AU2005260139A1 - Stainless steel powder - Google Patents
Stainless steel powder Download PDFInfo
- Publication number
- AU2005260139A1 AU2005260139A1 AU2005260139A AU2005260139A AU2005260139A1 AU 2005260139 A1 AU2005260139 A1 AU 2005260139A1 AU 2005260139 A AU2005260139 A AU 2005260139A AU 2005260139 A AU2005260139 A AU 2005260139A AU 2005260139 A1 AU2005260139 A1 AU 2005260139A1
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- AU
- Australia
- Prior art keywords
- stainless steel
- steel powder
- powder
- vanadium
- sintered
- 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.)
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Classifications
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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
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
-
- 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
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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)
- Materials For Medical Uses (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention concerns a stainless steel powder and composition comprising at least 10w-t% chromium. Vanadium is present in an amount of at least 4 times the amount of carbon and nitrogen. The steel powder comprises 10-30% chromium, 0.1-1.0 vanadium, 0.5-1.5% silicon, less than 0.1% carbon and less than 0.07% nitrogen. A process for preparing a sintered part and a sintered part are also claimed.
Description
WO 2006/004529 PCT/SE2005/001086 1 STAINLESS STEEL POWDER FIELD OF THE INVENTION The present invention concerns a new stainless steel 5 powder and stainless steel powder compositions including this new powder. Specifically the invention concerns stainless steel powder compositions for manufacturing sintered powder metallurgical parts having high densities. 10 BACKGROUND OF THE INVENTION A primary goal in powder metallurgy is to achieve high density of compacted and sintered bodies. There are 15 several methods of improving density, one of those methods is warm compaction which improves the compressibility of the powder giving a green body with higher green density. By applying die wall lubrication, which makes it possible to minimise the amount of 20 internal lubricants used, the green density may also be increased. The use of high compaction pressures in combination with low amounts of lubricants also results in elevated green densities. Soft annealing of a stainless steel powder, where the material is strain 25 relieved and recrystallized, also improves the compressibility. After compaction the green body is subjected to a sintering operation in order to achieve a sintered body. High temperatures at sintering, i.e. above about 1180-1200 0 C lead to increased shrinkage during 30 sintering and higher density of the body. However, high temperature sintering requires specially equipped sintering furnaces. Additionally the energy consumption will be increased. Special problems are encountered when high density, 35 stainless steel PM parts are manufactured due to the WO 2006/004529 PCT/SE2005/001086 2 presence of chromium, which makes the steel resistant to corrosion. Stainless steels have approximately above 10% chromium. 5 Most often carbon is present in steels and will cause formation of chromium carbides. The formation of chromium carbides lowers the chromium content in the matrix, which in turn causes lower corrosion resistance. In order to avoid that the chromium content in the matrix is reduced, 10 carbide forming stabilizers, such as niobium, are often used. In this way the formation of chromium carbides can be avoided and instead niobium carbides are formed, a result of which is that the corrosion resistance can be maintained. However, a problem with the use of niobium is 15 that high sintering temperatures are necessary for obtaining high sintered densities and the energy consumption is considerable. It has now been found that, by using the new powder 20 according to the present invention, the energy costs for producing sintered stainless steel PM parts can be reduced. Another significant advantage of using the new powder is that a comparatively higher sintered density can be obtained. 25 The sintered parts manufactured by using the new powder are of particularly interest within the automotive industry where the demands on both costs and performance of the parts are high. The new powder can also be used 30 for sintered parts in exhaust systems, and especially for flanges in exhaust systems. The present invention concerns stainless steel powder, stainless steel powder compositions as well as the 35 compacted and sintered parts obtained thereof having high densities. Specifically the invention concerns stainless WO 2006/004529 PCT/SE2005/001086 3 steel powder compositions for manufacturing powder metallurgical parts. SUMMARY OF THE INVENTION 5 It has now surprisingly been found that, by adding vanadium as a stabiliser to a stainless steel powder, the sintering temperature and accordingly the energy consumption can be reduced, while the sintered density is 10 similar or even increased in comparison with the presently used niobium stabiliser. Furthermore it has been found that the vanadium should be present in an amount of at least 4 times the combined amounts of carbon and nitrogen, whereby the amount of nitrogen should be 15 less than 0.07% by weight and the amount of carbon should be less than 0.1% by weight. The amount of vanadium should be in the range of 0A-1% by weight. Stainless steel compositions including vanadium are 20 disclosed in WO 03/106077 publication and in the US patent 5 856 625. In WO 03/106077 there is not disclosed any effect or any actual examples of powders including vanadium. According to the US patent 5 856 625 the stainless steel powder preferably comprises 1.5-2.5% 25 vanadium. This known stainless steel powder is intended for materials with high wear resistance and a high carbon content is necessary to achieve a proper amount of hard carbides in the matrix formed mainly from strong carbide forming elements such as Mo, V and W. Also the patent 30 publication JP 59-47358 discloses a steel powder is comprising chromium, silicon, carbon and nitrogen. This powder may further contain nickel and/or copper and vanadium. The purpose of the the steel powder according to JP 59-47358 is to manufacture e.g. a sliding surface. 35 WO 2006/004529 PCT/SE2005/001086 4 DETAILED DESCRIPTION OF THE INVENTION Specifically, the stainless steel powder according to the invention comprises 10-30% chromium, 0.1-1% vanadium, 5 0.5-1.5% silicon, less than 0.1% carbon and less than 0.07% nitrogen. Preferably the stainless steel powder comprises 10-20% chromium, 0.15-0.8% vanadium, 0.7-1.2% silicon, less than 0.05% carbon and less than 0.05% nitrogen. 10 As the corrosion resistance in stainless steels is of great interest the vanadium content should be chosen so that vanadium carbides and nitrides are formed instead of chromium carbides and nitrides. Preferably the vanadium 15 content will be chosen in relation to the actual carbon and nitrogen content in the sintered component to be able to form vanadium carbides and nitrides. It is believed that the vanadium carbides and nitrides formed are of type VC and NC and according to our present knowledge the 20 vanadium content should preferably be minimum 4 times the carbon and nitrogen content of the powder. The actual carbon and nitrogen content in the sintered component may be higher than the content of the elements in the powder due to pick up during delubrication. 25 The amount of silicon should be between 0.5% to 1.5%. Silicon is an important element as it creates a thin coherent oxide layer during atomisation of the stainless steel melt, i.e. the silicon content should be 0.5% by 30 weight or above. The oxide layer prevents further oxidation. A too high silicon level will lead to a decrease in compressibility, hence the silicon content should be 1.5% by weight or lower. 35 The amount of nitrogen should be as low as possible as nitrogen can have the same influence as carbon, i.e. sensitising the material through formation of chromium WO 2006/004529 PCT/SE2005/001086 5 nitrides or chromium carbonitrides. Nitrogen has also a precipitation hardening effect which will decrease the compressibility. Therefore the nitrogen content should not exceed 0.07%, preferably not 0.05% by weight. In 5 practice it is difficult to obtain nitrogen contents lower than 0.001%. Other alloying elements are added to enhance certain properties, such as strength, hardness etc. The alloying 10 elements are selected from the group consisting of molybdenum, copper, manganese and nickel. According to the present invention ferritic stainless steels are preferred. Ferritic stainless steels are less 15 expensive than austenitic stainless steels which are alloyed with nickel. Compared with an austenitic matrix a ferritic matrix has a lower coefficient of thermal expansion, which is beneficial for example in flanges in a stainless steel exhaust system. Therefore a preferred 20 embodiment of the stainless steel according to the invention is essentially free from nickel. Specifically the ferritic stainless steel may comprise 10-20% by weight of chromium, 0-5% by weight of molybdenum, less than 1% by weight of nickel, less than 0.2% by weight of 25 manganese. Other possible additives are flow agents, machinability improving agents such as calcium fluoride, manganese sulfide, boron nitride or combinations thereof. 30 The stainless steel powder may be a gas or water atomised, pre-alloyed powder having an average particle size above about 20 pm, depending on the method of consolidation of the powder. Normally the average 35 particle size is above about 50 pm.
WO 2006/004529 PCT/SE2005/001086 6 Most often a lubricant is added prior to compaction in order to enhance the compressibility of the powder and to facilitate the ejection of the green component. The amount of lubricant is typically between 0.1% and 2%, 5 preferably between 0.3% and 1.5%. The lubricants may be chosen from the group consisting of metal sterates, such as zink or lithium stearate, Kenolube*, amide polymers or amide oligomers, ethylene bisstearamide, fatty acid derivatives or other suitable substances with a 10 lubricating effect. Die wall lubrication alone or in combination with internal lubricants may also be used. After an optional annealing the stainless steel powder is mixed with lubricant and other optional additives. The 15 powder mixture is compacted at 400-1200 MPa and sintered at 1150-1350 0 C for 5 minutes to 1 hour to obtain a density of at least 7.20 g/cm 3 . However, the powder according to the invention can be used for producing parts having lower sintered density in order to reduce 20 processing costs. The compaction step could be performed as cold compaction or warm compaction. The high sintered density is obtained by increased shrinkage during the sintering and without being bound to 25 any specific theory, it is believed that this shrinkage is a consequence of promoted volume diffusion. Vanadium carbides which are formed in presence of carbon will be dissolved at elevated temperatures, especially at sintering temperatures, but also at lower temperatures 30 such as at annealing of the metal powder. Normally the sintering temperature for stainless steel powders is about 1150-1300'C. Example 1 35 Three different melts having a chemical composition according to table 1 and containing niobium and vanadium WO 2006/004529 PCT/SE2005/001086 7 as carbide forming elements were produced. Several mixtures were prepared for cold or warm compaction according to table 2 and 3. For cold compaction and warm compaction purposes lubricants were used. As a flow agent 5 in warm compaction Aerosil A-200 from Degussa* was used. Table 1. Chemical analysis of unannealed powders Batch Cr% Nb% V% Si% Mn% Ni% P% C% N% 0% S% A 11.85 --- 0.29 0.68 0.23 0.053 0.008 0.024 0.014 0.144 0.0033 B 11.94 0.39 --- 0.68 0.23 0.051 0.010 0.025 0.011 0.152 0.0027 C 11.79 0.58 --- 0.73 0.23 0.056 0.009 0.026 0.011 0.143 0.0030 Table 2. Mixtures for cold compaction Mixture Composition no 4* A + 1% lubricant 5 B + 1% lubricant 6 C + 1% lubricant 10 * = composition according to the invention Table 3. Mixtures for warm compaction Mixture Composition no 10* A + 1% lubricant + 0.1% A-200 11 B + 1% lubricant + 0.1% A-200 12 C + 1% lubricant + 0.1% A-200 * composition according to the invention 15 The powder mixtures according to table 2 and 3 were compacted and green properties were determined for various compaction pressures. The results are presented in table 4. The compacted bodies were sintered at 1250 0 C in an atmosphere of hydrogen for 45 minutes and the 20 sintered densities and mechanical properties were determined. The results are shown in table 5.
WO 2006/004529 PCT/SE2005/001086 8 Table 4. Mixture Compaction Green Green no pressure strength density (Mpa) (g/cm 3 ) 4* 600 15.3 6.57 700 18.0 6.69 800 19.3 6.79 5 600 15.4 6.55 700 18.1 6.68 800 19.5 6.80 6 600 15.3 6.55 700 18.1 6.68 800 19.4 6.78 10* 600 31.3 6.73 700 37.5 6.87 800 39.9 6.96 11 600 30.1 6.71 700 36.7 6.86 800 40.4 6.96 12 600 29.4 6.71 700 34.9 6.86 800 39.4 6.96 * composition according to the invention 5 Table 5. Mixture Compaction Sintered Dimensional Yield Tensile no pressure density change strength strength (MPa) (g/cm 3 ) (%) (MPa) (MPa) 4* 600 7.36 -3.87 222 390 700 7.42 -3.29 216 409 800 7.45 -2.71 215 405 5 600 7.24 -3.48 204 366 700 7.31 -3.09 208 375 800 7.38 -2.82 228 384 6 600 7.10 -2.85 202 356 700 7.20 -2.55 208 366 800 7.26 -2.30 213 376 10* 600 7.42 -3.38 221 420 700 7.47 -2.67 230 434 800 7.49 -2.20 234 431 11 600 7.28 -2.93 206 371 700 7.36 -2.52 210 386 800 7.43 -2.20 216 400 12 600 7.16 -2.36 203 361 700 7.27 -2.05 212 377 800 7.33 -1.79 214 389 * = composition according to the invention WO 2006/004529 PCT/SE2005/001086 9 From table 4 and table 5 it can clearly be identified that the sintered densities of the samples produced from the material according to the invention are improved, 5 while the green densities of the material according to the invention are similar to the comparative materials. The mechanical properties of the sintered components are also improved with material according to the invention compared with known materials. 10 Example 2 In order to evaluate the influence of sintering temperatures and sintering times, powder mixtures 4, 5 15 and 6 were compacted into tensile test samples according to ISO 2740 in a uniaxially compaction movement at ambient temperature at 600 MPa. The obtained green samples were sintered at 12000C, 1250'C and 13000C in an atmosphere of hydrogen for 20 minutes and 45 minutes, 20 respectively. After sintering the sintered density of the sintered samples were measured according to ISO 3369. The results are shown in table 6. From table 6 it can be concluded that sintered densities above 7.2 g/cm 3 can be obtained 25 for a ferritic stainless steel powder provided vanadium is added, even at a sintering temperature as low as 12000C. A sintering time of 20 minutes at a sintering temperature of 12500C yields a sintered density of 7.35 g/cm 3 , whereas the corresponding density for the niobium 30 stabilized ferritic stainless steel powder is 7.15 g/cm 3 and 7.03 g/cm 3 respectively, depending on the amount of niobium added. The example reveals a surprisingly great impact on the shrinkage during sintering of a green body produced from 35 ferritic stainless steel powder according to the invention.
WO 2006/004529 PCT/SE2005/001086 10 Table 6. Mixture Sintering Sintered densities (g/cm 3 ) at no time (min) different sintering temperatures 1200 0 C 1250 0 C 1300 0 C 4* 45 7.29 7.36 7.46 5 45 7.03 7.24 7.47 6 45 6.92 7.1 7.38 4* 20 - 7.35 5 20 - 7.16 6 20 - 7.03 * composition according to the invention 5 Example 3 In order to evaluate the influence of the nitrogen content of the stainless steel powder one melt was atomised and powder samples having different nitrogen 10 content were prepared from the atomised powder by annealing in a nitrogen-containing atmosphere. As reference material powder annealed in an atmosphere of 100 % of hydrogen was used. The powder samples were mixed with 1% lubricant and the obtained compositions were cold 15 compacted at different pressures into specimens. The specimens were sintered at 1250'C in an atmosphere of hydrogen for 45 minutes. The chemical analysis of the different powder samples is presented in table 7 except the nitrogen content, which was determined after 20 annealing as presented in table 8. In table 8 the sintered density is presented for different specimens.
WO 2006/004529 PCT/SE2005/001086 11 Table 7 Batch Cr% Nb% V% Si% Mn% Ni% P% C% S% D 12.14 0.01 0.29 0.83 0.13 0.05 0.001 0.017 0.012 Table 8 Compaction Sintered pressure Density Batch (MPa) %N (g/cm 3 D1 600 7.18 D1 700 0.056 7.28 D1 800 7.36 D2 600 7.13 D2 700 0.072 7.24 D2 800 7.31 D(ref) 600 7.23 D(ref) 700 0.019 7.34 D(ref) 800 1 7.39 5 It can be seen from example 3 that a nitrogen content above 0.07% will result in undesired sintered density.
Claims (8)
1. A pre-alloyed stainless steel powder comprising at least 10% by weight of chromium, less than 0.1% by 5 weight of carbon and less than 0.07% by weight of nitrogen, said powder further comprising vanadium in an amount of at least 4 times the combined amounts of carbon and nitrogen, wherein the amount of vanadium is 0.1-1% by weight. 10
2. The stainless steel powder according to claim 1, wherein the steel powder further comprises 10-30% chromium and 0.5-1.5% silicon.
3. The stainless steel powder according to claim 1 or 2, wherein the steel powder comprises 10-20% 15 chromium, 0.15-0.8% vanadium, 0.7-1.2% silicon, less than 0.05% carbon and less than 0.05% nitrogen.
4. The stainless steel powder according to claim 1, 2 or 3, wherein the steel powder is essentially free 20 from nickel.
5. A powder metallurgical composition comprising a stainless steel powder according to anyone of the preceding claims and additives selected from the group consisting of lubricants, flow agents, 25 machinability improving agents and alloying elements.
6. A process of preparing compacted parts of stainless steel powder comprising the steps of: - subjecting a steel powder according to anyone of 30 claims 1 to 4 optionally mixed with a lubricant - sintering the compacted part at a temperature of
1150-1350 0 C.
7. The process according to claim 6, wherein sintering is made to a density of at least 7.20 g/cm 3 35
8. A sintered part of stainless steel powder according to anyone of claims 1 to 4, having a sintered density of at least 7.20 g/cm 3
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0401707A SE0401707D0 (en) | 2004-07-02 | 2004-07-02 | Stainless steel powder |
SE0401707-5 | 2004-07-02 | ||
PCT/SE2005/001086 WO2006004529A1 (en) | 2004-07-02 | 2005-07-01 | Stainless steel powder |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2005260139A1 true AU2005260139A1 (en) | 2006-01-12 |
AU2005260139B2 AU2005260139B2 (en) | 2009-09-03 |
Family
ID=32733732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2005260139A Ceased AU2005260139B2 (en) | 2004-07-02 | 2005-07-01 | Stainless steel powder |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP1768803B1 (en) |
JP (1) | JP4580984B2 (en) |
CN (1) | CN101124058B (en) |
AT (1) | ATE483541T1 (en) |
AU (1) | AU2005260139B2 (en) |
BR (1) | BRPI0512943A (en) |
CA (1) | CA2572130C (en) |
DE (1) | DE602005023998D1 (en) |
DK (1) | DK1768803T3 (en) |
ES (1) | ES2354019T3 (en) |
MX (1) | MXPA06015244A (en) |
RU (1) | RU2345866C2 (en) |
SE (1) | SE0401707D0 (en) |
TW (1) | TWI279268B (en) |
UA (1) | UA83145C2 (en) |
WO (1) | WO2006004529A1 (en) |
ZA (1) | ZA200700040B (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2066823B1 (en) * | 2006-09-22 | 2010-11-24 | Höganäs Ab (publ) | Metallurgical powder composition and method of production |
RU2458172C2 (en) * | 2006-09-22 | 2012-08-10 | Хеганес Аб (Пабл) | Metallurgical powdered composition and method for its obtaining |
CN102656288B (en) * | 2009-10-16 | 2017-08-18 | 霍加纳斯公司(Publ) | Nitrogenous low nickel sintered stainless steel |
JP5992402B2 (en) * | 2010-06-04 | 2016-09-14 | ホガナス アクチボラグ (パブル) | Manufacturing method of nitrided sintered component |
TWI421375B (en) * | 2011-01-28 | 2014-01-01 | Taiwan Powder Technologies Co Ltd | Methods for improving the mechanical properties of non - Austrian iron - based stainless steel surfaces |
TWI421374B (en) * | 2011-01-28 | 2014-01-01 | Taiwan Powder Technologies Co Ltd | Stainless steel low temperature carburizing method |
TWI421376B (en) * | 2011-01-28 | 2014-01-01 | Taiwan Powder Technologies Co Ltd | Method of Improving Strength and Hardness of Powder Metallurgy Stainless Steel |
CN102660709A (en) * | 2012-04-24 | 2012-09-12 | 邓湘凌 | High-strength wear-resisting alloy and preparation method thereof |
DE102012216052A1 (en) * | 2012-09-11 | 2014-04-10 | Robert Bosch Gmbh | Sintered pressing part and method for producing such |
CN103643160B (en) * | 2013-11-11 | 2016-01-20 | 常熟市迅达粉末冶金有限公司 | A kind of high-performance 17-4PH stainless steel and preparation method thereof |
JP6314842B2 (en) * | 2015-01-06 | 2018-04-25 | セイコーエプソン株式会社 | Metal powder for powder metallurgy, compound, granulated powder and sintered body |
JP6314846B2 (en) * | 2015-01-09 | 2018-04-25 | セイコーエプソン株式会社 | Metal powder for powder metallurgy, compound, granulated powder and sintered body |
JP6319121B2 (en) * | 2015-01-29 | 2018-05-09 | セイコーエプソン株式会社 | Method for producing metal powder for powder metallurgy, compound, granulated powder and sintered body |
JP6314866B2 (en) * | 2015-02-09 | 2018-04-25 | セイコーエプソン株式会社 | Method for producing metal powder for powder metallurgy, compound, granulated powder and sintered body |
RU2750720C1 (en) * | 2020-04-18 | 2021-07-01 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Юго-Западный государственный университет" (ЮЗГУ) | Method of obtaining a sintered product from powder corrosive steel |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5947358A (en) * | 1982-09-08 | 1984-03-17 | Kawasaki Steel Corp | Steel powder for wear resistant sintered alloy |
ZA938889B (en) * | 1992-12-07 | 1994-08-01 | Mintek | Stainless steel composition |
AU4887796A (en) * | 1995-03-10 | 1996-10-02 | Powdrex Limited | Stainless steel powders and articles produced therefrom by powder metallurgy |
JP4975916B2 (en) * | 2001-09-21 | 2012-07-11 | 株式会社日立製作所 | High toughness and high strength ferritic steel and its manufacturing method |
SE0201825D0 (en) * | 2002-06-14 | 2002-06-14 | Hoeganaes Ab | Hot compaction or steel powders |
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2004
- 2004-07-02 SE SE0401707A patent/SE0401707D0/en unknown
-
2005
- 2005-07-01 ES ES05755291T patent/ES2354019T3/en active Active
- 2005-07-01 AU AU2005260139A patent/AU2005260139B2/en not_active Ceased
- 2005-07-01 DE DE602005023998T patent/DE602005023998D1/en active Active
- 2005-07-01 AT AT05755291T patent/ATE483541T1/en not_active IP Right Cessation
- 2005-07-01 CA CA2572130A patent/CA2572130C/en not_active Expired - Fee Related
- 2005-07-01 JP JP2007519170A patent/JP4580984B2/en not_active Expired - Fee Related
- 2005-07-01 RU RU2007104054/02A patent/RU2345866C2/en not_active IP Right Cessation
- 2005-07-01 EP EP05755291A patent/EP1768803B1/en not_active Not-in-force
- 2005-07-01 ZA ZA200700040A patent/ZA200700040B/en unknown
- 2005-07-01 CN CN2005800217987A patent/CN101124058B/en not_active Expired - Fee Related
- 2005-07-01 TW TW094122382A patent/TWI279268B/en not_active IP Right Cessation
- 2005-07-01 BR BRPI0512943-5A patent/BRPI0512943A/en not_active IP Right Cessation
- 2005-07-01 UA UAA200701061A patent/UA83145C2/en unknown
- 2005-07-01 WO PCT/SE2005/001086 patent/WO2006004529A1/en active Application Filing
- 2005-07-01 MX MXPA06015244A patent/MXPA06015244A/en active IP Right Grant
- 2005-07-01 DK DK05755291.1T patent/DK1768803T3/en active
Also Published As
Publication number | Publication date |
---|---|
RU2345866C2 (en) | 2009-02-10 |
TW200605972A (en) | 2006-02-16 |
BRPI0512943A (en) | 2008-04-15 |
UA83145C2 (en) | 2008-06-10 |
CN101124058A (en) | 2008-02-13 |
EP1768803B1 (en) | 2010-10-06 |
MXPA06015244A (en) | 2007-03-15 |
CA2572130C (en) | 2011-01-18 |
JP4580984B2 (en) | 2010-11-17 |
ZA200700040B (en) | 2008-06-25 |
TWI279268B (en) | 2007-04-21 |
DK1768803T3 (en) | 2011-01-31 |
RU2007104054A (en) | 2008-08-10 |
EP1768803A1 (en) | 2007-04-04 |
SE0401707D0 (en) | 2004-07-02 |
ATE483541T1 (en) | 2010-10-15 |
WO2006004529A1 (en) | 2006-01-12 |
DE602005023998D1 (en) | 2010-11-18 |
CA2572130A1 (en) | 2006-01-12 |
AU2005260139B2 (en) | 2009-09-03 |
CN101124058B (en) | 2010-06-16 |
ES2354019T3 (en) | 2011-03-09 |
JP2008505248A (en) | 2008-02-21 |
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