EP1742753B1 - Alloyed, non-oxidising metal powder - Google Patents
Alloyed, non-oxidising metal powder Download PDFInfo
- Publication number
- EP1742753B1 EP1742753B1 EP99935265A EP99935265A EP1742753B1 EP 1742753 B1 EP1742753 B1 EP 1742753B1 EP 99935265 A EP99935265 A EP 99935265A EP 99935265 A EP99935265 A EP 99935265A EP 1742753 B1 EP1742753 B1 EP 1742753B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloyed
- powder
- metal powder
- atomised
- carbide
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 title claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000002344 surface layer Substances 0.000 claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000011651 chromium Substances 0.000 claims abstract description 6
- 150000002739 metals Chemical class 0.000 claims abstract description 6
- 239000012188 paraffin wax Substances 0.000 claims abstract description 5
- -1 acyclic hydrocarbons Chemical class 0.000 claims abstract description 4
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 229910001315 Tool steel Inorganic materials 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 238000005275 alloying Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 239000010703 silicon Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000011572 manganese Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 11
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
Definitions
- the present invention relates to an atomised, non-oxidising, alloyed metal powder based on iron enriched with carbide-bound carbon in the surface layer, and also to the use of the atomised, non-oxidising, alloyed metal powder.
- metal powders are produced by means of atomising, electrolysis or through chemical or oxide reduction. Powder is used in mixtures for producing alloy compositions that are bound metallurgically upon sintering. Metallic and non-metallic powders can be combined to produce composite material having special properties.
- the powder metallurgical composition most frequently used is iron powder, which is used in the manufacture of various structured parts. Iron powder is sometimes used alone or, which is more usual, together with various additives in order to improve the mechanical properties of compacted sintered products. Powder additives include carbon, copper, nickel and molybdenum.
- US, A, 5,522,914 reveals an alloyed metal powder composed of 0.80 to 3.00 per cent by weight carbon, 0.20 to 2.00 per cent by weight manganese, 0.20 to 1.50 per cent by weight silicon, as well as 3.0 to 12.0 per cent by weight chromium, 0.20 to 0.30 per cent by weight sulphur, up to 0.04 per cent by weight phosphorous, 0.25 to 10.0 per cent by weight vanadium, up to 11.0 per cent by weight molybdenum, up to 18.00 per cent by weight mercury, up to 10 per cent by weight cobalt and up to 0.10 per cent by weight nitrogen, besides the iron.
- the oxygen content in the powder is less than 0.025 per cent by weight.
- the powder is produced by atomisation in nitrogen gas atmosphere in order to achieve a low oxygen content.
- hydrocarbon which is partially carbonised during the atomisation process.
- hydrocarbon is known through Swedish patent application 9601482-4 .
- the atomised steel powder obtained has acquired enriched carbide-bound carbon in the surface layer, and a low oxygen content.
- alloyed powder particles can be produced that include oxidation-sensitive alloying substances such as chromium, manganese, silicon.
- nitrogen gas atmosphere can be avoided since the atmosphere in the atomising equipment is saturated with vaporised or carbonised atomising medium.
- the present invention thus solves the problems of added oxygen and undesired nitrogen.
- the atomised, alloyed metal powder according to the invention is non-oxidising as well as preventing oxidation. It has improved powder-metallurgical properties such as strength and toughness.
- the carbide-bound carbon in the surface layer of the powder particles is enriched.
- the non-oxidising, alloyed metal powder in accordance with the invention is given in claim 1. It comprises oxidation-sensitive alloying metals such as chromium and manganese, besides iron and carbide-bound carbon. These alloying metals are also capable of carbide-binding carbon.
- Atomising medium used in the producion of the non-oxidising alloyed metal powder consists of hydrocarbons selected from the group comprising paraffin, diesel oils, or other cyclic or acyclic hydrocarbons that have been partially carbonised during the atomisation. Hydrogen gas is formed during the carbonisation of the hydrocarbons, as well as the carbides that are bound to the metals in the powder particles.
- the atmosphere in the atomising vessel is saturated with vaporised or carbonised atomising medium consisting of hydrocarbons and hydrogen gas. The atmosphere is thus reducing, thereby protecting the powder particles produced.
- the invention provides atomised, alloyed, non-oxidising metal powder based on iron with enriched carbide-bound carbon in the surface layer, that has been carbide-bound to the metal in the powder particles by carbonised atomising medium selected from the group comprising paraffin, diesel oils, or other cyclic or acyclic hydrocarbons during the atomising.
- the size distribution in the powder particles is 45 to 200 ⁇ m.
- Producing the atomised, alloyed, non-oxidising metal powder, based on iron with enriched carbide-bound carbon in the surface layer enables the manufacture of compacted sintered products such as toothed wheels, ball-bearings and tool steel. These products require high mechanical strength and toughness, and these properties are achieved since the alloying additives increase tempering quality and strength.
- the products are manufactured by means of conventional powder metallurgical compressing, hot compacting and sintering, hot isostatic pressing and sinter forging.
- the metal powder produced is non-oxidising and prevents oxidation it can be mixed with other powder produced from oxidation-sensitive metals. This enables the manufacture of composite material having completely new qualities.
- the present invention thus also relates to the use of the atomised, alloyed, non-oxidising metal powder as claimed in claim 1 for the manufacture of compressed, sintered products, such as toothed wheels, ball-bearings, tool steel, manufactured by means of conventional powder-metallurgical compression, hot compacting and sintering, hot isostatic compacting and sinter forging.
- alloyed, non-oxidising metal powder according to the invention was produced in accordance with the procedure described in Swedish patent application No. 9601482-4 . Paraffin was used as atomising medium in the experiments.
- An alloyed metal powder with metal carbides in the surface layer was produced having 8.0 to 10 per cent by weight chromium, 8.0 to 10 per cent by weight manganese, 0.8 to 1.2 per cent by weight carbon and the remainder iron.
- the powder produced is spherical and has a size distribution of between 45 and 200 ⁇ m.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Carbon And Carbon Compounds (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
- The present invention relates to an atomised, non-oxidising, alloyed metal powder based on iron enriched with carbide-bound carbon in the surface layer, and also to the use of the atomised, non-oxidising, alloyed metal powder.
- Most metal powders are produced by means of atomising, electrolysis or through chemical or oxide reduction. Powder is used in mixtures for producing alloy compositions that are bound metallurgically upon sintering. Metallic and non-metallic powders can be combined to produce composite material having special properties.
- The powder metallurgical composition most frequently used is iron powder, which is used in the manufacture of various structured parts. Iron powder is sometimes used alone or, which is more usual, together with various additives in order to improve the mechanical properties of compacted sintered products. Powder additives include carbon, copper, nickel and molybdenum.
-
US, A, 5,522,914 reveals an alloyed metal powder composed of 0.80 to 3.00 per cent by weight carbon, 0.20 to 2.00 per cent by weight manganese, 0.20 to 1.50 per cent by weight silicon, as well as 3.0 to 12.0 per cent by weight chromium, 0.20 to 0.30 per cent by weight sulphur, up to 0.04 per cent by weight phosphorous, 0.25 to 10.0 per cent by weight vanadium, up to 11.0 per cent by weight molybdenum, up to 18.00 per cent by weight mercury, up to 10 per cent by weight cobalt and up to 0.10 per cent by weight nitrogen, besides the iron. The oxygen content in the powder is less than 0.025 per cent by weight. The powder is produced by atomisation in nitrogen gas atmosphere in order to achieve a low oxygen content. - The problem in the production of metal powder is the oxygen content. A high oxygen content is unsuitable when metal powder is to be used for tools or other articles requiring high mechanical strength. In
US, A, 5,522,914 the problem has been solved by atomising the powder in nitrogen gas atmosphere. This is expensive and results in undesired nitrogen being included in the alloyed powder produced. - The problem of the added nitrogen is solved by using hydrocarbon which is partially carbonised during the atomisation process. Such use of hydrocarbon is known through Swedish patent application
9601482-4 - It has now surprisingly been found that oxidation can be prevented by enriching the carbide-bound carbon in the surface layer. This means that alloyed powder particles can be produced that include oxidation-sensitive alloying substances such as chromium, manganese, silicon. Furthermore, the use of nitrogen gas atmosphere can be avoided since the atmosphere in the atomising equipment is saturated with vaporised or carbonised atomising medium.
- The present invention thus solves the problems of added oxygen and undesired nitrogen. The atomised, alloyed metal powder according to the invention is non-oxidising as well as preventing oxidation. It has improved powder-metallurgical properties such as strength and toughness. The carbide-bound carbon in the surface layer of the powder particles is enriched.
- The non-oxidising, alloyed metal powder in accordance with the invention is given in claim 1. It comprises oxidation-sensitive alloying metals such as chromium and manganese, besides iron and carbide-bound carbon. These alloying metals are also capable of carbide-binding carbon.
- Atomising medium used in the producion of the non-oxidising alloyed metal powder consists of hydrocarbons selected from the group comprising paraffin, diesel oils, or other cyclic or acyclic hydrocarbons that have been partially carbonised during the atomisation. Hydrogen gas is formed during the carbonisation of the hydrocarbons, as well as the carbides that are bound to the metals in the powder particles. The atmosphere in the atomising vessel is saturated with vaporised or carbonised atomising medium consisting of hydrocarbons and hydrogen gas. The atmosphere is thus reducing, thereby protecting the powder particles produced.
- The invention provides atomised, alloyed, non-oxidising metal powder based on iron with enriched carbide-bound carbon in the surface layer, that has been carbide-bound to the metal in the powder particles by carbonised atomising medium selected from the group comprising paraffin, diesel oils, or other cyclic or acyclic hydrocarbons during the atomising.
- The size distribution in the powder particles is 45 to 200 µm.
- Producing the atomised, alloyed, non-oxidising metal powder, based on iron with enriched carbide-bound carbon in the surface layer enables the manufacture of compacted sintered products such as toothed wheels, ball-bearings and tool steel. These products require high mechanical strength and toughness, and these properties are achieved since the alloying additives increase tempering quality and strength. The products are manufactured by means of conventional powder metallurgical compressing, hot compacting and sintering, hot isostatic pressing and sinter forging.
- Since the metal powder produced is non-oxidising and prevents oxidation it can be mixed with other powder produced from oxidation-sensitive metals. This enables the manufacture of composite material having completely new qualities.
- The present invention thus also relates to the use of the atomised, alloyed, non-oxidising metal powder as claimed in claim 1 for the manufacture of compressed, sintered products, such as toothed wheels, ball-bearings, tool steel, manufactured by means of conventional powder-metallurgical compression, hot compacting and sintering, hot isostatic compacting and sinter forging.
- The present invention will be further illustrated with concrete examples which should not, however, be considered as limiting the scope of protection of the invention otherwise than as defined in the appended claims.
- In the following example, alloyed, non-oxidising metal powder according to the invention was produced in accordance with the procedure described in Swedish patent application No.
9601482-4 - An alloyed metal powder with metal carbides in the surface layer was produced having 8.0 to 10 per cent by weight chromium, 8.0 to 10 per cent by weight manganese, 0.8 to 1.2 per cent by weight carbon and the remainder iron. The powder produced is spherical and has a size distribution of between 45 and 200 µm.
Claims (3)
- An atomised, alloyed, non-oxidising metal powder based on iron enriched with carbide-bound carbon in the surface layer, that has been carbide-bound to the metals by carbonised atomised medium selected from the group comprising paraffin, diesel oils, or other cyclic or acyclic hydrocarbons characterised in that besides iron and the carbide bound carbon, the powder particles comprise 8.0-10% by weight of chromium, 8.0-10% by weight of manganese, 0.8-1.2% by weight of carbon and the remainder iron and in that the oxygen content is less than 200 ppm, and in that the particles are spherical and has a size distribution of between 45 and 200 µm.
- Use of the atomised, alloyed, non-oxidising metal powder according to claim 1 for the manufacture of compressed, sintered products such as toothed wheels, ball-bearings, tool steel, manufactured by means of conventional powder-metallurgical compression, hot compacting and sintering, hot isostatic compacting and sinter forgoing.
- Use of the atomised, alloyed, non-oxidising metal powder according to claim 1 for the manufacture of compressed, sintered alloyed products such a toothed wheels, ball-bearings, tool steel, together with iron powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP08153706A EP2163331A1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9802682A SE521053C2 (en) | 1998-08-06 | 1998-08-06 | Use of an alloy non-oxidizing metal powder |
| PCT/SE1999/001293 WO2000007759A1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08153706A Division EP2163331A1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1742753A1 EP1742753A1 (en) | 2007-01-17 |
| EP1742753B1 true EP1742753B1 (en) | 2008-07-30 |
Family
ID=20412209
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99935265A Expired - Lifetime EP1742753B1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
| EP08153706A Withdrawn EP2163331A1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08153706A Withdrawn EP2163331A1 (en) | 1998-08-06 | 1999-07-19 | Alloyed, non-oxidising metal powder |
Country Status (7)
| Country | Link |
|---|---|
| EP (2) | EP1742753B1 (en) |
| AT (1) | ATE402773T1 (en) |
| AU (1) | AU5077899A (en) |
| DE (1) | DE69939230D1 (en) |
| ES (1) | ES2310427T3 (en) |
| SE (1) | SE521053C2 (en) |
| WO (1) | WO2000007759A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100852497B1 (en) * | 2007-03-12 | 2008-08-18 | 한양대학교 산학협력단 | Corrosion-Resistant Iron-Based Alloy and Manufacturing Method Thereof |
| CN102933731B (en) * | 2010-02-15 | 2016-02-03 | 费德罗-莫格尔公司 | The manufacturing process of a kind of master alloy for the manufacture of sintering-hardened steel part and this sinter-hardened part |
| JP6229277B2 (en) | 2013-03-01 | 2017-11-15 | 日立化成株式会社 | Sintered alloy and method for producing the same |
| US11685982B2 (en) * | 2016-10-17 | 2023-06-27 | Tenneco Inc. | Free graphite containing powders |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61276949A (en) * | 1985-05-29 | 1986-12-06 | Sumitomo Metal Ind Ltd | Manufacture of sintered parts |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2220673C3 (en) * | 1972-04-27 | 1979-10-04 | Bayerisches Leichtmetallwerk Graf Bluecher Von Wahlstatt Kg, 8000 Muenchen | Metallic sintered alloys, in particular sintered steel alloys |
| US5435827A (en) * | 1991-08-07 | 1995-07-25 | Erasteel Kloster Aktiebolag | High speed steel manufactured by power metallurgy |
| US5522914A (en) * | 1993-09-27 | 1996-06-04 | Crucible Materials Corporation | Sulfur-containing powder-metallurgy tool steel article |
| SE9402672D0 (en) * | 1994-08-10 | 1994-08-10 | Hoeganaes Ab | Chromium containing materials having high tensile strength |
| SE509049C2 (en) * | 1996-04-18 | 1998-11-30 | Rutger Larsson Konsult Ab | Process and plant for the production of atomized metal powder, metal powder and use of the metal powder |
| US9302818B2 (en) * | 2011-11-22 | 2016-04-05 | Robert Beadles | Reusable envelope |
-
1998
- 1998-08-06 SE SE9802682A patent/SE521053C2/en not_active IP Right Cessation
-
1999
- 1999-07-19 AT AT99935265T patent/ATE402773T1/en not_active IP Right Cessation
- 1999-07-19 AU AU50778/99A patent/AU5077899A/en not_active Abandoned
- 1999-07-19 WO PCT/SE1999/001293 patent/WO2000007759A1/en not_active Ceased
- 1999-07-19 EP EP99935265A patent/EP1742753B1/en not_active Expired - Lifetime
- 1999-07-19 EP EP08153706A patent/EP2163331A1/en not_active Withdrawn
- 1999-07-19 ES ES99935265T patent/ES2310427T3/en not_active Expired - Lifetime
- 1999-07-19 DE DE69939230T patent/DE69939230D1/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61276949A (en) * | 1985-05-29 | 1986-12-06 | Sumitomo Metal Ind Ltd | Manufacture of sintered parts |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000007759A1 (en) | 2000-02-17 |
| SE521053C2 (en) | 2003-09-23 |
| EP1742753A1 (en) | 2007-01-17 |
| SE9802682L (en) | 2000-02-07 |
| SE9802682D0 (en) | 1998-08-06 |
| ES2310427T3 (en) | 2009-01-01 |
| AU5077899A (en) | 2000-02-28 |
| DE69939230D1 (en) | 2008-09-11 |
| EP2163331A1 (en) | 2010-03-17 |
| ATE402773T1 (en) | 2008-08-15 |
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