CN101014433B - Mould for casting a liquid metal and associated method - Google Patents

Mould for casting a liquid metal and associated method Download PDF

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Publication number
CN101014433B
CN101014433B CN2005800102269A CN200580010226A CN101014433B CN 101014433 B CN101014433 B CN 101014433B CN 2005800102269 A CN2005800102269 A CN 2005800102269A CN 200580010226 A CN200580010226 A CN 200580010226A CN 101014433 B CN101014433 B CN 101014433B
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CN
China
Prior art keywords
mould
discharge section
heat discharge
casting
cast
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Expired - Fee Related
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CN2005800102269A
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Chinese (zh)
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CN101014433A (en
Inventor
D·吉拉尔丹
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Saint Gobain PAM SA
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Saint Gobain PAM SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The inventive mould for casting a liquid metal comprises a shaped surface (24) corresponding to a castable product (16) surface and contacting the liquid metal. Said mould also comprises a heat removing part (10) made of a material whose thermal conductivity is greater than 150 W/mK. The invention can be used for producing cast-iron pipes.

Description

The mould and the correlation method of liquid metal are used to cast
Technical field
What the present invention relates to following type is used to cast the mould of liquid metal, the forming face that the mould of the type comprises corresponding to the surface of the product for the treatment of to make by casting and is used for contacting with this liquid metal.
This mould is particularly useful for making by casting the equipment of pipe.
Background technology
The known mould of making cast iron pipe by casting that is useful on.These moulds have the cylindrical general hollow shape around rotating shaft, and comprise the end corresponding to the flush end of pipe, and corresponding to the end of the socket end of pipe.The inner surface of this mould forms the outer surface of the pipe of manufacturing.
When making pipe, drive this mould around its rotation, and liquid metal is cast on the inner surface of this mould.This metal is cast to this flush end in proper order from this socket end.
Known mould is to be made by the low chrome steel, to bear the temperature of liquid steel.
Because the high temperature of liquid metal and the variation of mold temperature when a plurality of pipe of direct casting, at the inner surface of mould the crack can appear.Liquid metal can infiltrate these cracks during casting.Metal in the crack can hinder pipe to take out from mould, and causes the damage of mold outer surface.
When the crack surpassed preliminary dimension, this mould need be by carrying out machining or filling up the crack by welding and repair to inner surface.But these operations can change this inner surface, make the pipe of making through the mould of repairing may no longer satisfy required tolerance.
Thereby be limited the service life of known mould.
Known steel mold also has another defective.When the initial pipe of casting, there is very big plastic deformation in this steel mold.Therefore, the size of the mould of being produced need be considered this initial deformation.In order to make mould reach its required size, several pipes of then will casting are as six pipes.These pipes do not have required tolerance, and need be abandoned.Must make these " waste product " pipes causes the productive rate of casting equipment to reduce.
Summary of the invention
The object of the present invention is to provide a kind of mould of the liquid metal of casting, this mould has long service life, and can cast and have the member of closed tolerance.
For this reason, theme of the present invention is a kind of mould of the above-mentioned type, it is characterized in that, this mould comprises the heat discharge section of being made greater than the material of 150W/mK by thermal conductivity.
According to specific implementations, the present invention includes following one or more features:
-this material has the thermal conductivity greater than 300W/mK;
-this material has the thermal conductivity greater than 325W/mK;
-this heat discharge section is made by acid bronze alloy, and this acid bronze alloy especially comprises the copper that surpasses 50% weight;
-this acid bronze alloy comprises chromium, especially comprises the chromium of 0.25% to 2% weight;
-this acid bronze alloy comprises zirconium, especially comprises the zirconium of 0.05% to 0.25% weight;
-this heat discharge section forms at least a portion of the outer surface of this mould;
-this heat discharge section forms at least a portion of this forming face;
-this heat discharge section extends between this forming face and this outer surface in a continuous manner;
-this mould comprises cover layer, and this cover layer forms at least a portion of this forming face, and extends to this heat discharge section from this forming face;
-this cover layer and this hot type go out thermal coefficient of expansion that part has will make that under by the effect of casting metals, this tectal thermal expansion goes out the thermal expansion of part greater than this hot type;
-this cover layer is made by the big material of hardness that this hot type of hardness ratio goes out part, especially makes by chromium or nickel, or by making based on the alloy of chromium and/or nickel;
-this forming face is rotational symmetric around axle; And
-this mould is the mould of pipe.
The present invention also has a method that article are made in casting of passing through that themes as following type, and the method for the type comprises liquid metal is cast in step in the mould, it is characterized in that this mould is the mould as above-mentioned qualification.
The method according to this invention can comprise following feature:
-this metal is a cast iron, especially grey cast-iron or spheroidal graphite cast-iron; And
The feature of-this method also is the annealing steps by the article of casting manufacturing.
Description of drawings
The present invention may be better understood to the description that only provides as an example in conjunction with the accompanying drawings by following, and accompanying drawing is as follows:
Fig. 1 is the schematic diagram according to the manufacturing equipment of pipe of the present invention;
Fig. 2 represents the details drawing of equipment shown in Figure 1, with vast scale more this mould is shown;
Fig. 3 represents the partial sectional view of mould according to the present invention along the line II-II of Fig. 2;
Fig. 4 represents the version of mould as shown in Figure 3.
The specific embodiment
Fig. 1 represents the manufacturing equipment according to cast iron pipe of the present invention, and integral body is illustrated by Reference numeral 2.
This equipment 2 comprises container 4, pourers 6, running channel 8, rotary die 10, the withdrawing device 14 of cooling device 12 and production tube.This equipment 2 is used for making pipe 16.
This container 4 is by holding the crucible that the refractory material of the liquid metal of cast iron is for example made.
Pourers 6 is the tilting devices with a volume, and this volume is corresponding to the amount of making the required liquid metal of pipe 16.This tilting device can be used for receiving from the position of the liquid metal of this container and be used for liquid metal is poured between the position of this running channel 8 and.
Running channel 8 is to connect the groove of this pourers 6 to this mould 10, and this running channel comprises near inlet 20 that is arranged in the device 6 and the outlet 22 of extending at mould 10.Running channel 8 so that export 22 lowlyer than the position of inlet 20, thereby can make liquid cast owing to gravity flows with respect to tilting near the level.
Rotary die 10, be also referred to as " metal mold (coquille) ", has rotational symmetric shape, in this example for X-X being the cylinder bodily form roughly of axle, this axle is with respect to horizontal tilt, so that it is parallel in running channel 8. content below, statement " axially " and " radially " will provide with reference to this X-X. and this mould 10 has internal shaping face 24 and the cylinder bodily form outer surface 26 (referring to Fig. 2) as the negative surface of pipe 16. when casting, surface 26 does not contact with liquid metal. as shown in Figure 3, inner surface 24 is equipped with the driving of liquid metal 27. moulds 10 that cave in to comprise towards inlet 20 flush end end 28 and form the flush end of pipe 16 towards 30. flush end ends 28, inlet 20 rightabout socket end ends, and socket end end 30 forms the socket end of pipe 16.
Mould 10 can be driven by unshowned drive unit, around axle X-X rotation.In addition, mould 10 can be driven edge axle X-X in the translation between initial position and the casting end position of casting, and exports 22 facing to socket end end 30 at the casting initial position, exports 22 facing to flush end end 28 at the casting end position.
Cooling device 12 is flushers, and this device is suitable for cooling liquid such as water are sprayed on the outer surface 26 of mould 10.As version, device 12 can adopt known way to be made of water circulation system.
Withdrawing device 14 is applicable to the pipe 16 that axially takes out casting from mould 10.
Device 6,12 and 14, appearance suitable 4 and running channel 8 itself are known, therefore are not described in detail.
Mould 10 according to the present invention all is made of CuCrZr, and this is a kind of acid bronze alloy.This alloy comprises the copper that surpasses 50% weight, preferably surpasses the copper of 60% weight, and especially surpasses the copper of 75% weight.
In the example shown, it is by the alloy of copper, chromium and zirconium, and especially the alloy of secundum legem DIN 17666 constitutes.Specially suitable alloy comprises the chromium of 1% weight and the zirconium of 0.15% weight, and residue is copper and unavoidable impurities.This alloy has at 220 ℃ and is the average thermal conductivity of 340W/mK.
This alloy can comprise the chromium of 0.25% to 2% weight, and is preferably 0.5% to 1.5% weight.
This alloy can comprise the zirconium of 0.05% to 0.25% weight, and is preferably 0.10% to 0.20% weight.
According to the present invention, at least a portion of the material of mould 10 has the thermal conductivity greater than 150W/mK, especially greater than 300W/mK, and particularly greater than 325W/mK.
Making pipe 16 with equipment according to the present invention 2 implements by following mode.
Liquid cast corresponding to pipe 16 required cast iron amounts is introduced pourers 6 by crucible 4.
Then, mould 10 is driven the rotation around axle X-X, and makes this mould be in its casting initial position.
Then, this liquid cast is poured into running channel 8 by device 6, and this liquid cast flows and is poured into mould 10 in socket end end 30 along running channel 8.
Continuously, mould 10 is with to its casting end position.
Because centrifugal action, the liquid cast that is in this mould is pressed towards surface 24, and pipe 16 is solidified and formed to this liquid cast.
Because the high heat conductance of the material of mould 10, the thermograde between inner surface 24 and the outer surface 26 is low.In other words, the heat that is brought by liquid cast is arranged to surface 26 by surface 24 soon.Thereby, in mould 10, only produce very little thermal stress, this minimizing or avoided the appearance of crackle.Thereby mould 10 has the long life.
For example, be the mould 10 that the CuCrZr of the cast steel pig iron of 20mm and 1400 ℃ makes for having wall thickness, inner surface 24 reaches 150 ℃ temperature, and outer surface 26 reaches 100 ℃ temperature.Thereby thermograde is 50 ℃.The steel die of prior art causes about 580 ℃ thermograde under analogue.
Astoundingly, heat is discharged from inner surface 24 fast enough, thereby prevents that the temperature of this inner surface from can not reach the fusing point of this mold materials (about 1083 ℃).It is to be noted that the thermal conductivity of the material of this mould will be chosen as enough greatly usually, melts at surperficial 24 places to avoid this mould.
Cast iron solidifies in mould fast, and curing rate is 1.20mm/s to 0.80mm/s.Owing to solidify fast, the carbon that in this cast iron, is contained with 24 zones that contact, surface with Fe 3The form of C (cementite) is separated out, and in the zone away from surface 24, carbon exists with the graphite form basically. solidify thereby cause the big gradient of carbonization iron-graphite in pipe 16 fast. when annealing, cementite is converted into graphite, the outer surface of pipe 16 is heated quickly than its inner surface. thereby, for the required conversion ratio that cementite is converted into graphite, pipe 16 can be annealed at low temperatures, or annealing time is short. thereby mould 10 according to the present invention is particularly useful for casting by grey cast-iron or the article made by spheroidal graphite cast-iron.
In addition, after pipe 16 was removed, mould 10 reached its initial temperature fast.
Thereby can produce described pipe with fast speed.
Because solidify fast, mould 10 according to the present invention also causes the only slight local deformation of this tube outer surface.Thereby this pipe has better outward appearance.
When the pipe of casting initial, little according to the plastic deformation of mould 10 of the present invention.Even the initial pipe of so producing meets required size and can be used.Thereby this equipment has high production efficiency.
The version of mould shown in Figure 3 shown in Figure 4.Hereinafter, with the difference of only describing with respect to Fig. 3 mould, same member has adopted same Reference numeral.
Mould 10 is a composite die.This mould comprises outside heat discharge layer 40, and this layer forms outer surface 26, and inner protective layer 42, and this layer forms shaping inner surface 24.
Layer 40 is by the material manufacturing same with making above-mentioned mould 10.
Layer 42 is made by the big material of hardness ratio layer 40 hardness.For example it can be made by chromium or nickel, or is made by the alloy based on these metals.Layer 42 protective layer 40 avoid producing cut when pipe 16 takes out.
And the material coefficient of thermal expansion coefficient selection of layer 40 and 42 will make and heat the thermal expansion of the thermal expansion of the internal layer 42 that is caused greater than skin 40 by cast iron.Thereby when casting, internal layer 42 is pressed towards skin 40, and can not separate with this skin.
Usually, at least a portion that is used for discharging from forming face this mould of cast iron heat is made by the metal with high heat conductance, for example acid bronze alloy.
In a kind of version, the alloy of mould 10 or this heat discharge section is the acid bronze alloy that comprises a small amount of tellurium or small amount of silver and phosphorus.
In unshowned version, mould 10 comprises the heat discharge layer of the inside with high heat conductance, it forms at least a portion of inner surface 24, also comprise the skin of making by different materials, for example make by chromium or nickel or chromium and nickel, strengthening hardness, or make, to avoid forming fouling by chromium and zinc.
Although mould of the present invention is particularly useful for the cast iron pipe of casting, other article that it also can be cast and be made by other material.

Claims (19)

1. the mould of liquid metal is used to cast, the forming face (24) that the mould of the type comprises corresponding to the surface of the product for the treatment of to make by casting (16) and is used for contacting with this liquid metal, this mould comprises the heat discharge section of being made greater than the material of 150W/mK by thermal conductivity (10,40), it is characterized in that, this mould comprises cover layer (42), this cover layer forms at least a portion of forming face (24), and extend to this heat discharge section from forming face (24), this cover layer (42) is made by the big material of hardness of hardness ratio heat discharge section (40), and by chromium or nickel or by making based on the alloy of chromium and/or nickel.
2. the mould of claim 1 is characterized in that, this material has the thermal conductivity greater than 300W/mK.
3. the mould of claim 2 is characterized in that, this material has the thermal conductivity greater than 325W/mK.
4. the mould of one of claim 1～2 is characterized in that, this heat discharge section is made by acid bronze alloy.
5. the mould of claim 4 is characterized in that, this acid bronze alloy comprises the copper that surpasses 50% weight.
6. the mould of claim 4 is characterized in that, this acid bronze alloy comprises chromium.
7. the mould of claim 6 is characterized in that, this acid bronze alloy comprises the chromium of 0.25% to 2% weight.
8. the mould of claim 4 is characterized in that, this alloy comprises zirconium.
9. the mould of claim 8 is characterized in that, this alloy comprises the zirconium of 0.05% to 0.25% weight.
10. the mould of one of claim 1～2 is characterized in that, this heat discharge section forms at least a portion of the outer surface (26) of this mould.
11. the mould of one of claim 1～2 is characterized in that, this heat discharge section forms at least a portion of forming face (24).
12. the mould of claim 10 is characterized in that, this heat discharge section forms at least a portion of forming face (24), and this heat discharge section extends between forming face (24) and outer surface (26) in a continuous manner.
13. the mould of claim 1 is characterized in that, the thermal coefficient of expansion that cover layer (42) and this heat discharge section (40) have will make that under by the effect of casting metals, the thermal expansion of cover layer (42) is greater than the thermal expansion of heat discharge section (40).
14. the mould of one of claim 1～2 is characterized in that, forming face (24) is rotational symmetric around axle (X-X).
15. the mould of claim 14 is characterized in that, this mould is the mould of pipe.
16. make the method for article by casting, the method for the type comprises liquid metal is cast in step in the mould, it is characterized in that this mould is the mould (10) of one of aforesaid right requirement.
17. the method for claim 16 is characterized in that, this metal is a cast iron.
18. the method for claim 17 is characterized in that, this cast iron is grey cast-iron or spheroidal graphite cast-iron.
19. the method for claim 16 or 17 is characterized in that described method also comprises the annealing steps of the article of making by casting.
CN2005800102269A 2004-04-01 2005-03-30 Mould for casting a liquid metal and associated method Expired - Fee Related CN101014433B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0403444 2004-04-01
FR0403444A FR2868346B1 (en) 2004-04-01 2004-04-01 MOLD FOR CASTING LIQUID METAL AND CORRESPONDING METHOD
PCT/FR2005/000777 WO2005097376A2 (en) 2004-04-01 2005-03-30 Mould for casting a liquid metal and associated method

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CN101014433A CN101014433A (en) 2007-08-08
CN101014433B true CN101014433B (en) 2010-05-05

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EP (1) EP1732718A2 (en)
CN (1) CN101014433B (en)
BR (1) BRPI0508751B1 (en)
FR (1) FR2868346B1 (en)
WO (1) WO2005097376A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921854B1 (en) * 2007-10-09 2011-04-15 Saint Gobain Pont A Mousson POWDER DELIVERY DEVICE, CASTING PLANT AND CORRESPONDING METHOD
CN113523190B (en) * 2021-07-13 2023-09-22 福建省立新船舶工程有限公司 Processing device and processing method for ship tail shaft bearing sleeve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR722732A (en) * 1930-09-15 1932-03-24 Centrifugal casting process for shell hollow bodies
GB469794A (en) * 1935-12-10 1937-08-03 Buderus Eisenwerk Improvements in centrifugal chill moulds for casting metals
US4616690A (en) * 1983-01-06 1986-10-14 Societe Francaise D'electrometallurgie-Sofrem Process and apparatus for moulding ingots of ferro-alloys by chill casting in a cooled copper mould
CH658008A5 (en) * 1980-11-26 1986-10-15 Fischer Ag Georg Permanent mould for casting metals, process for making it and its use
US5119865A (en) * 1990-02-20 1992-06-09 Mitsubishi Materials Corporation Cu-alloy mold for use in centrifugal casting of ti or ti alloy and centrifugal-casting method using the mold
US5194339A (en) * 1989-06-02 1993-03-16 Sugitani Kinzoku Kogyo Kabushiki Kaisha Discontinuous casting mold

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1454030A (en) * 1965-08-19 1966-07-22 Ct De Rech S De Pont A Mousson Foundry mold coating process and resulting mold
DE2737631A1 (en) * 1977-08-20 1979-03-01 Bosch Gmbh Robert PERMANENT FORM FOR CAST IRON MOLD CASTING
JPH01138099A (en) * 1987-11-26 1989-05-30 Tanaka Kikinzoku Kogyo Kk Production of ag-cu-ti alloy brazing filler metal for joining ceramics
US5039477A (en) 1989-06-02 1991-08-13 Sugitani Kinzoku Kogyo Kabushiki Kaisha Powdered metal spray coating material
DE4136076C2 (en) * 1991-10-30 2003-04-10 Chuetsu Metal Works Process for producing a continuous casting mold material
JP3025476B2 (en) * 1997-05-23 2000-03-27 松下電器産業株式会社 Semiconductor integrated circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR722732A (en) * 1930-09-15 1932-03-24 Centrifugal casting process for shell hollow bodies
GB469794A (en) * 1935-12-10 1937-08-03 Buderus Eisenwerk Improvements in centrifugal chill moulds for casting metals
CH658008A5 (en) * 1980-11-26 1986-10-15 Fischer Ag Georg Permanent mould for casting metals, process for making it and its use
US4616690A (en) * 1983-01-06 1986-10-14 Societe Francaise D'electrometallurgie-Sofrem Process and apparatus for moulding ingots of ferro-alloys by chill casting in a cooled copper mould
US5194339A (en) * 1989-06-02 1993-03-16 Sugitani Kinzoku Kogyo Kabushiki Kaisha Discontinuous casting mold
US5119865A (en) * 1990-02-20 1992-06-09 Mitsubishi Materials Corporation Cu-alloy mold for use in centrifugal casting of ti or ti alloy and centrifugal-casting method using the mold

Also Published As

Publication number Publication date
FR2868346B1 (en) 2007-10-19
CN101014433A (en) 2007-08-08
BRPI0508751B1 (en) 2015-07-28
BRPI0508751A (en) 2007-08-21
EP1732718A2 (en) 2006-12-20
WO2005097376A3 (en) 2006-05-26
WO2005097376A2 (en) 2005-10-20
FR2868346A1 (en) 2005-10-07

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