CN1647874A - Method to make sinter-hardened powder metal parts with complex shapes - Google Patents

Method to make sinter-hardened powder metal parts with complex shapes Download PDF

Info

Publication number
CN1647874A
CN1647874A CNA2005100518454A CN200510051845A CN1647874A CN 1647874 A CN1647874 A CN 1647874A CN A2005100518454 A CNA2005100518454 A CN A2005100518454A CN 200510051845 A CN200510051845 A CN 200510051845A CN 1647874 A CN1647874 A CN 1647874A
Authority
CN
China
Prior art keywords
weight
briquetting
grinding
powder
parts
Prior art date
Application number
CNA2005100518454A
Other languages
Chinese (zh)
Inventor
K·徐
R·孙
Original Assignee
博格华纳公司
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 to US10/766154 priority Critical
Priority to US10/766,154 priority patent/US20050163645A1/en
Application filed by 博格华纳公司 filed Critical 博格华纳公司
Publication of CN1647874A publication Critical patent/CN1647874A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12Both compacting and sintering
    • B22F3/16Both compacting and sintering in successive or repeated steps
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or stucture
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02Details
    • H01H13/26Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • B22F2003/247Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • B22F2003/248Thermal after-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2998/00Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10Processes characterised by the sequence of their steps
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00Layers
    • H01H2209/02UV or light sensitive

Abstract

A method of producing parts from powdered metals is disclosed, comprising the following steps. A metallurgical powder is provided, consisting of iron, 0.3-1.0 weight percent carbon, 0-4 weight percent chromium, 0-3 weight percent copper, 0.5-1.5 weight percent molybdenum, 0.5-4.5 weight percent nickel, 0-1.0 weight percent manganese, and 0-1.5 weight percent silicon. Metal powders are made by atomization and mixing. The powder metal parts are made by compacting, pre-sintering, profile/form grinding, sinter furnace hardening, and secondary operations. Profile/form grinding generates profiles, which can not be formed by compaction tooling, such as undercut. The specific pre-sinter cycle makes parts strong enough for profile grinding with prolonged tool life. Powder metal parts made by this invention are also disclosed.

Description

A kind of preparation has the method for the sinter-hardening powder metalwork of complicated shape
Technical field
The present invention relates to field of metallurgy, more precisely, the present invention relates to from metallurgical powder manufactured materials method, this metallurgical powder comprises iron, carbon, nickel, molybdenum and a kind of composition of being made up of chromium, copper, manganese and silicon.
Background technology
Sinter-hardened is a kind of technology that is used to produce the material of high martensite content, and this technology does not adopt traditional Technology for Heating Processing, solidifies as box heat treatment or induction.This sinter-hardened technology comprises following step: under hot conditions briquetting is carried out sintering, at the end cool off this briquetting rapidly to form martensite in the sintering furnace sclerosis then.
The process that much is used to produce the sinter-hardening powder metalwork has all obtained patent, and these processes all comprise this operation of presintering.
The presintering metallurgical material is disclosed in the patent (US4595556) that people such as Umeha obtained the authorization on June 17th, 1986 " a kind of technology of producing camshaft ".And people such as Umeha disclose a kind of method of producing the parts that are fit to be installed to camshaft.After the presintering step, can before sinter-hardened, these parts be installed on the axle rightly.The briquetting of this briquetting after than presintering is axially short 50%.
The patent (US5049183) " sintered mechanical part and method " that people such as Saka obtained the authorization on September 17th, 1991 discloses method like the physiognomies such as a kind of and Umeha, and wherein, presintering makes the accuracy of product size higher.Briquetting is suppressed through after the presintering again.This method is particularly useful for producing the axle center of the sychronisation of motorcycle.
The patent (US5659873) that Seyrkammer obtained the authorization on August 19th, 1997 " a kind of production is used to connect the method for the cam of camshaft " also discloses a kind of method that comprises the presintering step.This method is to be used to produce a kind of cam that is used to connect camshaft.The presintering operation allows cam to be manufactured required profile again, but this profile may be changed in quenching and tempering stage.
The patent (US5659955) that Plamper obtained the authorization on August 26th, 1997 " the helical gear method of a kind of metal that makes powder ", adopt presintering to produce the powdered-metal blank, this blank obtains having the helical gear of axial angle greater than 35 degree by cold rolling production.And the metal dust pressing process of standard can not be used for the bigger helical gear of production axial angle.
People such as Shivanath also disclose in the patent (US5729822) " gear " of obtaining the authorization on March 17th, 1998 gear have been carried out presintering, gear is finally heated in vacuum drying oven with carburizing before, it is rolled.The travelling gear that this method can be produced has the hard durable top layer, and hard, the core of anti-fracture, the flexibility maximization that travelling gear be can bear.
People such as Shivanath have described a kind of technology that the high density parts are shaped in the patent (U85881354) " high-density sintered and forming technology " of obtaining the authorization on March 9th, 1999, wherein the briquetting of presintering has carried out spheroidising before secondary heat treatment.The nodularization step comprises and adds hot wafering and briquetting is carried out pressure-sizing or mold pressing.Thereby this technology can reduce the endurance that the surface oxidation degree improves sintered component.
At last, people such as Cadle disclose in the patent (US6148685) " duplex of sprocket/gear and manufacture method thereof " of obtaining the authorization on November 21st, 2000 and have adopted two kinds of metallurgical powder mixtures to come the production sprocket, a kind of mixture is used for tooth portion, and another kind is used for main body.These two kinds of powder metallurgies have the performance that adapts to the requirement of finished product local function.Sintered body can carry out machined.
Aspect engine and transmission application, some sprocket have many toothrows, and this can not obtain by simple compacting.Need carry out secondary machine, the heat treatment after the machined is induction hardening or box heat treatment normally.Though prior art makes the powdered metal parts moulding by comprising the presintering step with limited mode, this area still needs a kind of effective method with the more complicated powdered metal parts of production shape.
Summary of the invention
This disclosure of the Invention a kind of method of producing parts from powdered-metal, may further comprise the steps.A kind of metallurgical powder is provided, and it is by iron, 0.3-1.0 weight % carbon, and 0-4 weight % chromium, 0-3 weight % copper, 0.5-1.5 weight % molybdenum, 0.5-4.5 weight % nickel, 0-1.0 weight % manganese and 0-1.5 weight % silicon are formed.Metal dust is made by metal dusting and mixing.Powder metal component passes through compacting, presintering, and profile/form grinding, sintering furnace sclerosis and secondary operations are made.Profile/form grinding is to form profile, and this can not form by press process such as undercutting.It is enough soft again simultaneously so that thereby easy grinding prolongs the life-span of grinding tool to bear form grinding that the specific presintering cycle makes parts have enough intensity.The powdered metal parts of making by this invention is also disclosed.
Description of drawings
Fig. 1 is for making the process chart of the sinter-hardened metal parts with complex appearance.
The specific embodiment
Metal dust is by efflorescence and be mixed and made into.This granular materials is by iron, 0.3-1.0 weight % carbon, and 0-4 weight % chromium, 0-3 weight % copper, 0.5-1.5 weight % molybdenum, 0.5-4.5 weight % nickel, 0-1.0 weight % manganese and 0-1.5 weight % silicon constitute.Table 1 has been listed each components contents scope of this granular materials.This powder has good sinter-hardened performance.
Table 1: each the constituent content scope that is used to form the metallurgical powder of complicated shape
Element Iron Carbon Chromium Copper Molybdenum Nickel Manganese Silicon
New powder Surplus 0.3-1.0 ??0-4 ??0-3 ??0.5-1.5 ??0.5-4.5 ??0-1.0 ??0-1.5
Process chart as shown in Figure 1.Metallurgical powder is pressed (1) under the pressure of 30-65 ton/square inch, green density is 6.5-7.25g/cm 3Green component is to carry out presintering (2) under 1400-2000 °F in temperature.The presintering time is 20-60 minute.For making different microstructures such as pearlite, ferrite+pearlite and bainite, cooling velocity is that 10/min to 120/min does not wait.When cooling velocity during, formation is difficult to mach martensite greater than 120/min.(10/min) mainly obtain the pearlite microstructure of slower cooling velocities.The nodularization pearlite is suitable for machined most.Briquetting cool to room temperature or near room temperature.Temperature and cooling velocity by control presintering can obtain accurate microstructure.Presintering can make powder metal component obtain to bear the intensity of profile/form grinding (3).The specific presintering cycle also can make the pellet hardness in the parts reduce, and is used for the life-span of the grinding tool of profile/form grinding step with prolongation.
Profile/form grinding utilizes superabrasive tool to form profile and concrete geometric profile.This technology is also referred to as superfinishing processing (SAM).After presintering, adopt profile/moulding to grind producing various complicated shapes such as many toothrows and undercutting tooth, and this is to be difficult to make by traditional powdered-metal drawing method and single-point machined.The complexity of shape only is subject to the size and the accuracy of profile and profile equipment for grinding.
After the grinding, parts carry out sintering furnace sclerosis (4).The sintering furnace curing condition is as follows: sintering temperature is 2000-2400 °F, and sintering time is 20-80 minute, and cooling velocity is 120-450/min.Last heat treatment makes to contain in the final powdered metal parts and surpasses 90% martensite, and a spot of retained austenite, pearlite, and bainite.Tempering, deburring and other secondary operations (5) can be selected to adopt according to final performance need.
The present invention is hardened (4) before at profile/form grinding (3) and sintering furnace, adopts the special presintering cycle (2).The presintering part has that enough intensity is born profile/form grinding and can be broken or cracked.In a single operation, utilize profile/form grinding (SAM) to process profile and concrete geometric shape.This method allows to use littler pressure of the sintered part more general than grinding and bigger charging rate to carry out profile/form grinding.The problem that the present invention is brought in the time of can avoiding simultaneously the powdered metal parts of grinding sclerosis.
Embodiment: the double-stranded gear of the powdered-metal that uses in the gearbox
Double-stranded gear has two toothrows, has a phase angle between two toothrows.The design of double-stranded gear is disclosed in the patent (US5427580) " chain component of phasing " of obtaining the authorization June 27 nineteen ninety-five people such as Ledvina.This sprocket is the part in the chain drive system, and this chain drive system is the front-wheel drive transmission that is used for automobile.The advantage of double-stranded gear is to reduce noise in the running.The consideration of material development aspect comprises hardness/wear resistance and good hardenability.
In one embodiment of the invention, will comprise iron, 2 weight % copper, 0.8 weight % carbon, 1.4 weight % nickel, the material of 1.25 weight % molybdenums and 0.42 weight % manganese was suppressed with 45 tons/square inch pressure, 1650 presintering 30 minutes.Parts after the presintering cool off with the speed of 25/min.Then, with the wheel grinding parts of superhard shaping,, a ditch is arranged in the middle of two toothrows to produce two toothrows.Behind profile/form grinding, parts carry out 30 minutes sintering furnace sclerosis under 2070 temperature conditions.After the sintering furnace sclerosis, parts cool off with the speed of 150/min.Carry out the such secondary operations of deburring then.
Therefore, be appreciated that the specific embodiment described here only is the illustrative application of the principle of the invention.Involved details is as the restriction of claim scope in the present embodiment, and the described feature of claim itself can be considered essential place of the present invention.

Claims (11)

1, a kind of method of producing parts by powdered-metal comprises following steps:
A) provide a kind of metallurgical powder, it comprises: iron, 0.3-1.0 weight % carbon, 0-4.0 weight % chromium, 0-3.0 weight % copper, 0.5-1.5 weight % molybdenum, 0.5-4.5 weight % nickel, 0-1.0 weight % manganese and 0-1.5 weight % silicon, and percentage by weight is that calculate on the basis with the total weight of powder;
B) with the pressure of 30-65 ton/square inch this metallurgical powder is suppressed so that briquetting to be provided;
C) briquetting is heated to 1400-2000 °F, heated 20-60 minute;
D) cool off briquetting with the speed of 10-120/min;
E) the grinding briquetting is to produce concrete geometric jacquard patterning unit surface profile;
F) briquetting is heated to 2000-2400 °F, heated 20-80 minute; With
G) cool off briquetting with the speed of 120-450/min.
2, the described method of claim 1, wherein said parts are sprocket.
3, the described method of claim 2, the tooth density of wherein said sprocket is 6.7g/cc to 7.2g/cc.
4, the described method of claim 1, wherein said metallurgical powder is pressed in step b), and forming density is the briquetting of 6.5g/cc-7.25g/cc.
5, the described method of claim 1, wherein said briquetting cools off in step d), so that its microstructure is mainly pearlite, ferrite+pearlite or bainite.
6, the described method of claim 1 is form grinding or contour grinding in the grinding described in the step d) wherein.
7, the described method of claim 1 wherein is ground at the briquetting described in the step e), is selected from zigzag, tooth root undercut and conical surfaces geometry with formation.
8, the described method of claim 1, wherein this method also comprises another step after step g), is about to briquetting and is heated to 300-1000 °F, be 30-90 minute heat time heating time.
9, the described method of claim 8, the briquetting that wherein makes are that microstructure contains greater than 90% martensite, 0-3% pearlite and retained austenite less than 7% tempering briquetting.
10, a kind of method by the powdered-metal manufacture component comprises following steps:
A) provide a kind of metallurgical powder, it comprises: iron, and 0.8 weight % carbon, 2.0 weight % copper, 1.25 weight % molybdenums, 1.4 weight % nickel and 0.42 weight % manganese, percentage by weight are that calculate on the basis with the total weight of powder;
B) under 45 tons/square inch pressure, suppress this metallurgical powder to form briquetting;
C) add hot wafering to 1650, be 30 minutes heat time heating time;
D) with the speed of 25/min briquetting is cooled off;
E) the grinding briquetting to be forming two toothrows, and has one ditch in the middle of two toothrows;
F) add hot wafering to 2070, be 30 minutes heat time heating time, and
G) with the speed of 150/min briquetting is cooled off.
11, the described method of claim 10, wherein said parts are sprocket.
CNA2005100518454A 2004-01-28 2005-01-27 Method to make sinter-hardened powder metal parts with complex shapes CN1647874A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/766154 2004-01-28
US10/766,154 US20050163645A1 (en) 2004-01-28 2004-01-28 Method to make sinter-hardened powder metal parts with complex shapes

Publications (1)

Publication Number Publication Date
CN1647874A true CN1647874A (en) 2005-08-03

Family

ID=34679330

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2005100518454A CN1647874A (en) 2004-01-28 2005-01-27 Method to make sinter-hardened powder metal parts with complex shapes

Country Status (5)

Country Link
US (1) US20050163645A1 (en)
EP (1) EP1561832A1 (en)
JP (1) JP2005213649A (en)
KR (1) KR20050077492A (en)
CN (1) CN1647874A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078732A (en) * 2009-11-26 2011-06-01 刘柏谦 Irregular multi-size uniform fluctuation grain bed
CN102162070A (en) * 2011-03-30 2011-08-24 中南大学 Connecting rod material for engines in powder metallurgy and preparation method thereof
CN101479063B (en) * 2006-06-28 2011-12-07 浦项工科大学校产学协力团 Fabrication method of alloy parts by metal injection molding and the alloy parts
CN102654187A (en) * 2011-03-04 2012-09-05 自贡市富源车辆部件有限公司 High-precision low-cost machining method for transmission chain wheel of oil pump
CN102654186A (en) * 2011-03-04 2012-09-05 自贡市富源车辆部件有限公司 Method for machining transmission chain wheel of oil pump
CN102748281A (en) * 2012-06-15 2012-10-24 扬州保来得科技实业有限公司 Oil pump rotor used for VVT technology and its preparation method
CN103600065A (en) * 2013-10-14 2014-02-26 富莱茵汽车部件有限公司 Powder metallurgy gear and manufacturing method thereof
CN103890210A (en) * 2011-10-21 2014-06-25 浦项工科大学校产学协力团 Iron-based alloy for powder injection molding
CN104815979A (en) * 2014-01-31 2015-08-05 精工爱普生株式会社 Manufacturing method of compact, manufacturing method of structure, and cutting processed material
CN105339517A (en) * 2013-06-27 2016-02-17 罗伯特·博世有限公司 Method for producing a steel shaped body
CN106868419A (en) * 2017-03-17 2017-06-20 江苏智造新材有限公司 Powder metallurgy matter automatic gearbox of vehicles parking gear and preparation method thereof
CN108838395A (en) * 2013-03-25 2018-11-20 日立化成株式会社 Fe base sintered alloy and preparation method thereof
CN110666176A (en) * 2019-09-27 2020-01-10 无锡市恒特力金属制品有限公司 Manufacturing method and application of powder metallurgy gear with enhanced torsion and crushing strength

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4789837B2 (en) * 2007-03-22 2011-10-12 トヨタ自動車株式会社 Iron-based sintered body and manufacturing method thereof
JP6227871B2 (en) 2010-02-15 2017-11-08 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーFederal−Mogul Llc Master alloy for producing sintered hardened steel parts and process for producing sintered hardened parts
KR101360422B1 (en) * 2011-12-08 2014-02-11 기아자동차주식회사 Scissors gear structure and manufacturing method thereof
KR101405845B1 (en) * 2012-08-10 2014-06-11 기아자동차주식회사 Method for manufacturing of valve train parts using with metal powder injection molding
KR20140048428A (en) * 2012-10-15 2014-04-24 현대자동차주식회사 Method for manufacturing of control finger using with metal powder injection molding
CN103182510A (en) * 2013-03-07 2013-07-03 兴城市粉末冶金有限公司 Processing technology for powder metallurgy gear hub
CN104368816B (en) * 2013-08-14 2016-12-28 东睦新材料集团股份有限公司 A kind of manufacture method of iron-based powder metallurgy parts
CN104827036A (en) * 2015-05-11 2015-08-12 东睦新材料集团股份有限公司 Preparation method of iron-based powder metallurgical part
DE102015112322A1 (en) * 2015-07-28 2017-02-02 Hoerbiger Antriebstechnik Holding Gmbh Method for producing a synchronizer ring and synchronizer ring
CN105624557A (en) * 2016-02-22 2016-06-01 桐乡市搏腾贸易有限公司 Mechanical transmission chain wheel and manufacturing method thereof

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054449A (en) * 1970-12-04 1977-10-18 Federal-Mogul Corporation Process of making a composite heavy-duty powdered machine element
US3791800A (en) * 1971-02-03 1974-02-12 Amsted Ind Inc Powder metallurgy aluminum parts
US3992763A (en) * 1974-09-13 1976-11-23 Federal-Mogul Corporation Method of making powdered metal parts
US4006016A (en) * 1975-07-23 1977-02-01 Borg-Warner Corporation Production of high density powdered metal parts
US4165243A (en) * 1978-05-31 1979-08-21 Federal-Mogul Corporation Method of making selectively carburized forged powder metal parts
JPS60149703A (en) * 1984-01-12 1985-08-07 Nippon Piston Ring Co Ltd Production of cam shaft
JP2648519B2 (en) * 1989-10-03 1997-09-03 日立粉末冶金株式会社 Method of manufacturing synchronizer hub
US5080712B1 (en) * 1990-05-16 1996-10-29 Hoeganaes Corp Optimized double press-double sinter powder metallurgy method
US5427580A (en) * 1992-05-19 1995-06-27 Borg-Warner Automotive, Inc. Phased chain assemblies
WO1994013418A1 (en) * 1992-12-11 1994-06-23 Höganäs Ab Iron-based powder composition
US5659955A (en) * 1994-01-21 1997-08-26 Plamper; Gerhard Method of making powder metal helical gears
US5613180A (en) * 1994-09-30 1997-03-18 Keystone Investment Corporation High density ferrous power metal alloy
AT405916B (en) * 1995-02-16 1999-12-27 Miba Sintermetall Ag Method for producing a cam for a jointed camshaft
CA2240426C (en) * 1995-12-15 2005-05-10 Zenith Sintered Products, Inc. Duplex sprocket/gear construction and method of making same
US5881354A (en) * 1996-05-03 1999-03-09 Stackpole Limited Sintered hi-density process with forming
US5729822A (en) * 1996-05-24 1998-03-17 Stackpole Limited Gears
US6044555A (en) * 1998-05-04 2000-04-04 Keystone Powered Metal Company Method for producing fully dense powdered metal helical gear
JP3931447B2 (en) * 1998-09-18 2007-06-13 セイコーエプソン株式会社 Metal sintered body and method for producing the same
US6134786A (en) * 1999-01-29 2000-10-24 Amsted Industries Incorporated Method for improvement of involute and lead error in powder metal gears
AUPQ114899A0 (en) * 1999-06-23 1999-07-15 Kempe Project Engineers Pty. Ltd. Feed wheel
US6338747B1 (en) * 2000-08-09 2002-01-15 Keystone Investment Corporation Method for producing powder metal materials
US6592809B1 (en) * 2000-10-03 2003-07-15 Keystone Investment Corporation Method for forming powder metal gears
JP4166041B2 (en) * 2002-06-03 2008-10-15 住友電工焼結合金株式会社 Sintered sprocket and manufacturing method thereof
US20040115084A1 (en) * 2002-12-12 2004-06-17 Borgwarner Inc. Method of producing powder metal parts
AU2004221846A1 (en) * 2003-03-18 2004-09-30 The Penn State Research Foundation Method and apparatus for strengthening of powder metal gears by ausforming

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101479063B (en) * 2006-06-28 2011-12-07 浦项工科大学校产学协力团 Fabrication method of alloy parts by metal injection molding and the alloy parts
CN102078732A (en) * 2009-11-26 2011-06-01 刘柏谦 Irregular multi-size uniform fluctuation grain bed
CN102654187A (en) * 2011-03-04 2012-09-05 自贡市富源车辆部件有限公司 High-precision low-cost machining method for transmission chain wheel of oil pump
CN102654186A (en) * 2011-03-04 2012-09-05 自贡市富源车辆部件有限公司 Method for machining transmission chain wheel of oil pump
CN102162070A (en) * 2011-03-30 2011-08-24 中南大学 Connecting rod material for engines in powder metallurgy and preparation method thereof
CN103890210B (en) * 2011-10-21 2016-05-04 浦项工科大学校产学协力团 A kind of ferrous alloy for powder injection molding moulding
CN103890210A (en) * 2011-10-21 2014-06-25 浦项工科大学校产学协力团 Iron-based alloy for powder injection molding
CN102748281A (en) * 2012-06-15 2012-10-24 扬州保来得科技实业有限公司 Oil pump rotor used for VVT technology and its preparation method
CN102748281B (en) * 2012-06-15 2015-07-01 扬州保来得科技实业有限公司 Oil pump rotor used for VVT technology and its preparation method
CN108838395A (en) * 2013-03-25 2018-11-20 日立化成株式会社 Fe base sintered alloy and preparation method thereof
CN105339517A (en) * 2013-06-27 2016-02-17 罗伯特·博世有限公司 Method for producing a steel shaped body
US10220443B2 (en) 2013-06-27 2019-03-05 Robert Bosch Gmbh Method for producing a steel shaped body
CN105339517B (en) * 2013-06-27 2018-09-18 罗伯特·博世有限公司 Method for manufacturing steel formed body
CN103600065A (en) * 2013-10-14 2014-02-26 富莱茵汽车部件有限公司 Powder metallurgy gear and manufacturing method thereof
CN104815979A (en) * 2014-01-31 2015-08-05 精工爱普生株式会社 Manufacturing method of compact, manufacturing method of structure, and cutting processed material
CN104815979B (en) * 2014-01-31 2018-09-25 精工爱普生株式会社 The manufacturing method of formed body, the manufacturing method of structure and it is cut rapidoprint
CN106868419A (en) * 2017-03-17 2017-06-20 江苏智造新材有限公司 Powder metallurgy matter automatic gearbox of vehicles parking gear and preparation method thereof
CN110666176A (en) * 2019-09-27 2020-01-10 无锡市恒特力金属制品有限公司 Manufacturing method and application of powder metallurgy gear with enhanced torsion and crushing strength

Also Published As

Publication number Publication date
EP1561832A1 (en) 2005-08-10
KR20050077492A (en) 2005-08-02
US20050163645A1 (en) 2005-07-28
JP2005213649A (en) 2005-08-11

Similar Documents

Publication Publication Date Title
CN1647874A (en) Method to make sinter-hardened powder metal parts with complex shapes
US5729822A (en) Gears
CA2500918C (en) Powder metal clutch races for one-way clutches and method of manufacture
Samal et al. Powder metallurgy methods and applications
US6013225A (en) Surface densification of machine components made by powder metallurgy
CN101444845A (en) Method for producing powder metallurgy toothed sleeve
CN105014077A (en) Preparation method of powder metallurgical gear and chain wheel
CN1090067C (en) Powder metallurgical body with compacted surface
US7854995B1 (en) High density dual helical gear
CN104889403A (en) Method for manufacturing iron-based powder metallurgy components
CN101905411B (en) Method for manufacturing coupler for distributor of automobile engine
CN102000825A (en) Method for manufacturing driving gear of motorcycle clutch
CN105018824B (en) A kind of preparation method of P/M cam
CN103084576A (en) Production method of powder metallurgy hot forging connecting rod with sealed surface
CN104368816A (en) Method for manufacturing iron-based powder metallurgy components
JP2008527166A (en) Method for producing surface densified powder metal parts
CN101506398B (en) High carbon surface densified sintered steel products and method of production therefor
CN101829783A (en) Produce the method for steel moulding
CN101827675B (en) Method for obtaining forged carburized powder metal part
US8444781B1 (en) Method of strengthening metal parts through ausizing
CN104540973B (en) Mechanical part and its manufacture method
CN109695004A (en) A kind of manufacturing method of iron-based powder metallurgy parts
US7364803B1 (en) High density dual helical gear and method for manufacture thereof
CN107876752A (en) A kind of forged material cam of based powders containing molybdenum-iron and its preparation technology
CN105177414A (en) Nickel-carbon-ferrum-based powder metallurgy alloy and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication