CN104711485A - Low alloyed steel powder - Google Patents
Low alloyed steel powder Download PDFInfo
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- CN104711485A CN104711485A CN201510087406.2A CN201510087406A CN104711485A CN 104711485 A CN104711485 A CN 104711485A CN 201510087406 A CN201510087406 A CN 201510087406A CN 104711485 A CN104711485 A CN 104711485A
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- 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
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- 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
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A water atomized pre-alloyed iron-based steel powder which comprises by weight%: 0.4-2.0 Cr, 0.1-0.8 Mn, less than 0.1 V, less than 0.1 Mo, less than 0.1 Ni, less than 0.2 Cu, less than 0.1 C, less than 0.25 O, less than 0.5 of unavoidable impurities, and the balance being iron.
Description
The divisional application that the application is application number is 200880125653.5, the applying date is on December 18th, 2008, denomination of invention is the application of " low alloyed steel powder ".
Technical field
The parts that the present invention relates to low-alloy iron based powders, powder composition containing this powder and other additive and be made up of the compacting of the iron-based powder combination containing this novel low alloyed steel powder and sintering.The mechanical properties of the parts be made up of powder of the present invention is suitable with the mechanical properties of the parts be made up of more high-alloying and more expensive difference bonded powder.
Background technology
In the industry, the application of the metal product made by compacting and sintered metal powders powder composition is increasingly extensive.Produce many variant productions with different shape and thickness, and improve constantly specification of quality while hope reduces costs.Owing to obtaining clean shape parts by the compacting of iron powder composition and sintering or only needing few mechanical workout just can reach the near net-shaped parts of net shape and high material use degree, this technology is better than the conventional forming techniques of metal parts greatly, such as, be molded or mechanical workout by bar or forging.
But a problem relevant with sintering process to compacting is, sintered component contains a certain amount of hole, so that reduces the intensity of these parts.Substantially two kinds of modes are had to overcome the negative impact to mechanical properties caused by parts porousness.1) can by introducing alloying element, such as carbon, copper, nickel, molybdenum etc., improve the intensity of sintered component.2) by improving the compressibility of this powder composition and/or improving pressing pressure to obtain higher green density or to improve the shrinking percentage of these parts in sintering process, the porosity of sintered component can be reduced.In practice, adopt by add alloying element strengthen these parts with porosity is down to minimum combination.Therefore, the low alloyed steel powder of various composition and the drawing method of these comminuted steel shots become known for manufacturing the PM parts showing high strength and hardness.But the characteristic of PM parts is toughness relatively low compared with forged steel material.Although " highly " alloying, have relatively high compressible so-called diffusion alloying iron-based powder provide compared with pre-alloyed powder manufacture there is the compacting of high-tenacity and high drawing and high strength and the possibility of sintered compact.
But a shortcoming relevant to the diffusion-alloyed powder used at present is their relatively high expensive alloy element (such as molybdenum and nickel) content.Be surprised to find that now, by carefully selecting the combination of alloying element chromium and manganese, under relatively low content, obtain a kind of pre-alloyed powder, it makes to suppress and sintered compact has and uses the difference bonded powder of more alloying obtainable value par or close in the mechanical properties of extending and in intensity.
US 4266974 discloses the example at extraneous powdered alloy required for protection, its only containing manganese and chromium as the alloying element of having a mind to add.These examples contain the chromium of 2.92% and the manganese of 0.24%, the chromium of 4.79% and the manganese of 0.21 % by weight, or the chromium of 0.55% and 0.89 % by weight manganese.
In Japanese patent application publication No. JP 59173201, the reduced anneal method of the low alloyed steel powder containing chromium, manganese and molybdenum, the display of example has the chromium content of 1.14 % by weight and the Fe content of 1.44 % by weight powder as only alloying element of having a mind to add.
Chromium, manganese and molybdenum base prealloy comminuted steel shot is described in US 6348080.WO 03/106079 teaches chromium, manganese and the molybdenum alloy comminuted steel shot compared with the comminuted steel shot described in US 6348080 with lower alloying element content.This powder is adapted at forming bainite structure higher than under about carbon content of 0.4 % by weight.
Goal of the invention
The object of this invention is to provide the alloyed iron-based powder being applicable to manufacture compacting and sintered component, this powder does not contain expensive alloying element substantially, such as molybdenum and nickel.
Another object of the present invention is to provide to be formed has good elongation, tensile strength and the compacting of yield strength and the powder of sintered component.
Another object of the present invention is to provide the sintered component with above-mentioned character.
Brief summary of the invention
By following at least one achieving in these objects every:
The pre-alloyed iron-based comminuted steel shot of-water atomization, be weight %, it comprises: the Cr of 0.4 to 2.0, the Mn of 0.1 to 0.8, be less than 0.1 V, be less than 0.1 Mo, be less than 0.1 Ni, be less than 0.2 Cu, be less than 0.1 C, be less than the O of 0.25, be less than the inevitable impurity of 0.5, and surplus is iron.
-based on the iron-based powder combination of this comminuted steel shot, and its with the graphite of 0.35 to 1 % by weight of said composition, the lubricant of 0.05 to 2 % by weight of said composition and optionally maximum 3% the copper of amount, hard phase material and machinability enhancing agents mix.
The method of-manufacture sintered component, comprises the steps:
A) the described iron-based comminuted steel shot composition based on comminuted steel shot of preparation,
B) said composition is imposed to the compacting of 400 to 2000MPa,
C) in reducing atmosphere, gained green component is sintered the temperature of 1000 to 1400 DEG C,
D) optionally, forge the described parts through heating in the temperature higher than 500 DEG C, or thermal treatment or cure step are imposed to gained sintered component.
-the sintered component with perlite/ferrite microstructure made by described method.
Described comminuted steel shot has the low chromium of specifying and Fe content, and substantially not containing molybdenum, nickel and vanadium.
Detailed Description Of The Invention
the preparation of ferrous alloy comminuted steel shot
Comminuted steel shot is manufactured by the water atomization of the steel melt of the alloying element containing specified amount.Impose the reduced anneal method as described in United States Patent (USP) 6027544 to this atomized powder further, this patent is incorporated herein by this reference.The granularity of this comminuted steel shot can be any size, if its with compacting and sinter or powder forging process compatible.The example of suitable granularity is can be available from
the granularity of the known powder ABC100.30 of AB, Sweden, it is about 10 % by weight higher than 150 microns and about 20 % by weight lower than 45 microns.
the content of comminuted steel shot
Chromium is used for strengthening matrix by solution hardening.Chromium also improves the hardenability of sintered compact, oxidation-resistance and wear resistance.But the chromium content higher than 2.0 % by weight can reduce the compressibility of comminuted steel shot, and cause more difficult formation ferrite/perlite microstructure.Preferably, from compressible angle, maximum level is about 1.8 % by weight, more preferably 1.5 % by weight.To required character, there is unconspicuous effect lower than the Cr content of 0.4 % by weight.Chromium content is preferably at least 0.5 % by weight.
Manganese is the same with chromium, improves the intensity of this comminuted steel shot, hardness and hardenability.Content higher than 0.8 % by weight can improve containing the formation of manganese inclusion in this comminuted steel shot, also has negative impact due to the ferrite hardness of solution hardening and raising to compressibility.Fe content is preferably lower than 0.7 % by weight, and Fe content is again more preferably less than 0.6 % by weight.If Fe content is lower than 0.1%, required character can not be obtained, in addition, can not retrieve debris be used, unless carried out particular procedure to reduce its content in steel process processed.Due to these reasons, Fe content is preferably at least 0.2 % by weight, more preferably 0.3 % by weight.Therefore, Fe content should be 0.1 to 0.8 % by weight, preferably 0.2 to 0.7 % by weight, more more preferably 0.3 to 0.6 % by weight.
Also find, in order to obtain sufficiently high compressibility, the total amount of chromium and manganese (they can exchange to a certain extent mutually) should not be greater than 2.5 % by weight, is preferably not more than 2.3 % by weight, is most preferably not more than 2.0 % by weight.
In an embodiment of low chromium content with 0.4 to 0.6 % by weight Cr, the quite high Fe content by 0.6 to 0.8 % by weight, preferably 0.7 to 0.8 % by weight compensates low chromium content.This embodiment is favourable, because manganese is more cheap than chromium.
In another embodiment, when chromium content is at least 0.7 % by weight, Fe content is maximum 0.5 % by weight, and when chromium content is at least 1.0 % by weight, Fe content is maximum 0.4 % by weight, preferably maximum 0.3 % by weight.By having high chromium content, Fe content can keep lower, reduces the formation containing manganese inclusion in comminuted steel shot thus as far as possible.
Oxygen is maximum 0.25 % by weight suitably, to prevent from forming oxide compound with chromium and manganese---this can damage intensity and the compressibility of this powder.Due to these reasons, oxygen is preferably maximum 0.18 % by weight.
Vanadium and nickel should be less than 0.1 % by weight and copper is less than 0.2 % by weight.The too high amount of these elements has negative impact to compressibility and may raise the cost.The existence of nickel also suppresses ferrite to be formed, and facilitates crisp perlite/bainite structure thus.Molybdenum should be less than 0.1 % by weight, to prevent from forming bainite and keeping low cost, because molybdenum is very expensive alloying element.
Carbon in this comminuted steel shot should be maximum 0.1 % by weight, oxygen maximum 0.25 % by weight.Higher content unacceptably can reduce the compressibility of this powder.Due to same cause, nitrogen should be kept to less than 0.1 % by weight.
The total amount of inevitable impurity should be less than 0.5 % by weight, not damage the compressibility of this comminuted steel shot or to serve as the precursor of harmful inclusion.
iron-based powder combination
Before pressing, by iron-based comminuted steel shot and graphite and mix lubricant.Graphite adds with the amount of 0.35 to 1.0 of said composition % by weight, and lubricant adds with the amount of 0.05 to 2.0 of said composition % by weight.In certain embodiments, the copper of copper powder form can be added with maximum amount of 3 % by weight.In another embodiment, can by being blended in and being with or without additional copper powder when in said composition, add maximum nickel powder of 5 % by weight.
The amount of graphite
In order to improve intensity and the hardness of sintered component, in matrix, introduce carbon.Carbon with form of graphite with 0.35 to 1.0 of said composition % by weight amount add.The amount being less than 0.35 % by weight can cause too low intensity, and the amount higher than 1.0 % by weight can cause excessively forming carbide, thus produces too high hardness, not enough elongation and infringement machinability.If with these parts of heat treating process thermal treatment comprising carburizing after sintering or forging, the quantity of graphite of interpolation can be less than 0.35%.
The amount of copper
Copper is alloying element conventional in powder metallurgy technology.Copper can improve intensity and hardness by solution hardening.Copper also sinters the formation of neck in acceleration of sintering process, because copper melting before reaching sintering temperature, to provide the so-called liquid phase sintering more faster than solid state sintering.In a certain embodiment, copper can add with maximum amount of 3 % by weight.
The amount of nickel
Nickel is alloying element conventional in powder metallurgy technology.Nickel can improve intensity and hardness by solution hardening.Nickel also strengthens sintering neck in sintering process.In a certain embodiment, nickel can add with maximum amount of 5 % by weight.
The amount of lubricant
The release that lubricant is beneficial to compacting and this pressed part is added in said composition.Add the lubricant being less than 0.05 % by weight of said composition and there is unconspicuous effect, add the too low density that can cause press body higher than 2 % by weight of said composition.Lubricant can be selected from metallic stearate, wax, lipid acid and derivative thereof, has the oligopolymer of lubrication, polymkeric substance and other organism.
Other material
Other material can be added, such as hard phase material and machinability enhancing agents, such as MnS, MoS
2, CaF
2, different types of mineral etc.
sintering
This iron-based powder combination is transferred in mould, and the pressing pressure imposing about 400 to 2000MPa is to higher than the green density of about 6.75 grams/cc.By gained green component further in reducing atmosphere at about 1000 to 1400 DEG C, the temperature of preferably approximately 1100 to 1300 DEG C sintering.
rear sintering processes
Can thermal treatment be passed through, comprise and cooling with controlled rate of cooling, process of setting is imposed to obtain required microstructure to this sintered component.This hardening process can comprise currently known methods, such as surface hardening, nitrogenize, induction hardening etc.When thermal treatment comprises carburizing, the quantity of graphite of interpolation can be less than 0.35%.
Or, forging operation can be imposed to reach theoretical density to this sintered component.When part temperatures is about 500 to 1400 DEG C, forging operation can directly be carried out after sintering operation, or carries out after the cooling of sintered component, then before forging operation, this cooling-part is reheated the temperature to about 500 to 1400 DEG C.
Can use the rear sintering processes of other type, such as surperficial rolling or shot peening, it introduces compressive residual stress to improve fatigue lifetime.
make the character of parts
The invention provides the new iron-based pre-alloyed powder for the manufacture of sintered component, this sintered component has the tensile strength suitable with the analog value obtained by the difference bonded powder containing higher alloying element total amount and more expensive alloying element (such as nickel and molybdenum) and elongation.Invention particularly provides chromium and the pre-alloyed iron-based powder of manganese, composition containing this powder and the compacting of being made up of this powder composition and sintered component.This compacting and sintered component show higher than the stretch value of 2% and the yield strength of about 500 MPa.This microstructure is perlite or perlite/ferrite.
Embodiment
Various pre-alloyed iron-based comminuted steel shot 1 to 5 is manufactured by the water atomization of steel melt.By the undressed powder of gained further in nitrogen atmosphere 1160 DEG C of annealing, then gentle grinding is to make the disintegration of sintered powder block.Powder size is lower than 150 microns.Table 1 shows the chemical constitution of different powder.Powder 6 is DISTALOY AB, can be available from
sweden based on the business diffusion-alloyed powder of high-purity atomized powder ASC100.29 (pure iron).
Table 1
Table 1 shows the chemical constitution of comminuted steel shot of the present invention and reference material.
By gained comminuted steel shot 1 to 5 be respectively said composition 0.5 % by weight and 0.7 % by weight can be available from available from the graphite UF4 and 0.8% of Kropfm ü hle, Germany
the Amide wax PM of AB, Sweden mixes.
Powder 4, outside boundary of the present invention, with 0.11 % by weight vanadium alloying, and has the Fe content of 0.03 % by weight.The Fe content of powder 5 and chromium content are all lower than boundary of the present invention.
Reference mixture (powder 6) based on DISTALOY AB is also preferred.In this case, the composition made contains the graphite of 0.5% and the Amide Wax PM of 0.8%.
Gained powder composition is transferred in die head, and compacting forms tension test bar under the pressing pressure of 600MPa.By the test bar of this compacting in the laboratory belt furnace of 1120 DEG C in the atmosphere of 90% nitrogen and 10% hydrogen sintering 30 minutes further.
Tensile strength and the elongation of this sintered sample is tested, according to EN ISO6507-1 tested for hardness HV10 according to ASTME9-89C.Also the carbon of analytic sample and oxygen level.
Impact energy is tested according to EN10045-1.
Following table 2 show graphite addition, from chemico-analytic result and the result coming self stretch and hardness test.
Table 2
Table 2 shows the quantity of graphite of adding in said composition, the analysis C of sample made and O content and from the tension test of the sample made and the result of hardness test.
When adding 0.7% graphite, the sample based on powder 1,2 shows in yield strength, tensile strength, elongation and hardness and the DISTALOY AB that mixes with 0.5% Graphite Powder 99 quite or is better worth.Impact energy is lower slightly, but still enough high, and powder 1 is slightly better than powder 2.
When adding 0.5% graphite, based on powder 3 sample yield strength, tensile strength, elongation and in show and the DISTALOY AB that mixes with 0.5% Graphite Powder 99 quite or is better worth.Impact energy and hardness are also suitable with DISTALOY AB.
For the sample based on powder 4, under suitable tensile strength, extend and impact energy far below the value of DISTALOY AB.For the sample based on powder 5, can find out, impact energy and elongation improve along with carbon content and reduce, if add much higher graphite tensile strength to be increased to the level suitable with DISTALOY AB, then lower.
Claims (21)
1. the pre-alloyed iron-based comminuted steel shot of water atomization, be weight %, it comprises:
The Cr of 0.4 to 2.0,
The Mn of 0.1 to 0.8,
Be less than the V of 0.1,
Be less than the Mo of 0.1,
Be less than the Ni of 0.1,
Be less than the Cu of 0.2,
Be less than the C of 0.1,
Be less than the O of 0.25,
Be less than the inevitable impurity of 0.5, and
Surplus is iron.
2. the pre-alloyed iron-based comminuted steel shot of water atomization according to claim 1, wherein Cr content is maximum 1.8 % by weight, preferably maximum 1.5 % by weight.
3., according to the pre-alloyed iron-based comminuted steel shot of the water atomization of claim 1 or 2, wherein Cr content is at least 0.5 % by weight.
4., according to the pre-alloyed iron-based comminuted steel shot of the water atomization of any one of claims 1 to 3, wherein the content of Mn is at least 0.2 % by weight, preferably at least 0.3 % by weight.
5., according to the pre-alloyed iron-based comminuted steel shot of the water atomization of any one of Claims 1-4, wherein the content of Mn is maximum 0.7 % by weight, preferably maximum 0.6 % by weight.
6., according to the pre-alloyed iron-based comminuted steel shot of the water atomization of any one of claim 1 to 5, wherein the summation of chromium and Fe content is less than 2.5 % by weight, is preferably less than 2.3 % by weight, is most preferably less than 1.9 % by weight.
7. the pre-alloyed iron-based comminuted steel shot of water atomization according to claim 1, wherein Cr content is 0.4 to 0.6 % by weight, and Mn content is 0.6 to 0.8 % by weight, Mn content is preferably 0.7 to 0.8 % by weight.
8. the pre-alloyed iron-based comminuted steel shot of water atomization according to claim 1, wherein Cr content is at least 0.7 % by weight, and Mn content is maximum 0.5 % by weight.
9. the pre-alloyed iron-based comminuted steel shot of water atomization according to claim 1, wherein Cr content is at least 1.0 % by weight, and Mn content is maximum 0.4 % by weight, preferably maximum 0.3 % by weight.
10. iron-based powder combination, it comprises the pre-alloyed iron-based comminuted steel shot with the water atomization of following material mixing: the copper of the amount of the graphite of 0.35 to 1 % by weight of said composition, the lubricant of 0.05 to 2 % by weight of said composition, optionally maximum 3% and optionally hard phase material and machinability enhancing agents
Wherein be weight %, the pre-alloyed iron-based comminuted steel shot of described water atomization comprises:
The Cr of 0.4 to 2.0,
The Mn of 0.1 to 0.8,
Be less than the V of 0.1,
Be less than the Mo of 0.1,
Be less than the Ni of 0.1,
Be less than the Cu of 0.2,
Be less than the C of 0.1,
Be less than the O of 0.25,
Be less than the inevitable impurity of 0.5, and
Surplus is iron.
11. iron-based powder combinations according to claim 10, wherein Cr content is maximum 1.8 % by weight, preferably maximum 1.5 % by weight.
12. according to the iron-based powder combination of claim 10 or 11, and wherein Cr content is at least 0.5 % by weight.
13. according to claim 10 to the iron-based powder combination of 12 any one, and wherein the content of Mn is at least 0.2 % by weight, and preferably at least 0.3 % by weight.
14. according to claim 10 to the iron-based powder combination of 13 any one, and wherein the content of Mn is maximum 0.7 % by weight, and preferably maximum 0.6 % by weight.
15. according to claim 10 to the iron-based powder combination of 14 any one, and wherein the summation of chromium and Fe content is less than 2.5 % by weight, is preferably less than 2.3 % by weight, is most preferably less than 1.9 % by weight.
16. according to the iron-based powder combination of claim 10 or 11, and wherein Cr content is 0.4 to 0.6 % by weight, Mn content be 0.6 to 0.8 % by weight, Mn content is 0.7 to 0.8 % by weight.
17. according to the iron-based powder combination of claim 10 or 11, and wherein Cr content is at least 0.7 % by weight, Mn content is maximum 0.5 % by weight.
18. according to the iron-based powder combination of claim 10 or 11, and wherein Cr content is at least 1.0 % by weight, Mn content is maximum 0.4 % by weight, preferably maximum 0.3 % by weight.
19. according to claim 10 to the iron-based powder combination of 14 any one, and the amount of the graphite wherein mixed with the pre-alloyed iron-based comminuted steel shot of described water atomization is at least 0.5 % by weight of said composition, and more preferably at least 0.7 % by weight.
The method of 20. manufacture sintered components, comprises the steps:
A) preparation has the iron-based powder combination of the composition described in any one of claim 10 to 19,
B) said composition is imposed to the compacting of 400 to 2000MPa,
C) in reducing atmosphere, gained green component is sintered the temperature of 1000 to 1400 DEG C,
D) optionally, forge the described parts through heating in the temperature higher than 500 DEG C, or thermal treatment or cure step are imposed to gained sintered component.
21. sintered components, it is made up of the powder composition according to claim 10 to 19 any one, has perlite/ferrite microstructure.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1703807P | 2007-12-27 | 2007-12-27 | |
| SE0702892 | 2007-12-27 | ||
| SE0702892-1 | 2007-12-27 | ||
| US61/017,038 | 2007-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801256535A Division CN101925683A (en) | 2007-12-27 | 2008-12-18 | Low alloyed steel powder |
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| CN104711485A true CN104711485A (en) | 2015-06-17 |
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| CN2008801256535A Pending CN101925683A (en) | 2007-12-27 | 2008-12-18 | Low alloyed steel powder |
| CN201510087406.2A Pending CN104711485A (en) | 2007-12-27 | 2008-12-18 | Low alloyed steel powder |
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| US (1) | US20100316521A1 (en) |
| EP (1) | EP2231891A4 (en) |
| JP (2) | JP2011508091A (en) |
| KR (1) | KR20100108407A (en) |
| CN (2) | CN101925683A (en) |
| BR (1) | BRPI0821850A2 (en) |
| CA (1) | CA2710513A1 (en) |
| RU (1) | RU2482208C2 (en) |
| TW (1) | TWI441927B (en) |
| WO (1) | WO2009085001A1 (en) |
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| CN104711472A (en) | 2007-12-27 | 2015-06-17 | 霍加纳斯股份有限公司 | Low alloyed steel powder |
| US20130136646A1 (en) * | 2010-06-04 | 2013-05-30 | Hoganas Ab (Publ) | Nitrided sintered steels |
| KR102543070B1 (en) | 2015-02-03 | 2023-06-12 | 회가내스 아베 (피유비엘) | Powdered metal compositions for easy machining |
| WO2017051541A1 (en) * | 2015-09-24 | 2017-03-30 | Ｊｆｅスチール株式会社 | Method for manufacturing alloy steel powder for sintered member raw material |
| WO2017056509A1 (en) * | 2015-09-30 | 2017-04-06 | Ｊｆｅスチール株式会社 | Production method for alloy steel powder for powder metallurgy |
| KR102288887B1 (en) * | 2017-04-10 | 2021-08-12 | 현대자동차주식회사 | Method of manufacturing iron powder and iron powder manufactured thereby |
| WO2021100613A1 (en) | 2019-11-18 | 2021-05-27 | Ｊｆｅスチール株式会社 | Alloy steel powder for powder metallurgy, iron-based mixed powder for powder metallurgy, and sintered body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901661A (en) * | 1972-04-06 | 1975-08-26 | Toyo Kohan Co Ltd | Prealloyed steel powder for formation of structural parts by powder forging and powder forged article for structural parts |
| US4069044A (en) * | 1976-08-06 | 1978-01-17 | Stanislaw Mocarski | Method of producing a forged article from prealloyed-premixed water atomized ferrous alloy powder |
| JPS5810962B2 (en) * | 1978-10-30 | 1983-02-28 | 川崎製鉄株式会社 | Alloy steel powder with excellent compressibility, formability and heat treatment properties |
| JPS5773155A (en) * | 1980-10-27 | 1982-05-07 | Kawasaki Steel Corp | Manufacture of iron-base sintered machine parts with high strength and wear resistance |
| JPS58107469A (en) * | 1981-12-18 | 1983-06-27 | Kawasaki Steel Corp | Preparation of high strength sintered machine parts |
| JPS58130249A (en) * | 1982-01-28 | 1983-08-03 | Sumitomo Metal Ind Ltd | Manufacture of high-strength sintered parts |
| JPS5935602A (en) * | 1982-08-23 | 1984-02-27 | Sumitomo Metal Ind Ltd | Production of low oxygen low carbon alloy steel powder |
| JPS59173201A (en) | 1983-03-19 | 1984-10-01 | Sumitomo Metal Ind Ltd | Preparation of highly compressible alloyed steel powder |
| JPH0680164B2 (en) * | 1984-11-09 | 1994-10-12 | トヨタ自動車株式会社 | Sintered forged product manufacturing method |
| JPH07113121B2 (en) * | 1987-07-17 | 1995-12-06 | 株式会社神戸製鋼所 | Method for producing low alloy steel powder for powder metallurgy with low C and low O |
| JPH0772282B2 (en) * | 1990-10-25 | 1995-08-02 | 川崎製鉄株式会社 | High compressibility Cr alloy steel powder and method for producing high strength sintered material using the same |
| JP3396285B2 (en) * | 1994-01-31 | 2003-04-14 | 川崎製鉄株式会社 | Alloy steel powder for high-strength and high-toughness sintered materials and its sintered steel |
| EP0677591B1 (en) * | 1994-04-15 | 1999-11-24 | Kawasaki Steel Corporation | Alloy steel powders, sintered bodies and method |
| JPH08300174A (en) * | 1995-05-08 | 1996-11-19 | Sumitomo Electric Ind Ltd | Combined sintered parts and its manufacture |
| US5876481A (en) * | 1996-06-14 | 1999-03-02 | Quebec Metal Powders Limited | Low alloy steel powders for sinterhardening |
| SE9602835D0 (en) | 1996-07-22 | 1996-07-22 | Hoeganaes Ab | Process for the preparation of an iron-based powder |
| JPH1180803A (en) * | 1997-09-04 | 1999-03-26 | Kawasaki Steel Corp | Ferrous mixed powder for powder metallurgy |
| SE9800154D0 (en) * | 1998-01-21 | 1998-01-21 | Hoeganaes Ab | Steel powder for the preparation of sintered products |
| JP2000192102A (en) * | 1998-12-25 | 2000-07-11 | Kawasaki Steel Corp | Ferrous powdery mixture for powder metallurgy |
| JP3774625B2 (en) * | 2000-10-30 | 2006-05-17 | 株式会社日立製作所 | Method for forging sintered parts |
| US20030033904A1 (en) * | 2001-07-31 | 2003-02-20 | Edmond Ilia | Forged article with prealloyed powder |
| SE0201824D0 (en) | 2002-06-14 | 2002-06-14 | Hoeganaes Ab | Pre-alloyed iron based powder |
| US20060086204A1 (en) * | 2004-10-18 | 2006-04-27 | Edmond Ilia | Impact of copper and carbon on mechanical properties of iron-carbon-copper alloys for powder metal forging applications |
| JP2007284769A (en) * | 2006-04-19 | 2007-11-01 | Toyota Motor Corp | Method for manufacturing connecting rod, and connecting rod |
-
2008
- 2008-12-18 RU RU2010131156/02A patent/RU2482208C2/en not_active IP Right Cessation
- 2008-12-18 KR KR1020107016815A patent/KR20100108407A/en not_active Application Discontinuation
- 2008-12-18 JP JP2010540616A patent/JP2011508091A/en active Pending
- 2008-12-18 EP EP08866748.0A patent/EP2231891A4/en not_active Withdrawn
- 2008-12-18 CN CN2008801256535A patent/CN101925683A/en active Pending
- 2008-12-18 CA CA2710513A patent/CA2710513A1/en not_active Abandoned
- 2008-12-18 US US12/810,224 patent/US20100316521A1/en not_active Abandoned
- 2008-12-18 BR BRPI0821850A patent/BRPI0821850A2/en not_active IP Right Cessation
- 2008-12-18 WO PCT/SE2008/051511 patent/WO2009085001A1/en active Application Filing
- 2008-12-18 CN CN201510087406.2A patent/CN104711485A/en active Pending
- 2008-12-26 TW TW097151055A patent/TWI441927B/en not_active IP Right Cessation
-
2015
- 2015-01-19 JP JP2015007743A patent/JP2015108195A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA2710513A1 (en) | 2009-07-09 |
| US20100316521A1 (en) | 2010-12-16 |
| CN101925683A (en) | 2010-12-22 |
| BRPI0821850A2 (en) | 2017-06-06 |
| JP2011508091A (en) | 2011-03-10 |
| EP2231891A1 (en) | 2010-09-29 |
| TWI441927B (en) | 2014-06-21 |
| WO2009085001A1 (en) | 2009-07-09 |
| TW200942626A (en) | 2009-10-16 |
| EP2231891A4 (en) | 2017-03-29 |
| RU2010131156A (en) | 2012-02-10 |
| RU2482208C2 (en) | 2013-05-20 |
| KR20100108407A (en) | 2010-10-06 |
| JP2015108195A (en) | 2015-06-11 |
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