EP0097737A1 - Procédé de fabrication par la métallurgie des poudres de pièces en acier allié au Si-Mn ou Si-Mn-C présentant une résistance et dureté élevée - Google Patents

Procédé de fabrication par la métallurgie des poudres de pièces en acier allié au Si-Mn ou Si-Mn-C présentant une résistance et dureté élevée Download PDF

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Publication number
EP0097737A1
EP0097737A1 EP82110622A EP82110622A EP0097737A1 EP 0097737 A1 EP0097737 A1 EP 0097737A1 EP 82110622 A EP82110622 A EP 82110622A EP 82110622 A EP82110622 A EP 82110622A EP 0097737 A1 EP0097737 A1 EP 0097737A1
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EP
European Patent Office
Prior art keywords
silicon
manganese
powder
alloy
hardness
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.)
Granted
Application number
EP82110622A
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German (de)
English (en)
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EP0097737B1 (fr
Inventor
Fritz Prof. Dr. Thümmler
Aloisio Klein
Rainer Oberacker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forschungszentrum Karlsruhe GmbH
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Kernforschungszentrum Karlsruhe GmbH
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Application filed by Kernforschungszentrum Karlsruhe GmbH filed Critical Kernforschungszentrum Karlsruhe GmbH
Priority to AT82110622T priority Critical patent/ATE23198T1/de
Publication of EP0097737A1 publication Critical patent/EP0097737A1/fr
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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%
    • C22C33/0271—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5% with only C, Mn, Si, P, S, As as alloying elements, e.g. carbon steel
    • 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

Definitions

  • the invention relates to a method for the powder-metallurgical production of moldings of high strength and hardness from silicon-manganese or silicon-manganese-carbon alloyed steels.
  • the elements Cu, Ni, Mo, P and C are mainly used as alloying elements.
  • a whole range of alloying elements that are successfully used in melt metallurgy can only be used to a limited extent in powder metallurgy.
  • Si is known as a solidifying solidifying agent. Significant increases in strength can also be achieved with Si in Fe-based alloys produced by powder metallurgy [Hoffmann, G., Thümmler, F., Zapf, G .; Sintering, Homogenization and Properties of a-Phase Iron-Aluminum and Iron-Silicon Alloys ; Powder Metallurgy, 3rd European Powder. Met. Symp. 1971 Conf. Supplement, Pt 1, 335-361J.
  • powder metallurgy powder metallurgy
  • Si tends to oxide formation due to its high affinity for oxygen in technical sintering atmospheres.
  • Mn has also found its way into powder metallurgy as an alloying element. Since it is also very affinity for oxygen, special protective measures are also required here. It is known, for example, to introduce Mn over carbide master alloys [process for producing homogeneous manganese alloyed sintered steels; German patent specification 24 56 7811. These master alloys are stable up to the sintering temperature, which protects the alloy elements against oxidation. Since Mn is not itself a strong carbide former, these master alloys must be used inevitably contain carbide-forming elements such as Cr, Mo or V. These elements are very expensive, which greatly increases the alloying costs. The high hardness of the carbides also causes increased tool wear.
  • the invention has for its object to provide a method for powder metallurgical production of moldings of high strength and hardness and sufficient toughness from sintered steels, in which only more readily available alloy elements, the purchase of which is ensured in the long term, are used.
  • the shaped parts are said to be able to be manufactured to size by the invention during the sintering process, i.e. they should not suffer any shrinkage and / or no loss of strength due to anti-shrinkage measures due to additions of alloying elements.
  • Example 2 The alloy used in Example 2 was sintered in hydrogen at 1200 ° C. for 60 minutes and then tempered. Tempering treatment: Austenitized at 1000 C, 60 min. In argon, quenched in oil, annealed 60 min. In argon at the specified temperatures (see Figure 6). Optimal strength and hardness values are achieved at tempering temperatures of 200 to 300 ° C, the elongation at break is still measurable (> 1%).
  • the master alloy was melted in a vacuum furnace and, after cooling, mechanically comminuted to a particle size below 25 ⁇ m (average particle size about 10 ⁇ m).
  • the comminution can take place in a crusher, in a vibrating disk mill or in a ball mill.
  • FIGS. 7 and 8 show the mechanical properties and the dimensional changes of the silicon-manganese or silicon-manganese-carbon alloyed sintered steels produced according to this.
  • Figure 7 shows the optimization of the content of the master alloy used, an optimal content of about 8 wt .-% (these are manganese and silicon contents in the sintered alloy of 3.3 wt .-% manganese and 1.5 wt .-% silicon) was determined.
  • FIG. 8 shows the influence of the carbon content in the optimal alloy (8% by weight pre-alloy in sintered steel).
  • Dimensional stability can be achieved by suitably adjusting the composition and sintering temperature.
  • the Si-Mn-Fe master alloys in the specified ranges for the silicon and manganese content also lead to the formation of a liquid phase in the specified range of technical sintering temperatures during the sintering process, which also contributes to the substantial improvement of the properties of the invention sintered steels is responsible.
  • Lower levels of manganese and silicon require too high proportions of a master alloy to achieve optimum alloy levels. This makes the powder mixtures more difficult to press, which leads to a decrease in density. Higher contents, particularly of silicon, no longer lead to the formation of a liquid phase in the range of the sintering temperatures up to approx. 1250 ° C.
  • Fig. 5 dimensional changes (curve 16) of one and the same alloy (Fe + 1Si + 3Mn + 0.25C) depending on the sintering temperature used in the production.
  • Fig. 6 tensile strengths (curve 17), hardness values (curve 18) and elongations at break (curve 19) of one and the same alloy (Fe + 1Si + 3Mn + 0.25C) depending on the tempering temperature.
  • Fig. 7 tensile strengths (R m ): curve 20, yield strengths (R p0.1 ): curve 21, hardness values (HV 20 ): curve 22, elongations at break (A): curve 23 and dimensional changes ( ⁇ 1 / 1 o ): curve 24 different Si-Mn-alloyed sintered steels (without C addition) depending on the content of the master alloy (19 Si-41Mn-40Fe) in the powder mixture to be sintered.
  • Fig. 8 Tensile strengths: curve 25, yield strengths: curve 26, hardness values: curve 27, elongation at break: curve 28 and dimensional changes: curve 29 of sintered steels with 8% by weight of pre-alloy (19Si-41Mn-40Fe) depending on their C- Salary.

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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)
EP82110622A 1982-05-22 1982-11-18 Procédé de fabrication par la métallurgie des poudres de pièces en acier allié au Si-Mn ou Si-Mn-C présentant une résistance et dureté élevée Expired EP0097737B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110622T ATE23198T1 (de) 1982-05-22 1982-11-18 Verfahren zur pulvermetallurgischen herstellung von formteilen hoher festigkeit und haerte aus si- mn- oder si-mn-c-legierten staehlen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219324 1982-05-22
DE19823219324 DE3219324A1 (de) 1982-05-22 1982-05-22 Verfahren zur pulvermetallurgischen herstellung von formteilen hoher festigkeit und haerte aus si-mn- oder si-mn-c-legierten staehlen

Publications (2)

Publication Number Publication Date
EP0097737A1 true EP0097737A1 (fr) 1984-01-11
EP0097737B1 EP0097737B1 (fr) 1986-10-29

Family

ID=6164277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110622A Expired EP0097737B1 (fr) 1982-05-22 1982-11-18 Procédé de fabrication par la métallurgie des poudres de pièces en acier allié au Si-Mn ou Si-Mn-C présentant une résistance et dureté élevée

Country Status (5)

Country Link
US (1) US4913739A (fr)
EP (1) EP0097737B1 (fr)
JP (1) JPS58210147A (fr)
AT (1) ATE23198T1 (fr)
DE (2) DE3219324A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252048A1 (fr) * 1986-07-04 1988-01-07 Höganäs AB Article isolant de la chaleur et son procédé de préparation
WO1994014991A1 (fr) * 1992-12-21 1994-07-07 Stackpole Limited Procede de matriçage d'articles juste frittes
WO1994014557A1 (fr) * 1992-12-21 1994-07-07 Stackpole Limited Procede de production de paliers
WO1996016759A1 (fr) * 1994-11-25 1996-06-06 Höganäs Ab Materiaux a resistance elevee a la traction contenant du manganese
WO1997001651A1 (fr) * 1995-06-29 1997-01-16 Stackpole Limited Alliage fritte de densite elevee et procede de spheroidisation pour poudres pre-alliees
US7153339B2 (en) 2004-04-06 2006-12-26 Hoeganaes Corporation Powder metallurgical compositions and methods for making the same
KR101233930B1 (ko) * 2004-08-13 2013-02-15 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를 전달하는 장치 및 방법

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711187A (en) * 1990-10-08 1998-01-27 Formflo Ltd. Gear wheels rolled from powder metal blanks and method of manufacture
JPH0827388B2 (ja) * 1990-11-08 1996-03-21 動力炉・核燃料開発事業団 耐熱放射線遮蔽材
AU2569292A (en) * 1992-09-09 1994-03-29 Stackpole Limited Powder metal alloy process
EP0846782A1 (fr) * 1992-09-09 1998-06-10 STACKPOLE Limited Procédé de préparation d'un alliage à base de métal pulvérulent
JPH08501832A (ja) * 1992-09-25 1996-02-27 パウドレックス リミテッド 焼結合金鋼成分の生成方法
JPH09511546A (ja) * 1994-02-07 1997-11-18 スタックポール リミテッド 高密度焼結合金
US5641920A (en) * 1995-09-07 1997-06-24 Thermat Precision Technology, Inc. Powder and binder systems for use in powder molding
US5997805A (en) * 1997-06-19 1999-12-07 Stackpole Limited High carbon, high density forming
US20050053512A1 (en) * 2003-09-09 2005-03-10 Roche Castings Pty Ltd Alloy steel composition
WO2005103315A1 (fr) * 2004-04-23 2005-11-03 Kabushiki Kaisha Toyota Chuo Kenkyusho Alliage fritté à base de fer, élément d’un alliage fritté à base de fer et procédé pour la fabrication de ceux-ci
US7237730B2 (en) * 2005-03-17 2007-07-03 Pratt & Whitney Canada Corp. Modular fuel nozzle and method of making
US8316541B2 (en) 2007-06-29 2012-11-27 Pratt & Whitney Canada Corp. Combustor heat shield with integrated louver and method of manufacturing the same
US7543383B2 (en) 2007-07-24 2009-06-09 Pratt & Whitney Canada Corp. Method for manufacturing of fuel nozzle floating collar
JP5588879B2 (ja) * 2008-01-04 2014-09-10 ジーケーエヌ シンター メタルズ、エル・エル・シー プレアロイ銅合金粉末鍛造連接棒
US9248500B2 (en) * 2008-08-04 2016-02-02 Apex Advanced Technologies, Llc Method for protecting powder metallurgy alloy elements from oxidation and/or hydrolization during sintering
JP5535576B2 (ja) * 2008-11-10 2014-07-02 株式会社豊田中央研究所 鉄基焼結合金およびその製造方法並びに鉄基焼結合金部材
JP5308123B2 (ja) * 2008-11-10 2013-10-09 株式会社神戸製鋼所 高強度組成鉄粉とそれを用いた焼結部品
CN103600075B (zh) * 2013-10-10 2016-06-29 铜陵新创流体科技有限公司 一种粉末冶金无钴铁基合金及其制备方法
CN103600073B (zh) * 2013-10-10 2016-05-04 铜陵新创流体科技有限公司 一种粉末冶金链轮及其制备方法
CN103600081B (zh) * 2013-10-10 2016-05-04 铜陵新创流体科技有限公司 一种粉末冶金制冷压缩机阀片及其制备方法
CN103600076B (zh) * 2013-10-10 2016-05-04 铜陵新创流体科技有限公司 一种粉末冶金汽车转向助力泵定子及其制备方法
CN103600074B (zh) * 2013-10-10 2016-05-04 铜陵新创流体科技有限公司 一种粉末冶金耐磨合金及其制备方法
CN115341128B (zh) * 2018-07-26 2023-04-21 广东美芝制冷设备有限公司 无铜冶金材料的制备方法及无铜冶金材料、平衡块和压缩机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538227A (en) * 1939-12-12 1941-07-25 William Arthur Oubridge Improvements in or relating to the manufacture of metal articles or masses
DE1928930A1 (de) * 1968-06-11 1970-11-26 Mitsubishi Heavy Ind Ltd Verfahren zum Herstellen eisenhaltiger Sinterwerkstoffe
DE2358720A1 (de) * 1972-11-27 1974-05-30 Hellmut Prof Fischmeister Schmieden von metallpulvern
DE2646444A1 (de) * 1975-12-08 1977-06-16 Ford Werke Ag Pulvrige hauptlegierung als zuschlag zu einem eisenpulver

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043807A (en) * 1974-01-02 1977-08-23 The International Nickel Company, Inc. Alloy steels
US4058414A (en) * 1975-12-30 1977-11-15 Sumitomo Metal Industries, Ltd. Method of making cold-rolled high strength steel sheet
US4011108A (en) * 1976-01-19 1977-03-08 Stora Kopparbergs Bergslags Aktiebolag Cutting tools and a process for the manufacture of such tools
US4035159A (en) * 1976-03-03 1977-07-12 Toyota Jidosha Kogyo Kabushiki Kaisha Iron-base sintered alloy for valve seat
CA1125056A (fr) * 1979-06-13 1982-06-08 Jean C. Farge Fonte blanche faiblement alliee
US4265660A (en) * 1979-07-03 1981-05-05 Henrik Giflo High-strength free-cutting steel able to support dynamic stresses
JPS599152A (ja) * 1982-07-06 1984-01-18 Nissan Motor Co Ltd 耐摩耗性焼結合金

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538227A (en) * 1939-12-12 1941-07-25 William Arthur Oubridge Improvements in or relating to the manufacture of metal articles or masses
DE1928930A1 (de) * 1968-06-11 1970-11-26 Mitsubishi Heavy Ind Ltd Verfahren zum Herstellen eisenhaltiger Sinterwerkstoffe
DE2358720A1 (de) * 1972-11-27 1974-05-30 Hellmut Prof Fischmeister Schmieden von metallpulvern
DE2646444A1 (de) * 1975-12-08 1977-06-16 Ford Werke Ag Pulvrige hauptlegierung als zuschlag zu einem eisenpulver

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252048A1 (fr) * 1986-07-04 1988-01-07 Höganäs AB Article isolant de la chaleur et son procédé de préparation
WO1988000102A1 (fr) * 1986-07-04 1988-01-14 Höganäs Ab Element thermo-isolant et procede de fabrication dudit element
AU600966B2 (en) * 1986-07-04 1990-08-30 Hoganas A.B. Heat-insulating component and a method of making same
US4964909A (en) * 1986-07-04 1990-10-23 Hoganas Ab Heat-insulating component and a method of making same
WO1994014991A1 (fr) * 1992-12-21 1994-07-07 Stackpole Limited Procede de matriçage d'articles juste frittes
WO1994014557A1 (fr) * 1992-12-21 1994-07-07 Stackpole Limited Procede de production de paliers
WO1996016759A1 (fr) * 1994-11-25 1996-06-06 Höganäs Ab Materiaux a resistance elevee a la traction contenant du manganese
WO1997001651A1 (fr) * 1995-06-29 1997-01-16 Stackpole Limited Alliage fritte de densite elevee et procede de spheroidisation pour poudres pre-alliees
US7153339B2 (en) 2004-04-06 2006-12-26 Hoeganaes Corporation Powder metallurgical compositions and methods for making the same
US7527667B2 (en) 2004-04-06 2009-05-05 Hoeganaes Corporation Powder metallurgical compositions and methods for making the same
KR101233930B1 (ko) * 2004-08-13 2013-02-15 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를 전달하는 장치 및 방법
KR101235427B1 (ko) * 2004-08-13 2013-02-20 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를 전달하는 장치 및 방법
KR101235452B1 (ko) * 2004-08-13 2013-02-20 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를 전달하는 장치 및 방법
KR101235465B1 (ko) * 2004-08-13 2013-02-20 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를전달하는 장치 및 방법
KR101235553B1 (ko) * 2004-08-13 2013-02-21 소니 주식회사 셀룰러 통신 시스템에서 사용자 장비 고유의 정보를 전달하는 장치 및 방법

Also Published As

Publication number Publication date
DE3273998D1 (en) 1986-12-04
ATE23198T1 (de) 1986-11-15
DE3219324A1 (de) 1983-11-24
JPS58210147A (ja) 1983-12-07
US4913739A (en) 1990-04-03
EP0097737B1 (fr) 1986-10-29

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