EP1099768A1 - Procédé de fabrication d'une fonte a graphite spheroidal brute de coulee bainitique - Google Patents
Procédé de fabrication d'une fonte a graphite spheroidal brute de coulee bainitique Download PDFInfo
- Publication number
- EP1099768A1 EP1099768A1 EP00403023A EP00403023A EP1099768A1 EP 1099768 A1 EP1099768 A1 EP 1099768A1 EP 00403023 A EP00403023 A EP 00403023A EP 00403023 A EP00403023 A EP 00403023A EP 1099768 A1 EP1099768 A1 EP 1099768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molds
- bainitic
- cooling
- metal alloy
- parts
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 9
- 229910001018 Cast iron Inorganic materials 0.000 title description 9
- 239000010439 graphite Substances 0.000 title description 6
- 229910002804 graphite Inorganic materials 0.000 title description 6
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 10
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 3
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 21
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 238000007531 graphite casting Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000011733 molybdenum Substances 0.000 abstract description 2
- 239000010703 silicon Substances 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 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 abstract 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 6
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910001563 bainite Inorganic materials 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 239000002054 inoculum Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
Definitions
- the present invention relates to a method for manufacturing a cast iron crude spheroidal graphite (GS) of bainitic casting, as well as its application to the manufacture of crankshafts.
- GS cast iron crude spheroidal graphite
- the parts thus obtained on leaving the foundry have a structure perlitic and it is only after an appropriate known heat treatment (Revue FFA 106 June-July 1991) known as stepped quenching, comprising five phases distinct and produced on raw parts or in the course of machining just after the roughing operations and before finishing, that the bainitic transformation is carried out.
- stepped quenching comprising five phases distinct and produced on raw parts or in the course of machining just after the roughing operations and before finishing, that the bainitic transformation is carried out.
- the present invention therefore essentially aims to overcome all heat treatment of the bainitic stepped quenching type and to overcome the disadvantages of the methods mentioned above, and relates to a method obtaining a GS cast iron with a final bainitic structure in the raw casting state.
- the process according to the invention authorizing the absence of heating and high maintenance temperature (Austenitization), avoids deformation and leads to better dimensional accuracy of parts.
- Step (i) of developing the liquid metal alloy of the process according to the invention is carried out in a 25-ton low-frequency induction furnace according to the so-called Tap and Charge method, where every 3600 kg of the liquid metal alloy at a temperature of 1500 ° C, we immediately recharge the same amount of solid charge through skips.
- the subjects entering the melting bed are: returns of crankshafts (jets and rejects) 40%, the remainder being provided by steel conditioned in the form of packets of compacted sheets.
- the weight values of elements of the alloy are given to ⁇ 0.05% after spectrometric analysis on parts.
- the preferred chemical compositions used are the following: %VS %Yes % Mn % Cu %Or % Mo 3.50 2.40 0.25 0.80 2.00 1.00 and %VS %Yes % Mn % Cu %Or % Mo 3.50 2.40 0.25 0.80 3.00 0.50
- the nickel and / or molybdenum contents may vary in the range of 2-3% and 0.5-1% respectively, depending on the size, the shape and massiveness of the parts that one wishes to manufacture.
- Step (ii) of spheroidization takes place in the 3600 kg bag according to the Tundish cover process, i.e. the products are arranged at the bottom of pocket just before the removal of the metal alloy, first with a Ferro-Silico-Calcium-Magnesium mixture (36 kg), then covered with a inoculant such as Ferro-Silicon (10 kg), itself covered with steel under shape of ribbons used as cover. Spheroidization thus takes place in the pocket known as spheroidizing treatment during transfer to the area of casting.
- the molding step (iii) of the process according to the present invention is preferably carried out according to the technique of soda silica soda hardened with carbon dioxide (CO 2 ), for example using a molding machine 4-station carousel, commercially available from OSBORN.
- CO 2 carbon dioxide
- the mold advantageously consists of two parts symmetrical separated by the common downpipe. In each part are arranged two crankshafts with a common central flyweight feeding the parts by the second crankpin. The fact of weighting makes it possible to guarantee a fault-free part.
- the casting is advantageously carried out vertically.
- step (iv) of the process according to the invention the mold after its casting is transported to an appropriate cooling tunnel at a speed of controlled cooling.
- a tunnel is for example that sold by the SIETAM company.
- crankshaft cluster is advantageously separated from the sand at using a vibrating grid placed after the cooling line.
- the bainitic transformation and that advantageously the crankshaft more precisely has a structure composed of upper bainite, a once this one has arrived.
- the parameters for molding and developing the metal alloy are the same as those described above.
- Half a mold is instrumented with 4 thermocouples per crankshaft, arranged in more or less massive areas in the upper parts and bottom of the mold.
- the structure is composed of bainite (see Figure 2) with the presence of solidifying carbides at the cell joints, these not exceeding not 1%, but can in some places form a network.
- the cooling curve is as shown in Figure 1.
- the tail of the crankshaft followed closely by the chainring are the first parts to reach the bainitic area after 3.5 h and the first to leave it 2.5 hours later.
- the slower parts are the bearings as well as the crankpins, the bainitic zone being reached 4.5 hours after pouring, and the exit being made also after 2.5 h.
- the parameters for molding and developing the metal alloy are the same as those described above.
- a half-mold is instrumented as in Example 1.
- a spheroidal graphite is obtained, with approximately 270 spheroids / mm 2 and always degenerate graphite and heterogeneities in the sizes of nodules.
- the structure is composed of upper bainite with the presence of ferrite around the nodules (see Figure 3).
- the concentration of end carbides solidification in cell joint has disappeared to make room for a few isolated carbides.
- the shape of the cooling curves is identical to that of Example 1, which confirms that the parts that cool the most quickly are the trays and the tails. These parts cross the temperature of 450 ° C after 3.5 h after pouring, and 2.5 h later temperature of 350 ° C. As for the more massive parts, the start of reaction theoretical only 4.5 hours after pouring, the reaction is completed 2.5 hours later.
- the two previous examples confirm that the residence time / cooling in the mold necessary to obtain crankshafts fully bainitic is at least 5 h before being able to proceed with the unhook.
- the method according to the present invention for producing parts, such as crankshafts for example, in GS cast iron with a higher bainitic matrix has the advantage of being less expensive while being as efficient as a process using forged steel.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Heat Treatment Of Articles (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Forging (AREA)
Abstract
Description
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,50 | 2,40 | 0,30 | 0,70 | 1 | 0,25 |
- traitement de sphéroïdisation suivi d'une inoculation graphitisante,
- de coulée et de moulage,
- de refroidissement et de
- parachèvement avant usinage.
- la méthode de refroidissement dans le moule jusqu'à température
ambiante :
Cette méthode est présentée comme étant d'application limitée. La forte teneur en éléments d'alliage mis en oeuvre dans cette méthode génère des surcoûts ainsi que des hétérogénéités de structure dans les pièces, avec de la ferrite dans les parties massives et de la martensite dans les minces. - la technique du décochage à chaud :
L'idée essentielle est de réaliser un décochage à chaud du moule, lorsque la température des pièces avoisine 900 °C. Elles sont transférées immédiatement dans un four de traitement à température d'austénitisation. Le reste du traitement restant inchangé c'est à dire l'homogénéisation et la trempe en bain de sels ou sur lit fluidisé à 350 °C pendant 30 à 120 min.
- la technique de décochage à chaud à 900 °C suivie d'un refroidissement à l'air calme jusqu'à la température de 400 °C. A cette température les pièces sont immergées dans de la vermiculite afin de refroidir le plus lentement possible simulant ainsi le maintien en bain de sels. Ce mode de traitement permet d'obtenir une structure bainitique à condition d'avoir une fonte suffisamment riche en élément d'alliage pour la massivité de la pièce.
- (i) élaborer un alliage métallique liquide de composition chimique choisie,
- (ii) procéder à un traitement de sphéroïdisation,
- (iii) réaliser des moules,
- (iv) couler l'alliage métallique liquide dans les moules, et
- (v) refroidir les moules coulés placés sur un équipement mobile dans un dispositif à vitesse de refroidissement contrôlée,
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,30 à 3,60 | 2,30 à 2,60 | 0,20 à 0,40 | 0,80 | 2,00 à 3,00 | 0,50 à 1,00 |
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,50 | 2,40 | 0,25 | 0,80 | 2,00 | 1,00 |
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,50 | 2,40 | 0,25 | 0,80 | 3,00 | 0,50 |
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,50 | 2,40 | 0,30 | 0,80 | 2,00 | 1,00 |
%C | %Si | %Mn | %Cu | %Ni | %Mo |
3,50 | 2,40 | 0,30 | 0,80 | 3,00 | 0,50 |
Claims (5)
- Procédé de fabrication de pièces en fonte à graphite sphéroïdal bainitique brute de coulée, comprenant les étapes suivantes consistant à(i) élaborer un alliage métallique liquide de composition chimique choisie,(ii) procéder à un traitement de sphéroïdisation(iii) réaliser des moules(iv) couler l'alliage métallique liquide dans les moules(v) refroidir les moules coulés placés sur un équipement mobile dans un dispositif de refroidissement à vitesse contrôlée,
%C %Si %Mn %Cu %Ni %Mo 3,30 à 3,60 2,30 à 2,60 0,20 à 0,40 0,80 2,0 à 3,0 0,5 à 1,0 - Procédé selon la revendication 1, caractérisé en ce que l'étape (ii) est réalisée avant le transfert vers l'aire de coulée en disposant, en fond de poche juste avant le prélèvement de l'alliage métallique, un mélange Ferro-Silico-Calcium-Magnésium, qu'on recouvre ensuite par un mélange de Ferro-Silicium, lui-même recouvert d'acier.
- Procédé selon la revendication lou 2, caractérisé en ce que l'étape (iii) est effectuée au moyen de sable au silicate de soude durci au dioxyde de carbone (CO2).
- Procédé selon l'une quelconque des revendications précédentes caractérisé en ce que la coulée de l'alliage métallique dans les moules a lieu verticalement.
- Application du procédé selon l'une quelconque des revendications précédentes à la fabrication de vilebrequins.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9914111A FR2800752B1 (fr) | 1999-11-10 | 1999-11-10 | Procede de fabrication d'une fonte a graphite spheroidal brute de coulee bainitique |
FR9914111 | 1999-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1099768A1 true EP1099768A1 (fr) | 2001-05-16 |
EP1099768B1 EP1099768B1 (fr) | 2004-08-25 |
Family
ID=9551950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00403023A Expired - Lifetime EP1099768B1 (fr) | 1999-11-10 | 2000-10-31 | Procédé de fabrication d'une fonte a graphite spheroidal brute de coulee bainitique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1099768B1 (fr) |
AT (1) | ATE274603T1 (fr) |
DE (1) | DE60013226T2 (fr) |
FR (1) | FR2800752B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2918908A1 (fr) * | 2007-07-16 | 2009-01-23 | C T I F Ct Tech Des Ind De La | Procede de fabrication d'une piece en fonte bainitique |
CN101927499B (zh) * | 2009-06-23 | 2012-08-01 | 上海华新合金有限公司 | 机器人底座铸件的铸造方法 |
CN107552726A (zh) * | 2017-09-27 | 2018-01-09 | 安徽海立精密铸造有限公司 | 一种新型曲轴铸造工艺 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005058532B4 (de) * | 2005-12-08 | 2008-09-04 | Daimler Ag | Verfahren zur anpassungsfähigen Prozesssteuerung für die Herstellung von Gusseisen |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860457A (en) * | 1972-07-12 | 1975-01-14 | Kymin Oy Kymmene Ab | A ductile iron and method of making it |
DE2647129A1 (de) * | 1976-10-19 | 1978-04-20 | Arenco Bmd Maschfab | Giesserei-kuehlanlage |
DE2846574A1 (de) * | 1978-10-26 | 1980-05-08 | Babcock Ag | Verwendung eines gusseisens mit kugelgraphit |
US4541878A (en) * | 1982-12-02 | 1985-09-17 | Horst Muhlberger | Cast iron with spheroidal graphite and austenitic-bainitic mixed structure |
DE3639658A1 (de) * | 1986-11-20 | 1988-06-01 | Horst Dipl Phys Dr Muehlberger | Verfahren zur herstellung von gussstuecken aus gusseisen mit kugelgraphit |
JPH0987797A (ja) * | 1995-09-28 | 1997-03-31 | Nippon Steel Corp | 高強度ダクタイル鋳鉄材 |
-
1999
- 1999-11-10 FR FR9914111A patent/FR2800752B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-31 DE DE60013226T patent/DE60013226T2/de not_active Expired - Fee Related
- 2000-10-31 AT AT00403023T patent/ATE274603T1/de not_active IP Right Cessation
- 2000-10-31 EP EP00403023A patent/EP1099768B1/fr not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860457A (en) * | 1972-07-12 | 1975-01-14 | Kymin Oy Kymmene Ab | A ductile iron and method of making it |
DE2647129A1 (de) * | 1976-10-19 | 1978-04-20 | Arenco Bmd Maschfab | Giesserei-kuehlanlage |
DE2846574A1 (de) * | 1978-10-26 | 1980-05-08 | Babcock Ag | Verwendung eines gusseisens mit kugelgraphit |
US4541878A (en) * | 1982-12-02 | 1985-09-17 | Horst Muhlberger | Cast iron with spheroidal graphite and austenitic-bainitic mixed structure |
DE3639658A1 (de) * | 1986-11-20 | 1988-06-01 | Horst Dipl Phys Dr Muehlberger | Verfahren zur herstellung von gussstuecken aus gusseisen mit kugelgraphit |
JPH0987797A (ja) * | 1995-09-28 | 1997-03-31 | Nippon Steel Corp | 高強度ダクタイル鋳鉄材 |
Non-Patent Citations (2)
Title |
---|
HASSE S: "BAINITISCHES GUSSEISEN MIT KUGELGRAPHIT - EIN WERKSTOFF MIT OPTIMALEN EIGENSCHAFTSKOMBINATIONEN", GIESSEREI-PRAXIS,DE,SCHIELE & SCHON. BERLIN, no. 7/08, 1997, pages 152 - 160, XP000196964 * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2918908A1 (fr) * | 2007-07-16 | 2009-01-23 | C T I F Ct Tech Des Ind De La | Procede de fabrication d'une piece en fonte bainitique |
CN101927499B (zh) * | 2009-06-23 | 2012-08-01 | 上海华新合金有限公司 | 机器人底座铸件的铸造方法 |
CN107552726A (zh) * | 2017-09-27 | 2018-01-09 | 安徽海立精密铸造有限公司 | 一种新型曲轴铸造工艺 |
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Publication number | Publication date |
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FR2800752B1 (fr) | 2002-02-08 |
FR2800752A1 (fr) | 2001-05-11 |
DE60013226D1 (de) | 2004-09-30 |
DE60013226T2 (de) | 2005-09-22 |
ATE274603T1 (de) | 2004-09-15 |
EP1099768B1 (fr) | 2004-08-25 |
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