WO2005102565A1 - Sintered metal parts and method for the manufacturing thereof - Google Patents
Sintered metal parts and method for the manufacturing thereof Download PDFInfo
- Publication number
- WO2005102565A1 WO2005102565A1 PCT/SE2005/000563 SE2005000563W WO2005102565A1 WO 2005102565 A1 WO2005102565 A1 WO 2005102565A1 SE 2005000563 W SE2005000563 W SE 2005000563W WO 2005102565 A1 WO2005102565 A1 WO 2005102565A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder
- sintered
- iron
- density
- silane
- Prior art date
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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
-
- 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
-
- 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
-
- 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
- B22F3/02—Compacting only
- B22F2003/023—Lubricant mixed with the metal 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
- 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
- B22F3/16—Both compacting and sintering in successive or repeated steps
- B22F3/164—Partial deformation or calibration
- B22F2003/166—Surface calibration, blasting, burnishing, sizing, coining
-
- 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
Definitions
- the invention relates to powder metal parts. Specifically the invention concerns sintered metal parts which have a densified surface and which are suitable for demanding applications. The invention also includes a method of preparing these metal parts.
- the US 5 711 187 (1990) is particularly concerned with the degree of surface hardness, which is necessary in order to produce gear wheels which are sufficiently wear resistant for use in heavy duty applications .
- the surface hardness or densification should be in the range of 90 to 100 percent of full theoretical density to a depth of at least 380 microns and up to 1,000 microns.
- No specific details are disclosed concerning the production process but it is stated that admixed powders are preferred as they have the advantage of being more compressible, enabling higher densities to be reached at the compaction stage.
- the admixed powders should include in addition to iron and 0.2% by weight of graphite, 0.5% by weight of molybdenum, chromium and manganese, respectively.
- the US 5 552 109 (1995) patent concerns a process of forming a sintered article having high density.
- the patent is particularly concerned with the production of connecting rods.
- the powder should be a pre-alloyed iron based powder, that the compacting should be performed in a single step, that the compaction pressures may vary between 25 and 50 ton per square inch (390-770 MPa) to green densities between 6.8 and 7.1 g/cm 3 and that the sintering should be performed at high temperature, particularly between 1270 and 1350°C.
- sintered products having a density greater than 7.4 g/cm 3 are obtained and it is thus obvious that the high sintered density is a result of the high temperature sintering .
- the surface densification of sintered PM steels is dis- cussed in e.g. the Technical Paper Series 820234, (International Congress & Exposition, Detroit, Michigan, February 22-26, 1982) .
- Technical Paper Series 820234 International Congress & Exposition, Detroit, Michigan, February 22-26, 1982.
- Fe-Cu-C and Ni-Mo alloyed materials were used for the study.
- the paper re- veals the results from basic research on the surface rolling of sintered parts at a density of 6.6 and 7.1 g/cm 3 and the application of it to sintered gears.
- the basic studies includes surface rolling with different diameters of the rolls, best results in terms of strength were achieved with smaller roll diameter, lesser reduction per pass and large total reduction.
- powder metal parts in more demanding applications can be obtained by subjecting an iron or iron-based powder to unaxially compaction at a pressure above 700 MPa to a density above 7.35 g/cm 3 , sintering the obtained green product and subjecting the sintered product to a densification process.
- a characteristic feature of the core of the metal part according to the invention is the pore structure, which is distinguished by comparatively large pores.
- the invention concerns a sintered metal part which has a densified surface and a core density of at least 7.35, preferably at least 7.45 g/cm 3 wherein the core structure is distinguished by a pore matrix obtained by single pressing, without applying die wall lubrication, to at least 7.35 g/cm 3 , preferably at least 7.45 g/cm 3 , and single sintering of an iron-based powder mixture having coarse iron or iron-based powder particles as well as the method of producing such metal parts.
- the pore structure was measured an evaluated by using image analysis according to ASTM E 1245 giving the pore area distribution related to pore size.
- the density levels above concerns products based on pure or low-alloyed iron powder .
- Suitable metal powders which can be used as starting materials for the compaction process are powders prepared from metals such as iron. Alloying elements such as carbon, chromium, manganese, molybdenum, copper, nickel, phosphorous, sulphur etc can be added as particles, prealloyed or diffusion alloyed in order to modify the properties of the final sintering product.
- the iron-based powders can be selected from the group consisting of substantially pure iron powders, pre-alloyed iron-based particles, diffusion alloyed iron-based iron particles and mixture of iron particles or iron-based particles and alloying elements. As regards the particle shape it is preferred that the particles have an irregular form as is obtained by water atomisation. Also sponge iron powders having irregularly shaped particles may be of interest.
- pre alloyed water atomised powders including low amounts such as up to 5% of one or more of the alloying elements Mo and Cr.
- powders having a chemical composition corresponding to the chemical composition of Astaloy Mo (1.5% Mo and Astaloy 85 Mo (0.85% Mo) as well as Astaloy CrM (3 Cr,0.5 Mo) and Astaloy CrL (1.5 Cr,0.2 Mo) from Hoganas AB, Sweden.
- a critical feature of the invention is that the powder used have coarse particles i.e. the powder is essentially without fine particles.
- the term "essentially without fine particles” is intended to mean that less than about 10%, preferably less than 5% of the powder particles have a size below 45 ⁇ m as measured by the method described in SS-EN 24 497.
- the average particle diameter is typically between 75 and 300 ⁇ m.
- the amount of particles above 212 ⁇ m is typically above 20%.
- the maximum particle size may be about 2 mm.
- the size of the iron-based particles normally used within the PM industry is distributed according to a gaussian distribution curve with a average particle diameter in the region of 30 to 100 ⁇ m and about 10-30% of the particles are less than 45 ⁇ m.
- the powders used according to the present invention have a particle size distribution deviating from that normally used. These powders may be obtained by removing the finer fractions of the powder or by manufacturing a powder having the desired particle size distribution.
- a suitable particle size distribution for a powder having a chemical composition corresponding to the chemical composition of Astaloy 85 Mo could be that at most 5% of the particles should be less than 45 ⁇ m and the average particle diameter is typically between 106 and 300 ⁇ m.
- the corresponding values for a powder having a chemical composition corresponding to Astaloy CrL are suitably that less than 5% should be less than 45 ⁇ m and the average particle diameter is typically between 106 and 212 ⁇ m.
- graphite in amounts between 0.1-1, preferably 0.2-1.0, more preferably 0.2-0.7% and most preferably 0.2-0.5% by weight of the total mixture to be compacted could be added before the compaction. However, for certain applications graphite addition is not necessary.
- the iron-base powder may also be combined with a lubricant before it is transferred to the die (internal lubrication) .
- the lubricant is added in order to minimize friction between the metal power particles and between the particles and the die during a compaction, or pressing, step.
- suitable lubricants are e.g. stearates, waxes, fatty acids and derivatives thereof, oligomers, polymers and other organic substances with lubricating effect.
- the lubricants may be added in the form of particles but may also be bonded and/or coated to the particles.
- a lubricating coating of a silane compound of the type disclosed in WO 2004/037467 is included in the powder mixture.
- the silane compound may be an alkylakoxy or polyetheralkoxy silane, wherein the alkyl group of the alkylalkoxy silane and the polyether chain of the polyetheralkoxy silane include between 8 and 30 carbon atoms, and the alkoxi group includes 1-3 carbon atoms .
- Examples of such compounds are octyl-tri-metoxy silane, hexadecyl-tri-metoxy silane and polyethyleneether-trimetoxy silane with 10 ethylene ether groups .
- the amount of lubricant added to the iron-based powder may vary between 0.05 and 0.6%, preferably between 0.1-0.5% by weight of the mixture .
- binding agents As optional additives hard phases, binding agents, machinability enhancing agents and flow enhancing agents may be added.
- the compaction may be performed with standard equipment, which means that the new method may be performed without expensive investments.
- the compaction is performed uni- axially in a single step at ambient or elevated temperature.
- the compaction pressures are above about 700, more preferably above 800 and most preferably above 900 or even 1000 MPa.
- the compaction should preferably be performed to densities above 7.45 g/cm 3 .
- Any conventional sintering furnace may be used and the sintering times may vary between about 15 and 60 minutes.
- the atmosphere of the sintering furnace may be an endogas atmosphere, a mixture between hydrogen and nitrogen or in vacuum.
- the sintering temperatures may vary between 1100 and 1350°C. With sintering temperatures above about 1250°C the best results are obtained.
- the method according to the present invention has the advantage that one pressing step and one sintering step are eliminated and still sintered densities above 7.64 g/cm 3 can be obtained.
- a distinguishing feature of the core of the high density green and sintered metal part is the presence of large pores.
- at least about 50% of the pore area consists of pores having a pore area of at least 100 ⁇ m 2
- at least about 50% of the pore area consists of pores having a pore area of about 65 ⁇ m 2 .
- the surface densification may be performed by radial or axial rolling, shoot peening, sizing etc.
- a preferred method is radial rolling as this method provides short cycle times in combination with great densification depth.
- the powder metal parts will obtain better mechanical properties with increasing densifying depth.
- the densification depth is preferably at least 0.1 mm, preferably at least 0.2 mm and most preferably at least 0.3 mm.
- the bending fatigue strength of samples produced of these powders will surprisingly reach the same level as that of surface densified samples which are produced from powders having a normal particle size distribution (given the same chemical composition and the same sintered density level) . Accordingly, as high sintered density can be reached in a single pressing, single sintering process, costly processes, such as double pressing- double sintering, warm compaction, can be avoided by utilising the method according to the present invention for production of for example gear wheels.
- Fig 1 shows the bending fatigue strength before and after the surface densification process of samples produced from the mixes 1A and IB according to example 1.
- Fig 2 is a light optical micrograph of a cross section of a surface densified sample prepared from mix 1A.
- Fig 3 is a light optical micrograph of a cross section of a surface densified sample prepared from mix IB.
- Fig 4 shows the bending fatigue strength before and after surface densification process of samples produced from the mixes 2C and 2D according to example 2.
- Fig 5 is a light optical micrograph of a cross section of a surface densified sample prepared from mix 2C.
- Fig 6 is a light optical micrograph of a cross section of a surface densified sample prepared from mix 2D.
- Powder A The following iron-based powders were used; Powder A;
- Astaloy 85 Mo an atomised pre-alloyed iron base powder with a Mo content of 0.80-0.95%, a carbon content of at most 0.02% and an oxygen content of at most 0.20%.
- the particle sized distribution of powder A is similar to the particle size distribution for powder normally used in powder metallurgy; about 0% greater than 250 ⁇ m, about 15-25% between 150 and 250 ⁇ m and about 15 to 30% less than 45 ⁇ m.
- Powder B The same chemical composition as powder A but with a coarser particle size distribution according to the table below;
- Powder C Astaloy CrL, an atomised Mo-, Cr- prealloyed iron based powder with a Cr content of 1.35-1.65%, a Mo content of 0.17-0.27%, a carbon content of at most 0.010% and an oxygen content of at most 0.25%.
- the particle sized distribution of powder C is similar to the particle size distribution for powder normally used in powder metallurgy; about 0% greater than 250 ⁇ m, about 15-25% between 150 and 212 ⁇ and about 10 to 25% less than 45 ⁇ m.
- Powder D The same chemical composition as powder C but with a coarser particle size distribution according to the table below;
- Example 1 Two mixes, Mix 1A and Mix IB were prepared by thoroughly mixing before compaction.
- Mix 1A was based on powder A with an addition of 0.2% by weight of graphite and 0.8% by weight of H wax.
- Mix IB was based on powder B with an addition of 0,2% by weight of graphite and 0.2% by weight of hexadecyl trime- toxy silane.
- Test bars based on Mix 1A was compacted to a green density of 7.1 g/cm 3 and pre sintered at 780°C for 30 min- utes in an atmosphere of 90% nitrogen and 10% hydrogen. After sintering the samples were subjected to a second compaction at a pressure of 1100 MPa and finally sintered at 1280°C for 30 minutes in an atmosphere of 90% nitrogen and 10% of hydrogen. The sintered density was measured to 7.61 g/cm 3 .
- the sample prepared from mix IB was compacted in a single compaction process at 1100 MPa was subsequently sintered at 1280°C for 30 minutes in an atmosphere of 90% nitrogen and 10% of hydrogen.
- the sintered density was 7.67 g/cm 3 .
- Half of the number of the obtained sintered bodies was subjected to a surface densifaction process by shot peening at 6 bars air pressure with steel spheres with a diameter of 0.4 mm.
- Figure 2 is a light optical micrograph showing a cross section of a surface densified sample prepared from mix
- figure 3 is a similar micrograph from a surface densified sample prepared from mix IB.
- Image analysis according to ASTM E 1245 of cross section of surface densified samples produced from sample 1A shows that about 50% of the total cross section pore area consists of pores having a surface area of 65 ⁇ m 2 or more, whereas the same measuring of surface densified samples produced from mix IB shows that about 50% of the total cross section area consists of pores having a surface area of 200 ⁇ m or more.
- Mix 2C was based on powder C with an addition of 0.7% of nickel powder, 0.2% by weight of graphite and 0.8% by weight of H wax
- Mix 2D was based on powder D with an addition of 0.7% of nickel powder 0.2% of graphite and 0.2% of hexadecyl trimetoxy silane.
- Test bars based on mix 2C was compacted to a green density of 7.1 g/cm 3 and pre sintered at 780°C for 30 minutes in an atmosphere of 90% nitrogen and 10% hydrogen. After sintering the samples were subjected to a second compaction at a pressure of 1100 MPa and finally sintered at 1280°C for 30 minutes in an atmosphere of 90% nitrogen and 10% of hydrogen. The sintered density was measured to
- Test bars prepared from mix 2D was compacted in a single compaction process at 1100 MPa followed by sintering 1280°C for 30 minutes in an atmosphere of 90% nitrogen and 10% of hydrogen. The sintered density was measured to
- Figure 5 shows the bending fatigue limit for both the surface densified samples and the samples which were not subjected to surface densification.
- Figure 6 is a light optical micrograph showing a cross section of a surface densified sample prepared from mix
- figure 7 is a similar micrograph from a surface densified sample prepared from mixture 2D.
- Image analysis according to ASTM E 1245 of cross section of surface densified samples produced from sample 2C shows that about 50% of the total cross section pore area consists of pores having a surface area of 50 ⁇ m 2 or more, whereas the same measuring of surface densfied samples produced from mix 2D shows that about 50% of the total cross section area consists of pores having a surface area of 110 ⁇ m 2 or more.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
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Abstract
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Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002563621A CA2563621C (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
MXPA06012183A MXPA06012183A (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof. |
AT05733730T ATE471779T1 (en) | 2004-04-21 | 2005-04-20 | SINTERED METAL PARTS AND PRODUCTION PROCESS THEREOF |
CN2005800124728A CN1946500B (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
DE602005021964T DE602005021964D1 (en) | 2004-04-21 | 2005-04-20 | SINTERED METAL PARTS AND MANUFACTURING METHOD THEREFOR |
AU2005235503A AU2005235503B2 (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
EP05733730A EP1740332B1 (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
PL05733730T PL1740332T3 (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
JP2007509419A JP4887287B2 (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and manufacturing method thereof |
BRPI0510000-3A BRPI0510000A (en) | 2004-04-21 | 2005-04-20 | sintered metal parts and their production method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0401041A SE0401041D0 (en) | 2004-04-21 | 2004-04-21 | Sintered metal parts and method of manufacturing thereof |
SE0401041-9 | 2004-04-21 |
Publications (1)
Publication Number | Publication Date |
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WO2005102565A1 true WO2005102565A1 (en) | 2005-11-03 |
Family
ID=32322642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2005/000563 WO2005102565A1 (en) | 2004-04-21 | 2005-04-20 | Sintered metal parts and method for the manufacturing thereof |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP1740332B1 (en) |
JP (2) | JP4887287B2 (en) |
KR (1) | KR100841162B1 (en) |
CN (1) | CN1946500B (en) |
AT (1) | ATE471779T1 (en) |
AU (1) | AU2005235503B2 (en) |
BR (1) | BRPI0510000A (en) |
CA (1) | CA2563621C (en) |
DE (1) | DE602005021964D1 (en) |
ES (1) | ES2347803T3 (en) |
MX (1) | MXPA06012183A (en) |
PL (1) | PL1740332T3 (en) |
RU (1) | RU2343042C2 (en) |
SE (1) | SE0401041D0 (en) |
TW (1) | TWI285140B (en) |
WO (1) | WO2005102565A1 (en) |
ZA (1) | ZA200608030B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005113178A2 (en) * | 2004-05-12 | 2005-12-01 | Höganäs Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
US7384445B2 (en) | 2004-04-21 | 2008-06-10 | Höganäs Ab | Sintered metal parts and method for the manufacturing thereof |
EP3441161A4 (en) * | 2016-04-07 | 2019-02-13 | Sumitomo Electric Industries, Ltd. | Method for manufacturing sintered compact, and sintered compact |
US11685979B2 (en) | 2016-03-23 | 2023-06-27 | Höganäs Ab (Publ) | Iron based powder |
Families Citing this family (16)
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JP5110398B2 (en) * | 2009-06-05 | 2012-12-26 | トヨタ自動車株式会社 | Iron-based sintered alloy, method for producing iron-based sintered alloy, and connecting rod |
RU2445188C2 (en) * | 2009-12-28 | 2012-03-20 | Открытое акционерное общество "Русполимет" | Method of producing articles from steel granules by powder metallurgy procedure with uniform distribution of nitrogen on article volume |
WO2011152774A1 (en) * | 2010-06-04 | 2011-12-08 | Höganäs Ab (Publ) | Nitrided sintered steels |
US8469003B2 (en) * | 2010-09-10 | 2013-06-25 | Burgess • Norton Mfg. Co., Inc. | Fuel injector clamp |
EP2659014B1 (en) * | 2010-12-30 | 2017-04-05 | Höganäs AB (publ) | Iron based powders for powder injection molding |
KR101929081B1 (en) * | 2011-09-07 | 2018-12-13 | 바스프 에스이 | Binders and processes for producing metallic or ceramic moldings in powder injection molding |
CN103008662B (en) * | 2011-09-23 | 2015-06-03 | 复盛应用科技股份有限公司 | Integrally forming method for compound metals |
JP5929320B2 (en) * | 2012-03-01 | 2016-06-01 | Jfeスチール株式会社 | Alloy steel powder for powder metallurgy and method for producing alloy steel powder for powder metallurgy |
WO2013136983A1 (en) * | 2012-03-12 | 2013-09-19 | Ntn株式会社 | Mechanical structural component, sintered gear, and methods for producing same |
JP5936954B2 (en) * | 2012-08-23 | 2016-06-22 | Ntn株式会社 | Manufacturing method of machine parts |
CN102896315B (en) * | 2012-09-15 | 2015-04-01 | 安徽省怀远县尚冠模具科技有限公司 | Method for manufacturing top board of die |
KR20180041343A (en) | 2016-10-14 | 2018-04-24 | 주식회사 엘지화학 | Preparation method for metal alloy foam |
CN108500277A (en) * | 2018-03-28 | 2018-09-07 | 上海汽车粉末冶金有限公司 | A kind of preparation method of powder metallurgy surface densified parts |
CN109967746A (en) * | 2019-04-06 | 2019-07-05 | 苏州中鼎冶金有限公司 | A kind of manufacturing method and powder metallurgical gear of powder metallurgical gear |
DE112019007667T5 (en) * | 2019-08-30 | 2022-06-15 | Sumitomo Electric Industries, Ltd. | Sintered material and method of making sintered material |
CN110788332A (en) * | 2019-11-29 | 2020-02-14 | 济南市博瀚精工机械有限公司 | Powder metallurgy eccentric wheel for atomizer compression pump and preparation method thereof |
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JPH03130349A (en) * | 1989-06-24 | 1991-06-04 | Sumitomo Electric Ind Ltd | Ferrous sintered parts material excellent in fatigue strength and its production |
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US5729822A (en) * | 1996-05-24 | 1998-03-17 | Stackpole Limited | Gears |
SE9602376D0 (en) * | 1996-06-14 | 1996-06-14 | Hoeganaes Ab | Compact body |
WO2000062960A1 (en) * | 1999-04-16 | 2000-10-26 | Unisia Jecs Corporation | Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof |
SE0002448D0 (en) * | 2000-06-28 | 2000-06-28 | Hoeganaes Ab | method of producing powder metal components |
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2004
- 2004-04-21 SE SE0401041A patent/SE0401041D0/en unknown
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2005
- 2005-04-20 AT AT05733730T patent/ATE471779T1/en active
- 2005-04-20 WO PCT/SE2005/000563 patent/WO2005102565A1/en active Application Filing
- 2005-04-20 ES ES05733730T patent/ES2347803T3/en active Active
- 2005-04-20 RU RU2006140982/02A patent/RU2343042C2/en not_active IP Right Cessation
- 2005-04-20 CA CA002563621A patent/CA2563621C/en not_active Expired - Fee Related
- 2005-04-20 DE DE602005021964T patent/DE602005021964D1/en active Active
- 2005-04-20 BR BRPI0510000-3A patent/BRPI0510000A/en not_active Application Discontinuation
- 2005-04-20 MX MXPA06012183A patent/MXPA06012183A/en active IP Right Grant
- 2005-04-20 ZA ZA200608030A patent/ZA200608030B/en unknown
- 2005-04-20 AU AU2005235503A patent/AU2005235503B2/en not_active Ceased
- 2005-04-20 KR KR1020067024241A patent/KR100841162B1/en active IP Right Grant
- 2005-04-20 JP JP2007509419A patent/JP4887287B2/en not_active Expired - Fee Related
- 2005-04-20 PL PL05733730T patent/PL1740332T3/en unknown
- 2005-04-20 EP EP05733730A patent/EP1740332B1/en not_active Not-in-force
- 2005-04-20 CN CN2005800124728A patent/CN1946500B/en not_active Expired - Fee Related
- 2005-04-21 TW TW094112753A patent/TWI285140B/en not_active IP Right Cessation
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2010
- 2010-05-24 JP JP2010118037A patent/JP2010202980A/en active Pending
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US7393498B2 (en) | 2004-04-21 | 2008-07-01 | Hoganas Ab | Sintered metal parts and method for the manufacturing thereof |
WO2005113178A2 (en) * | 2004-05-12 | 2005-12-01 | Höganäs Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
WO2005113178A3 (en) * | 2004-05-12 | 2006-02-02 | Hoeganaes Ab | Iron-based gear wheels produced by a process comprising uniaxially compacting, sintering and surface densifying |
US11685979B2 (en) | 2016-03-23 | 2023-06-27 | Höganäs Ab (Publ) | Iron based powder |
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Also Published As
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CN1946500A (en) | 2007-04-11 |
ES2347803T3 (en) | 2010-11-04 |
AU2005235503A1 (en) | 2005-11-03 |
KR20060134220A (en) | 2006-12-27 |
KR100841162B1 (en) | 2008-06-24 |
ZA200608030B (en) | 2008-07-30 |
JP2007533857A (en) | 2007-11-22 |
EP1740332A1 (en) | 2007-01-10 |
DE602005021964D1 (en) | 2010-08-05 |
MXPA06012183A (en) | 2007-01-17 |
JP2010202980A (en) | 2010-09-16 |
PL1740332T3 (en) | 2010-11-30 |
TW200539971A (en) | 2005-12-16 |
RU2343042C2 (en) | 2009-01-10 |
TWI285140B (en) | 2007-08-11 |
EP1740332B1 (en) | 2010-06-23 |
RU2006140982A (en) | 2008-05-27 |
AU2005235503B2 (en) | 2008-07-17 |
JP4887287B2 (en) | 2012-02-29 |
CA2563621C (en) | 2009-09-29 |
ATE471779T1 (en) | 2010-07-15 |
SE0401041D0 (en) | 2004-04-21 |
CN1946500B (en) | 2010-05-26 |
BRPI0510000A (en) | 2007-09-18 |
CA2563621A1 (en) | 2005-11-03 |
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