide by reacting with TiO 2 on the surface of the cutting tool, and causes hard wear by generating hard Al 2 O 3 and SiO 2. It was assumed that the ternary oxide exhibited the effect of suppressing tool wear more than the binary oxide in cutting during the period.
  • the inventor has improved the machinability at the initial stage of cutting with a binary oxide, and cuts in long-time cutting with a ternary oxide in which hard Al 2 O 3 and SiO 2 are not easily generated. As a result, the present invention shown below was completed.
  • the present invention it is possible to provide a mixed powder for iron-based powder metallurgy capable of producing a sintered body excellent in machinability both in the initial stage of cutting and in long-term cutting.
  • the mixed powder for iron-based powder metallurgy of the present invention is preferably formed by mixing an iron-based powder, a ternary oxide, and a binary oxide.
  • Various additives such as an alloy powder, a graphite powder, a lubricant, a binder, and a machining accelerator may be appropriately added to the mixed powder.
  • a small amount of inevitable impurities may be contained in the mixed powder in the process of manufacturing the mixed powder for iron-based powder metallurgy.
  • the mixed powder for iron-based powder metallurgy according to the present invention can be obtained by filling a metal mold or the like and molding it, followed by sintering.
  • the sintered body produced in this way can be used for various machine parts by cutting. The use and manufacturing method of this sintered body will be described later.
  • the iron-based powder is a main component constituting the mixed powder for iron-based powder metallurgy, and is preferably contained in a weight ratio of 60% by weight or more with respect to the entire mixed powder for iron-based powder metallurgy.
  • the weight% of iron-base powder here means the ratio for the total weight other than a lubricant among the mixed powder for iron-base powder metallurgy.
  • the definition means the weight ratio in the total weight of the iron-based powder metallurgy mixed powder excluding the lubricant.
  • the iron-based powder atomized iron powder, pure iron powder such as reduced iron powder, partially diffusion alloyed steel powder, fully alloyed steel powder, or hybrid steel powder in which alloy components are partially diffused Etc. can be used.
  • the volume average particle diameter of the iron-based powder is preferably 50 ⁇ m or more, more preferably 70 ⁇ m or more. When the volume average particle diameter of the iron-based powder is 50 ⁇ m or more, the handleability is excellent.
  • the volume average particle size of the iron-based powder is preferably 200 ⁇ m or less, and more preferably 100 ⁇ m or less. When the volume average particle diameter of the iron-based powder is 200 ⁇ m or less, it is easy to form a precise shape and sufficient strength can be obtained.
  • the mixed powder for iron-based powder metallurgy according to the present invention includes both a binary oxide and a ternary oxide in a total weight of 0.025 wt% or more and 0.3 wt% or less.
  • the binary oxide can improve the machinability at the initial stage of cutting when the sintered body is used for cutting.
  • the ternary oxide can improve the machinability when cut for a long time. By containing both oxides in such a weight ratio, a sintered body excellent in machinability can be produced both in the initial stage of cutting and in long-term cutting.
  • the total weight of the oxide is preferably 0.03% by weight or more, more preferably 0.04% by weight or more, further preferably 0.05% by weight or more, and particularly preferably 0%. .1% by weight or more. From the viewpoint of cost, the smaller the weight ratio of the binary oxide and the ternary oxide, the better.
  • the total weight of the oxides is preferably 0.25% by weight or less, more preferably 0.2% by weight or less. When the total weight of the oxides is 0.25% by weight or less, the crushing strength of the sintered body can be sufficiently ensured.
  • the binary oxide means a complex oxide of two elements
  • the ternary oxide means a complex oxide of three elements.
  • the binary oxide is preferably a complex oxide of two elements selected from the group consisting of Ca, Mg, Al, Si, Co, Ni, Ti, Mn, Fe, and Zn. More preferred are system oxides, Ca—Si oxides, and the like.
  • Examples of the Ca—Al-based oxide include CaO ⁇ Al 2 O 3 and 12CaO ⁇ 7Al 2 O 3 .
  • Examples of the Ca—Si-based oxide include 2CaO ⁇ SiO 2 .
  • the ternary oxide is preferably a complex oxide of three elements selected from the group consisting of Ca, Mg, Al, Si, Co, Ni, Ti, Mn, Fe, and Zn.
  • -Si-based oxides, Ca-Mg-Si-based oxides and the like are more preferable.
  • Examples of the Ca—Mg—Si oxide include 2CaO ⁇ MgO ⁇ 2SiO 2 . Among these it is preferable to add 2CaO ⁇ Al 2 O 3 ⁇ SiO 2.
  • the 2CaO ⁇ Al 2 O 3 ⁇ SiO 2 reacts with TiO 2 contained in the coating applied in the cutting tool or cutting tool, by forming a protective film on the surface of the cutting tool, the machinability It can be remarkably improved.
  • the shape of the binary oxide and the ternary oxide is not particularly limited, but a spherical shape or a shape in which it is crushed, that is, a shape having a round shape as a whole is preferable.
  • the volume average particle diameter of the binary oxide and ternary oxide is preferably 0.1 ⁇ m or more, more preferably 0.5 ⁇ m or more, and further preferably 1 ⁇ m or more. As the volume average particle size is smaller, there is a tendency that the machinability of the sintered body can be improved by adding a small amount. Further, the volume average particle diameter is preferably 15 ⁇ m or less, more preferably 10 ⁇ m or less, and further preferably 9 ⁇ m or less. If the volume average particle diameter is too large, it becomes difficult to improve the machinability of the sintered body.
  • the volume average particle size is a value of the particle size D 50 of 50% of the integrated value in the particle size distribution obtained using a laser diffraction particle size distribution measuring apparatus (Microtrack “MODEL 9320-X100” manufactured by Nikkiso Co., Ltd.).
  • a laser diffraction particle size distribution measuring apparatus Microtrack “MODEL 9320-X100” manufactured by Nikkiso Co., Ltd.
  • the binary oxide is preferably contained in an amount of 0.01% by weight or more, more preferably 0.03% by weight or more, and further preferably 0.05% by weight or more.
  • the binary oxide is preferably contained in an amount of 0.25% by weight or less, more preferably 0.2% by weight or less, and still more preferably 0.15% by weight or less.
  • the ternary oxide is preferably contained in an amount of 0.01% by weight or more, more preferably 0.03% by weight or more, and still more preferably 0.05% by weight or more. Further, the ternary oxide is preferably contained in an amount of 0.25% by weight or less, more preferably 0.2% by weight or less, and further preferably 0.15% by weight or less. By including such a weight ratio, it is possible to obtain a sintered body excellent in machinability even during long-term cutting while suppressing cost.
  • the weight ratio of the ternary oxide and the binary oxide is preferably included in a ratio of 9: 1 to 1: 9, more preferably 9: 1 to 3: 7, and even more preferably 7: 3 to 4. : 6.
  • a sintered body that is easy to be cut can be produced both in the initial stage of cutting and in long-term cutting.
  • the alloy powder is added to promote bonding between the iron-based powders and to increase the strength of the sintered body after sintering.
  • Such an alloy powder is preferably contained in an amount of 0.1 wt% or more and 10 wt% or less with respect to the entire mixed powder for iron-based powder metallurgy. When it is 0.1% by weight or more, the strength of the sintered body can be increased, and when it is 10% by weight or less, dimensional accuracy during sintering of the sintered body can be ensured.
  • alloy powder examples include non-ferrous metal powders such as copper (Cu) powder, nickel (Ni) powder, Mo powder, Cr powder, V powder, Si powder, and Mn powder, and cuprous oxide powder. You may use individually by 1 type and may use 2 or more types together.
  • the lubricant is added in order to make it easy to take out the molded body obtained by compressing the mixed powder for iron-based powder metallurgy in the mold. That is, when a lubricant is added to the mixed powder for iron-based powder metallurgy, it is possible to reduce the drawing pressure when taking out the molded body from the mold, and to prevent cracking of the molded body and damage to the mold.
  • the lubricant may be added to the iron-based powder metallurgy mixed powder, or may be applied to the surface of the mold.
  • the lubricant When the lubricant is added to the iron-based powder metallurgy mixed powder, the lubricant is preferably contained in an amount of 0.01% by weight or more, and 0.1% by weight or more, based on the weight of the iron-based powder metallurgy mixed powder. More preferably. When the content of the lubricant is 0.01% by weight or more, it is easy to obtain the effect of reducing the punching pressure of the sintered body.
  • the lubricant is preferably contained in an amount of 1.5% by weight or less, more preferably 1.2% by weight or less, based on the weight of the mixed powder for iron-based powder metallurgy. When the content of the lubricant is 1.5% by weight or less, it is easy to obtain a high-density sintered body and a high-strength sintered body can be obtained.
  • the lubricant is selected from the group consisting of metal soap (lithium stearate, calcium stearate, zinc stearate, etc.), stearic acid monoamide, fatty acid amide, amide wax, hydrocarbon wax, and cross-linked (meth) acrylic acid alkyl ester resin.
  • metal soap lithium stearate, calcium stearate, zinc stearate, etc.
  • stearic acid monoamide fatty acid amide
  • amide wax hydrocarbon wax
  • cross-linked (meth) acrylic acid alkyl ester resin one or more of them can be used.
  • the binder is added to adhere the alloy powder and the graphite powder to the surface of the iron-based powder.
  • a butene polymer a methacrylic acid polymer, or the like is used.
  • the butene polymer it is preferable to use a 1-butene homopolymer composed of butene alone or a copolymer of butene and alkene.
  • the alkene here is preferably a lower alkene, preferably ethylene or propylene.
  • the methacrylic acid polymer is selected from the group consisting of methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, ethyl hexyl methacrylate, lauryl methacrylate, methyl acrylate and ethyl acrylate 1 More than seeds can be used.
  • the binder is preferably contained in an amount of 0.01% by weight or more, more preferably 0.05% by weight or more, and further preferably 0.1% by weight or more, based on the weight of the mixed powder for iron-based powder metallurgy. It is included.
  • the binder content is preferably 0.5% by weight or less, more preferably 0.4% by weight or less, and still more preferably 0.8% by weight or less with respect to the weight of the mixed powder for iron-based powder metallurgy. 3% by weight or less.
  • the machining accelerator is added in order to improve the machinability of the sintered body obtained by sintering the mixed powder for iron-based powder metallurgy. It is preferable to use calcium sulfide as the machining accelerator.
  • calcium sulfide is used as a machining accelerator, calcium sulfide is hygroscopic and may impair the stability of the performance. Therefore, the surface of the powder made of calcium sulfide is coated, or the powder of calcium sulfide is preliminarily 300 It is preferably heated to from °C to 900 °C to form II type calcium sulfate.
  • the hygroscopic property of the powder made of calcium sulfide can be suppressed, and the performance of the sintered body can be stabilized.
  • the type II calcium sulfate has extremely low hygroscopicity, the performance of the sintered body can be stabilized.
  • an amide polymer material, an organic material such as styrene / butadiene rubber, or the like can be used for the coating of the powder made of calcium sulfide.
  • the machining accelerator is preferably contained in an amount of 0.01% by weight or more, more preferably 0.05% by weight or more, more preferably 0.1% by weight based on the weight of the mixed powder for iron-based powder metallurgy. It is contained by weight% or more.
  • the content of the machining accelerator is preferably 1% by weight or less, more preferably 0.4% by weight or less, and still more preferably 0.3% by weight with respect to the weight of the mixed powder for iron-based powder metallurgy. % By weight or less.
  • the mixed powder for iron-based powder metallurgy of the present invention can be produced by mixing iron-based powder, ternary oxide, and binary oxide using, for example, a mechanical stirring mixer.
  • various additives such as alloy powders, graphite powders, lubricants and binders may be added as appropriate.
  • the mechanical stirring mixer include a high speed mixer, a nauter mixer, a V-type mixer, and a double cone blender.
  • the order of mixing the powders is not particularly limited.
  • the mixing temperature is not particularly limited, but is preferably 150 ° C. or lower from the viewpoint of suppressing oxidation of the iron-based powder in the mixing step.
  • a compacted body After the mixed powder for iron-based powder metallurgy prepared above is filled in a mold, a compacted body can be manufactured by applying a pressure of 300 MPa to 1200 MPa.
  • the molding temperature at this time is preferably 25 ° C. or higher and 150 ° C. or lower.
  • the sintered compact is obtained by sintering the compacting body produced above by a normal sintering method.
  • the sintering condition may be a non-oxidizing atmosphere or a reducing atmosphere.
  • the green compact is preferably sintered for 5 minutes to 60 minutes at a temperature of 1000 ° C. to 1300 ° C. in an atmosphere such as a nitrogen atmosphere, a mixed atmosphere of nitrogen and hydrogen, and a hydrocarbon.
  • the sintered body produced as described above can be used as machine parts such as automobiles, agricultural equipment, electric tools, and home appliances by processing with various tools such as cutting tools as necessary.
  • cutting tools include a drill, an end mill, a milling cutting tool, a turning cutting tool, a reamer, and a tap.
  • the iron-based powder metallurgy mixed powder contains a binary oxide, whereby a sintered body having excellent machinability at the initial cutting stage can be obtained. Moreover, when the mixed powder for iron-based powder metallurgy contains a ternary oxide, a sintered body excellent in machinability in long-term cutting can be obtained. When the total weight of the binary oxide and the ternary oxide is in the above range, the machinability in the initial stage of cutting and the machinability in long-term cutting can be made highly compatible.
  • the mixed powder for iron-based powder metallurgy includes a ternary oxide and a binary oxide in a weight ratio of 9: 1 to 1: 9. Good balance of machinability.
  • the mixed powder for iron-based powder metallurgy contains ternary oxides and binary oxides in a total weight of 0.05% by weight to 0.2% by weight.
  • a sintered body having an excellent balance of machinability can be produced.
  • Examples 1 to 6 and Comparative Examples 1 to 6) In each of the examples and comparative examples, 2% by weight of copper powder (product name: CuATW-250 (Fukuda Metal Foil Powder Industrial Co., Ltd.) with respect to pure iron powder (product name: Atmel 300M (manufactured by Kobe Steel)) Made by the company)), and the composition and weight% of binary oxide and / or ternary oxide shown in the column of “binary oxide” and / or “ternary oxide” in Table 1, A mixed powder for iron-based powder metallurgy was prepared by mixing graphite powder (product name CPB (manufactured by Nippon Graphite Industry Co., Ltd.)) and 0.75 wt% zinc stearate. The graphite powder was added in an amount such that the amount of carbon after sintering was 0.75% by weight. As the binary oxide and ternary oxide, those having a volume average particle diameter of 2 ⁇ m were used.
  • the above mixed powder for iron-based powder metallurgy was filled in a mold, and a test piece was molded in a ring shape having an outer diameter of 64 mm, an inner diameter of 24 mm, and a thickness of 20 mm so that the molding density was 7.00 g / cm 3 .
  • This ring-shaped test piece was sintered at 1130 ° C. for 30 minutes in a 10% by volume H 2 —N 2 atmosphere to produce a sintered body.
  • Examples 1 to 6 are sintered bodies containing a combination of a binary oxide and a ternary oxide.
  • Comparative Example 1 is a sintered body containing neither binary oxide nor ternary oxide.
  • Comparative Examples 3 and 4 are sintered bodies containing only ternary oxides.
  • Comparative Examples 2, 5, and 6 are sintered bodies containing only binary oxides.
  • Comparative Example 2 the component (CaO.Al 2 O 3 ) disclosed in Patent Document 1 is used.
  • Comparative Example 3 the component (2CaO ⁇ MgO ⁇ 2SiO 2 ) disclosed in Patent Document 3 is used.
  • Comparative Example 4 the component (2CaO.Al 2 O 3 .SiO 2 ) disclosed in Patent Document 4 is used.
  • Example 7 to 18 In Examples 7 to 18, the total weight of the binary oxide and the ternary oxide was fixed to 0.1% by weight, and the weight ratio and composition thereof were set to “binary oxide” and “ A mixed powder and sintered body for iron-based powder metallurgy were prepared in the same manner as in Example 1 except that the composition and weight% shown in the column of “ternary oxide” were changed. The amount of tool wear was evaluated in the same manner as in Example 1 for the sintered body thus produced. These results are shown in Table 2 below.
  • Example 19 to 21 and Comparative Examples 7 to 9 In Examples 19 to 21 and Comparative Examples 7 to 9, the weights of the binary oxide and the ternary oxide are shown in the columns of “binary oxide” and “ternary oxide” in Table 3.
  • a mixed powder and sintered body for iron-based powder metallurgy were produced in the same manner as in Example 1 except that the composition and weight percentage were changed. The amount of wear was evaluated for the sintered body thus produced by the same method as in Example 1. These results are shown in Table 3 below.

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  • Powder Metallurgy (AREA)

Abstract

Le mélange de poudres pour métallurgie des poudres à base de fer de l'invention contient : au moins une sorte d'oxyde ternaire choisie dans un groupe constitué d'un oxyde à base de Ca-Al-Si et d'un oxyde à base de Ca-Mg-Si ; et au moins une sorte d'oxyde binaire choisie dans un groupe constitué d'un oxyde à base de Ca-Al et d'un oxyde à base de Ca-Si. Ce mélange de poudres pour métallurgie des poudres à base de fer contient en quantité totale 0,025% en masse ou plus à 0,3% en masse ou moins dudit oxyde ternaire et dudit oxyde binaire.
PCT/JP2016/063170 2015-05-27 2016-04-27 Mélange de poudres pour métallurgie des poudres à base de fer, corps fritté fabriqué à l'aide de celui-ci WO2016190039A1 (fr)

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CN201680029929.4A CN107614157B (zh) 2015-05-27 2016-04-27 铁基粉末冶金用混合粉和使用其制作的烧结体
US15/569,008 US20180126454A1 (en) 2015-05-27 2016-04-27 Mixed powder for iron-based powder metallurgy and sintered body produced using same
EP16799747.7A EP3305440B1 (fr) 2015-05-27 2016-04-27 Mélange de poudres pour métallurgie des poudres à base de fer, corps fritté fabriqué à l'aide de celui-ci
KR1020177036354A KR20180008733A (ko) 2015-05-27 2016-04-27 철기 분말 야금용 혼합 분말 및 그것을 이용하여 제작한 소결체
KR1020197025709A KR102060955B1 (ko) 2015-05-27 2016-04-27 철기 분말 야금용 혼합 분말 및 그것을 이용하여 제작한 소결체

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JP2015-107346 2015-05-27
JP2015107346A JP6480264B2 (ja) 2015-05-27 2015-05-27 鉄基粉末冶金用混合粉及び焼結体

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EP3214192B1 (fr) * 2016-02-08 2018-12-26 Sumitomo Electric Industries, Ltd. Corps fritté à base de fer
JP6929259B2 (ja) * 2018-01-25 2021-09-01 株式会社神戸製鋼所 粉末冶金用混合粉
MX2020007821A (es) * 2018-01-25 2020-09-25 Kobe Steel Ltd Polvo mixto para pulvimetalurgia.

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JP6480264B2 (ja) 2019-03-06
CN107614157A (zh) 2018-01-19
EP3305440A1 (fr) 2018-04-11
US20180126454A1 (en) 2018-05-10
KR20190104455A (ko) 2019-09-09
JP2016222942A (ja) 2016-12-28
EP3305440B1 (fr) 2020-09-09
KR102060955B1 (ko) 2019-12-31
KR20180008733A (ko) 2018-01-24
CN107614157B (zh) 2019-07-05

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