EP0854763A2 - Process for producing an intermetallic join - Google Patents
Process for producing an intermetallic joinInfo
- Publication number
- EP0854763A2 EP0854763A2 EP96945136A EP96945136A EP0854763A2 EP 0854763 A2 EP0854763 A2 EP 0854763A2 EP 96945136 A EP96945136 A EP 96945136A EP 96945136 A EP96945136 A EP 96945136A EP 0854763 A2 EP0854763 A2 EP 0854763A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcement part
- intermetallic
- reinforcement
- graphite
- aluminum
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0085—Materials for constructing engines or their parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
Definitions
- the invention relates to a method for producing an intermetallic connection between a motor component made of an aluminum-based alloy and a reinforcement part made of austenitic cast iron, which are connected to one another by casting technology.
- Corresponding methods are used in particular for introducing ring girders, occasionally also for introducing trough edge reinforcements in diesel engines.
- the reinforcement part is connected to the piston material using the Alfin process, which has been known in the prior art since approx. 1950, by immersing the reinforcement part in an AlSi melt before the piston material is cast around it forms an intermetallic layer on the surface of the reinforcement part.
- the invention is therefore concerned with the problem of increasing the strength of the intermetallic bond between the casting and the reinforcement part regardless of the use of a GGG or GGL material.
- An essential area of application for the method according to the invention is in the production of pistons with reinforcement parts made of austenitic cast iron according to claim 2, the reinforcement parts according to claim 3 preferably being ring carriers.
- the reinforcement parts must be annealed in an oven atmosphere with oxidizing and reducing components in order to largely avoid the formation of concentration differences due to nickel diffusion on the surface and the formation of iron oxides on the surface a surface formed in this way has a disruptive effect in the subsequent process steps.
- Fig. 1 shows a cross section of an Alfin bond according to the invention with edge-graphitized reinforcement part
- Fig. 2 shows a cross section of an Alfin bond without edge graphitization for comparison.
- a reinforcement part made of austenitic cast material 1 with lamellar graphite formation is connected to a piston material AlSil2CuNiMg 2 by an Alfin layer 3.
- the austenitic cast material is edge-graphitized in the area of the alfin bond to a depth of approx. 100-150 ⁇ m.
- the de-graphitization is carried out by annealing the casting material in exogas at temperatures of at least o o
- the content of CO and CO and the dew point must be set so that there is a good decarburizing effect in order to achieve short annealing times. In the present case, the glow time was 25 minutes.
- exogas which has both reducing and oxidizing components, largely avoids differences in concentration and the formation of oxides on the surface.
- the further process steps correspond to the Alfin process known in the prior art.
- the compact graphite lamellae instead of the compact graphite lamellae, only loosened, non-coherent, pearl-cord-shaped oxides can be seen in the alfin layer 3, which do not have an effect on the strength of the alfin layer, or at least have a significantly lower effect than the graphite lamellae of an unannealed austenitic cast iron.
- FIG. 2 A conventional alfin layer is shown in FIG. 2 only for comparison. There, the Alfin layer 4 is clearly penetrated by graphite lamellae, which weaken the Alfin bond, since they act as defects.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19537847A DE19537847A1 (en) | 1995-10-11 | 1995-10-11 | Reinforcement part, the base material of which is austenitic cast iron |
DE19537847 | 1995-10-11 | ||
PCT/DE1996/001808 WO1997013597A2 (en) | 1995-10-11 | 1996-09-20 | Process for producing an intermetallic join |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0854763A2 true EP0854763A2 (en) | 1998-07-29 |
EP0854763B1 EP0854763B1 (en) | 1999-09-01 |
Family
ID=7774578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96945136A Expired - Lifetime EP0854763B1 (en) | 1995-10-11 | 1996-09-20 | Process for producing an intermetallic join |
Country Status (6)
Country | Link |
---|---|
US (1) | US6112802A (en) |
EP (1) | EP0854763B1 (en) |
JP (1) | JPH11514931A (en) |
BR (1) | BR9610925A (en) |
DE (2) | DE19537847A1 (en) |
WO (1) | WO1997013597A2 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU773579B2 (en) * | 2000-08-10 | 2004-05-27 | Breville Pty Ltd | Improvements in forming metallic laminates |
DE10103596A1 (en) * | 2001-01-26 | 2002-08-01 | Bruehl Eisenwerk | Method for producing a cast workpiece formed from at least two different metal materials |
DE10103896A1 (en) * | 2001-01-30 | 2002-08-08 | Mahle Gmbh | Process for the pretreatment of a ring carrier before the finishing |
DE10137436C2 (en) * | 2001-07-31 | 2003-07-31 | Ks Kolbenschmidt Gmbh | Pre-finishing of cast parts |
DE10153306B4 (en) * | 2001-10-31 | 2010-07-15 | Daimler Ag | Method for pouring an insert |
DE10157478A1 (en) * | 2001-11-23 | 2003-06-05 | Fne Gmbh | Compound metal material is a shaped first metal, e.g. a wire coil, embedded in a ground matrix of the second metal. |
DE10205798A1 (en) * | 2002-02-13 | 2003-09-04 | Federal Mogul Wiesbaden Gmbh | Metallic insert for inserting in an upper part and/or a lower part or a reinforcing rib of a bearing block made of cast aluminum alloy or cast aluminum has on its outer peripheral surface a cover layer made of aluminum alloy or aluminum |
EP1485514A1 (en) * | 2002-03-18 | 2004-12-15 | Karl Merz | Method and device for the alfin processing of components |
DE102012011992A1 (en) * | 2012-06-16 | 2013-12-19 | Volkswagen Aktiengesellschaft | Metallic cast component and method of making a metallic cast component |
DE102012220645B3 (en) * | 2012-11-13 | 2014-04-03 | Federal-Mogul Nürnberg GmbH | Piston for internal combustion engine, has cooling duct that is formed entirely in cast-on upper portion made from aluminum or aluminum alloy, and ring box that is formed in base portion made from steel |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1048677B (en) * | 1959-01-15 | Mahle-Werk Gesellschaft mit be schrankter Haftung, Fellbach (Wurtt) | Process for applying an aluminum or aluminum oxide coating to an iron alloy - for example cast iron - existing and to be cast around with light metal in the die casting process Em position pieces | |
US2620530A (en) * | 1945-02-07 | 1952-12-09 | United Engine & Machine Co | Manufacture of pistons |
DE901104C (en) * | 1949-11-10 | 1954-01-07 | Fairchild Engine And Airplane | Composite casting and process for its manufacture |
US2550879A (en) * | 1949-11-10 | 1951-05-01 | Fairchild Engine & Airplane | Bimetallic piston |
US2775493A (en) * | 1953-11-27 | 1956-12-25 | Gillett & Eaton Inc | Piston with head insert and process of making it |
JPS5125214B2 (en) * | 1973-02-09 | 1976-07-29 | ||
CH645562A5 (en) * | 1980-06-19 | 1984-10-15 | Sulzer Ag | Process for welding workpieces of nodular cast iron |
JPS59185567A (en) * | 1983-04-08 | 1984-10-22 | Usui Internatl Ind Co Ltd | Pretreatment of cast iron member joined by adhering |
IT1183114B (en) * | 1985-01-11 | 1987-10-05 | Ass Eng Italia | ALUMINUM OR ALUMINUM ALLOY PISTON FOR INTERNAL COMBUSTION ENGINES |
SU1507532A1 (en) * | 1987-10-13 | 1989-09-15 | Научно-исследовательский институт автотракторных материалов | Method of producing castings of piston with cast iron insert from aluminium alloy |
DE4010474A1 (en) * | 1990-03-31 | 1991-10-02 | Kolbenschmidt Ag | LIGHT METAL PISTON |
DE4019983A1 (en) * | 1990-06-22 | 1992-01-02 | Kolbenschmidt Ag | LIGHT METAL PISTON |
US5333668A (en) * | 1991-12-09 | 1994-08-02 | Reynolds Metals Company | Process for creation of metallurgically bonded inserts cast-in-place in a cast aluminum article |
DE4221448A1 (en) * | 1992-06-30 | 1994-01-13 | Mahle Gmbh | Reinforcement material for pistons of internal combustion engines |
-
1995
- 1995-10-11 DE DE19537847A patent/DE19537847A1/en not_active Withdrawn
-
1996
- 1996-09-20 US US09/051,050 patent/US6112802A/en not_active Expired - Fee Related
- 1996-09-20 DE DE59602965T patent/DE59602965D1/en not_active Expired - Fee Related
- 1996-09-20 WO PCT/DE1996/001808 patent/WO1997013597A2/en active IP Right Grant
- 1996-09-20 EP EP96945136A patent/EP0854763B1/en not_active Expired - Lifetime
- 1996-09-20 BR BR9610925A patent/BR9610925A/en not_active IP Right Cessation
- 1996-09-20 JP JP9514613A patent/JPH11514931A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9713597A3 * |
Also Published As
Publication number | Publication date |
---|---|
JPH11514931A (en) | 1999-12-21 |
WO1997013597A2 (en) | 1997-04-17 |
DE19537847A1 (en) | 1997-04-17 |
WO1997013597A3 (en) | 1997-06-05 |
BR9610925A (en) | 1999-06-29 |
EP0854763B1 (en) | 1999-09-01 |
US6112802A (en) | 2000-09-05 |
DE59602965D1 (en) | 1999-10-07 |
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