EP0564778B1 - Sinterwerkstoff - Google Patents

Sinterwerkstoff Download PDF

Info

Publication number
EP0564778B1
EP0564778B1 EP93102028A EP93102028A EP0564778B1 EP 0564778 B1 EP0564778 B1 EP 0564778B1 EP 93102028 A EP93102028 A EP 93102028A EP 93102028 A EP93102028 A EP 93102028A EP 0564778 B1 EP0564778 B1 EP 0564778B1
Authority
EP
European Patent Office
Prior art keywords
powder
base material
additional material
molybdenum
powder according
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
Application number
EP93102028A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0564778A1 (de
Inventor
Niels Strathe Mikkelsen
Mogens Jensen
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.)
FERRITSLEV JERNWAREFABRIK AS
Grundfos AS
Original Assignee
FERRITSLEV JERNWAREFABRIK AS
Grundfos AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FERRITSLEV JERNWAREFABRIK AS, Grundfos AS filed Critical FERRITSLEV JERNWAREFABRIK AS
Publication of EP0564778A1 publication Critical patent/EP0564778A1/de
Application granted granted Critical
Publication of EP0564778B1 publication Critical patent/EP0564778B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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%

Definitions

  • the invention relates to a sintered material, in particular the Starting materials and the process parameters for producing this Material.
  • Sintered materials have become components of the Mass production more and more prevalent. It is known that Workpieces made of sintered material with large quantities reduce the manufacturing costs compared to conventionally manufactured workpieces can lower, especially due to their high dimensional accuracy in comparison to castings or others by cold or hot working produced workpieces at comparatively low workpiece costs.
  • the present invention is therefore based on the object a starting material and a process for economic Production of a corrosion-resistant, weldable and dense sintered body to accomplish.
  • the sintered material according to the invention is due to its austenitic Sufficiently corrosion-resistant base material, it is also weldable and also leakproof.
  • the latter property is based essentially on the choice of filler material.
  • the phosphorus or the phosphorus compound contained in the filler material forms a liquid with the base material during sintering Phase, which due to capillary action the gaps of the Fills the base material.
  • There may be larger ones Form voids between the particles of the base material, however is the total composite of these particles by the liquid Phase closed. This creates a completely dense material.
  • the filler material also molybdenum in the specified amounts.
  • a phosphorus-iron compound is preferred in the claimed Ratios used. It can also be phosphorus and the other alloying elements of the filler material individually be added. Then one takes place during the sintering partial alloy of the filler and then the above Penetration into the gaps in the base material.
  • the molded body created by the invention has in addition to the aforementioned advantages such as corrosion resistance, weldability and tightness have other practical advantages.
  • the high dimensional stability can be observed in particular.
  • Straight in the ferritic background materials known from the prior art, a phosphorus compound as filler material has been added is a high shrinkage after sintering determine, for example, in the order of 6% to 7% lies.
  • the sintered material according to the invention offers the process engineering special advantage that the sintering temperature below 1200 ° C, in the Usually even below 1,150 ° C (the higher the phosphorus content, the lower may be the sintering temperature), so that the sintering in conventional continuous furnaces under a protective gas atmosphere, for example Hydrogen or nitrogen.
  • a protective gas atmosphere for example Hydrogen or nitrogen.
  • the grain size is sufficient be small.
  • the grain size should not be over 150 ⁇ m.
  • the filler material has an average grain diameter of up to 45 ⁇ m proved to be useful. Especially good results are with a grain diameter of up to 30 ⁇ m been achieved.
  • a lubricant is added to the powder, preferably on the order of about one percent by weight.
  • Such lubricants are known in sintering technology. So that Lubricant does not hinder sintering, it is Pre-sintered at about 400 ° C after pressing. Connects to that the actual sintering process is between 1,100 ° C and 1,200 ° C on.
  • the sintering temperature is essentially dependent on the phosphorus content in the filler metal and the relationship between the filler metal and base material. In the preferred listed below
  • the raw material is the sintering temperature of around 1,150 ° C with a sintering time of about 40 minutes.
  • composition of a preferred powder for the production of a sintered body for example part of a Pump housing, specified:
  • the powder has an average grain diameter of 80 ⁇ m.
  • a mixture of Fe 3 P and pure, unbound molybdenum is used as filler material. Based on the finished powder (base material and additive), the Fe 3 P content is 6% to 7% and the molybdenum content is 0.5% to 1%.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Centrifugal Separators (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Soft Magnetic Materials (AREA)
EP93102028A 1992-03-07 1993-02-10 Sinterwerkstoff Expired - Lifetime EP0564778B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4207255A DE4207255C1 (enrdf_load_stackoverflow) 1992-03-07 1992-03-07
DE4207255 1992-03-07

Publications (2)

Publication Number Publication Date
EP0564778A1 EP0564778A1 (de) 1993-10-13
EP0564778B1 true EP0564778B1 (de) 1998-01-14

Family

ID=6453476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102028A Expired - Lifetime EP0564778B1 (de) 1992-03-07 1993-02-10 Sinterwerkstoff

Country Status (5)

Country Link
EP (1) EP0564778B1 (enrdf_load_stackoverflow)
AT (1) ATE162229T1 (enrdf_load_stackoverflow)
DE (2) DE4207255C1 (enrdf_load_stackoverflow)
DK (1) DK0564778T3 (enrdf_load_stackoverflow)
ES (1) ES2113446T3 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1991715A1 (en) * 2006-02-20 2008-11-19 FJ Sintermetal A powder and a process for the production of a sintered body, and a sintered body
CN101579734A (zh) * 2009-06-22 2009-11-18 上海兴罗特种密封件有限公司 一种耐压且致密性优越的粉末冶金材料及用途
CN104117670A (zh) * 2014-07-31 2014-10-29 上海兴罗特种密封件有限公司 一种用于生产汽车电控泵调整垫板的材料及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR793084A (fr) * 1935-07-06 1936-01-15 Alliage résistant à la corrosion
SE410984B (sv) * 1975-10-24 1979-11-19 Hoeganaes Ab Fosforhaltigt stalpulver och sett for dess framstellning
DE3226257A1 (de) * 1982-07-14 1984-01-19 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur herstellung von sinterstahl hoher raumerfuellung durch einfachsintertechnik
JPH076026B2 (ja) * 1986-09-08 1995-01-25 マツダ株式会社 耐摩耗性に優れた鉄系焼結合金部材の製造法
AT395120B (de) * 1990-02-22 1992-09-25 Miba Sintermetall Ag Verfahren zum herstellen zumindest der verschleissschicht hochbelastbarer sinterteile, insbesondere fuer die ventilsteuerung einer verbrennungskraftmaschine

Also Published As

Publication number Publication date
DK0564778T3 (da) 1998-09-14
DE59307965D1 (de) 1998-02-19
ES2113446T3 (es) 1998-05-01
EP0564778A1 (de) 1993-10-13
ATE162229T1 (de) 1998-01-15
DE4207255C1 (enrdf_load_stackoverflow) 1993-06-24

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