US3786552A - Method of manufacturing a composite bimetallic sleeve for a die-casting machine - Google Patents
Method of manufacturing a composite bimetallic sleeve for a die-casting machine Download PDFInfo
- Publication number
- US3786552A US3786552A US00266749A US3786552DA US3786552A US 3786552 A US3786552 A US 3786552A US 00266749 A US00266749 A US 00266749A US 3786552D A US3786552D A US 3786552DA US 3786552 A US3786552 A US 3786552A
- Authority
- US
- United States
- Prior art keywords
- sleeve
- die
- alloys
- outer layer
- iron
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2023—Nozzles or shot sleeves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/49865—Assembling or joining with prestressing of part by temperature differential [e.g., shrink fit]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
Definitions
- a sleeve is composed of a relatively thin inner layer made of such highly infusible material as molybdenum, tungsten or their alloys, and an outer layer made of an iron-base alloy.
- a mixture of powders compounded to form an iron-base alloy when heated is compacted to cylindrical shape around a ho]- low cylinder suitably molded of one of the listed metals and alloys. The compact is then sintered to provide an outer layer of the iron-base alloy solidly united with the hollow cylinder.
- This invention relates generally to die-casting machines, and in particular to an improved sleeve for use in injecting molten metal into the mold cavity of a diecasting machine.
- the invention is also directed to a novel process for the manufacture of the improved sleeve.
- the art of die-casting has been widely utilized to produce precision-made castings of metals or alloys with a melting point of about 1,000C or less, such alloys including those of aluminum, zinc, magnesium, copper, tin, and lead.
- die-casting machines There are two known types of die-casting machines, the cold chamber type and the hot chamber" type.
- the cold-chamber machine to which molten metal is supplied from a separately installed melting furnace, is employed for the die-casting of comparatively high melting-point metals or alloys such as aluminum-, magnesiumand copper-base alloys.
- the hotchamber machine having a built-in furnace, is used to produce castings of lower melting-point metals or alloys such as zinc-, tinand lead-base alloys. In both types, molten metal or alloy is forced into the die cavity through a cylindrical sleeve built into the machines.
- the sleeve especially that of the cold-chamber machine, which contacts the molten metal at its highest temperature, so that it is required to be particularly heat-, wearand corrosion-resisting. This is all the more so because in recent years the application of the die-casting machines to iron-base alloys have been seriously attempted.
- the sleeve of the cold-chamber machine has been made of a hotdie steel. This material is so unsatisfactory in regard to the aforementioned properties that the sleeve has a service life of from about 1 to 3 months or so when used for die-casting of aluminum-base alloy having a relatively low melting point.
- the alloy steel is a comparatively expensive material as compared with ordinary steel,
- tungsten or their alloys is sprayed onto the inner surface of a conventionally available sleeve, because the coating thus formed cannot possibly be sufficiently united with the surrounding sleeve material. It may also be contemplated to tightly fix, as by the process of shrinking-on, a hollow cylinder of a ferrous alloy or the like around a thin pipe of the highly infusible metals or alloys. As the sleeve manufactured in this manner is heated in actual die-casting operation, however, its inner and outer layers are certain to be displaced relative to each other.
- Another object of the invention is to provide a sleeve of the class referred to, in which the outer layer is made of a ferrous alloy such that heat to be released from molten metal passing ther'ethrough can be properly controlled.
- a further object of the invention is to provide a sleeve of the class referred to, in which the outer layer serves to protect the inner layer, which may be less resistant to oxidation, from deterioration due to the oxidative influence from its periphery.
- a sleeve for use in a die-casting machine comprising an inner layer made of material selected from the group consisting of molybdenum, tungsten and alloys containing at least one of the metals as the principal constituent, and an outer layer made of a ferrous alloy, the inner layer and outer layer being solidly united with each other.
- the invention further provides a process for the manufacture of a sleeve for use in a die-casting machine, which comprises providing a hollow cylinder made of material selected from the group consisting of molybdenum, tungsten and alloys containing at least one of said metals as the principal constituent, compacting a mixture of powders to cylindrical shape around the hollow cylinder, the mixture of powders being compounded to form a ferrous alloy when heated, sintering the compact to form an outer layer solidly united with BRIEF DESCRIPT ION OF DRAWINGS
- a process for the manufacture of a sleeve for use in a die-casting machine which comprises providing a hollow cylinder made of material selected from the group consisting of molybdenum, tungsten and alloys containing at least one of said metals as the principal constituent, compacting a mixture of powders to cylindrical shape around the hollow cylinder, the mixture of powders being compounded to form a ferrous alloy when heated, sintering the compact to form an
- FIG. 1 is a schematic vertical sectional view showing one form of die-casting operation in a cold-chamber type machine by way of explanation of this invention
- FIG. 2 is a schematic longitudinal sectional view of a two-layered sleeve according to the invention.
- FIG. 3 is a schematic longitudinal sectional view explanatory of the way pressures are applied for compaction of an outer layer around a previously formed inner layer;
- FIG. 4 is a microscopic representation showing an example of diffusive junction between the inner and outer layers of a sleeve according to the invention
- FIG. 5 shows the dimensional specifications of an example of a sleeve constructed according to the invention for use in an 80-ton die-casting machine
- FIG. 6 also shows the dimensional specifications of another sleeve constructed according to the invention for use in a 250-ton die-casting machine.
- the sleeve contacts the molten metal at its highest temperature, so that it must be made of material which is sufficiently heat-, wearand corrosion-resistant.
- this sleeve has been made of a hot-die steel casehardened by the so-called nitriding process. It must be noted, however, that the temperature of the molten metal or alloy being cast in the cold-chamber machine is higher than the temperature of that being cast in the hot-chamber machine.
- the sleeve of the cold-chamber die-casting machine is thus placed under particularly hard working conditions. It is an admitted fact in the art that sleeves made of a casehardened hot-die steel cannot last for any extended period of use when incorporated in the cold-chamber machines.
- FIG. 2 schematically illustrates this improved sleeve, comprising an inner layer 4a made of one of the aforesaid metals or alloys and an outer layer 4b made of a sintered ferrous alloy.
- the invention provides an improved sleeve, and a process for the manufacture thereof, which is composed of substantially completely integral inner and outer layers, the inner layer being capable of withstanding the high temperatures of the molten metal in a die-casting machine, and the outer layer being made of inexpensive material to reduce the overall cost of the sleeve.
- the thusstructured sleeve is confirmed to be extremely durable, as hereinafter set forth in more concrete terms.
- molybdenum, tungsten, and their alloys are very expensive, so that these metals or alloys may preferably be used in as small amounts as possible to further decrease the sleeve cost.
- the inner layer of the sleeve may be used as the inner layer of the sleeve a thin pipe of molybdenum or molybdenumbase alloy which has been available conventionally.
- This pipe can considerably reduce the thickness of the sleeve inner layer, does not cause any technical problem in the manufacture of the two-layered sleeve, and improves its corrosion-resistivity.
- the trouble is the high manufacturing cost of the pipe itself, which must undergo highly involved steps of production, so that the sleeve cost is not reduced as much as it is desired to be.
- a thin, as-sintered pipe of molybdenum, tungsten, or alloys containing one or both of these metals as the principal constituent is, of course, employable as the sleeve inner layer when machined into specific dimensions.
- This pipe is less expensive than the abovedescribed pipe of molybdenum or molybdenum-base alloy and thus serves to reduce the sleeve cost.
- the compact is then roasted, if necessary, and thereafter is sintered at a temperature suitably determined according to its composition, usually in the range of from about 1,250 to l,800C.
- a temperature suitably determined according to its composition usually in the range of from about 1,250 to l,800C.
- the dimensions of the sintered product tend to deviate from the specifications. This is avoidable only through careful control of such factors as the composition of the material, the placement of the compact in the sintering furnace, and its sintering temperature.
- any of the aforementioned alloys thus used as the sleeve inner layer con tains too much diffusion phase, it will be less resistant to corrosion.
- the alloy contains too great quantities of nickel, iron, cobalt and other constituents, with the result that about 10 percent or more by volume of diffusion phase having a melting point considerably lower than that of the base is produced, then it will be highly reactive with the molten metal to be supplied for the die-casting operation.
- the cylindrical sinter obtained as above may be further subjected to some postsintering operation to provide a product of the prescribed dimensions. It must be noted, however, that if the sintered metal or alloy has about percent or more by volume of fine particles of refractory oxides, nitrides, carbides or the like dispersed therein, its strength will be considerably descreased. The cutting and grinding operations that may be necessary for finishing the cylindrical sinter will then be greatly hampered.
- a mixture of powders capable of forming an iron-base alloy when heated is compacted, as illustrated in FIG. 3, and thereafter is sintered in a temperature range of from about 900 to 1,300C.
- equal pressures are simultaneously applied from both sides of the powders, through the inner layer 4a and through a rubber covering 8, so that the thin inner layer 4a is not subjected to any substantial deformation.
- FIG. 4 is a microscopic representation of such a junction obtained at about 1,250C between molybdenum-base alloy [Mo (balance) 0.48 wt.% Ti 0.08 wt.% Zr and sintered iron-base alloy [Fe (balance) 2 wt.% Ni 0.5 wt.% Mo 0.5 wt.% C]. It will be clearly observed that the porosity of the sintered iron-base alloy 11 decreases toward the interface between the same and the molybdenum-base alloy 10, and that these two layers are strongly united.
- the interface between such inner and outer layers is known to offer a resistive pressure of from about 5 to kilograms per square millimeter against shearing.
- the composition of the ferrous alloy and its sintering temperature be well regulated so that the outer layer molded of that ferrous alloy will contract linearly within the range of from about 0.2 to 10 percent upon sintering; and (2) this outer layer be compacted with as few irregularities as possible in density.
- the outer layer While the outer layer must contact linearly about 0.2 percent or more upon sintering to be sufficiently united with the inner layer, the outer layer tends to be cracked if the contraction exceeds about 10 percent. Cracks are likewise developed on the outer layer if it suffers nonuniform length-wise contraction due to densityirregularities suggested in (2) above. Provision of a thin nickel layer at the interface between the two layers will serve to further strengthen their junction.
- the density control of the outer layer may be effected by carefully regulating the composition of the mixture of iron and other powders as well as its sintering conditions, or by employing the technique of copper impregnation. It is one of the advantages of this invention that by the same density control of the outer layer, its heat conductivity is regulatable so that heat to be released from molten metal within the sleeve can be appropriately predetermined. If desired, the inner surface of the sleeve inner layer may be carburized to form an additional carbide layer, while the outer layer may he further reinl'm't'cd with n nhrunkam ateel cylinder or covering.
- the two-layered sleeve of this invention manufactured as hereinabove described, was built into a diecasting machine to test its durability when placed in contact with molten aluminum-, copperand iron-base alloys. No signs of abnormality were observed in this sleeve when up to 10,000, 5,000 and 1,000 shots respectively of these alloys were die-cast, although these figures are subject to some variation depending upon the material of the sleeve inner layer.
- the hollow cylindrical compact thus formed was then roasted at about 750C for 2 hours in the presence of hydrogen and thereafter was sintered at about 1,350C for 5 hours to provide a highly dense product with an outer diameter of 50 millimeters, an inner diameter of 36 millimeters, and a length of 260 millimeters.
- the outer surface of this sintered product was machined to an outer diameter of 46 millimeters.
- the two-layered hollow cylinder thus obtained was machined to the dimensions set forth in FIG. 5, for use as a sleeve in an 80-ton type die-casting machine.
- the sleeve was built into the die-casting machine, which had been in actual operation in a plant, to test its durability. No abnormality was exhibited at the moment when the sleeve had undergone up to 10,000 shots during die-casting operations.
- EXAMPLE II A sleeve was manufactured in substantial accordance with Example I, except that its inner layer was composed of molybdenum-base alloy (further containing l'.5 wt.% nickel and 1.5 wt.% iron), and that the sintering temperature of the inner layer was set to about l,400C. This sleeve was built into a die-casting machine for aluminumand copper-base alloys. No abnormality was observed when up to 10,000 and 1,000 shots respectively of the said alloys were cast.
- molybdenum-base alloy further containing l'.5 wt.% nickel and 1.5 wt.% iron
- Nickel was plated to a thickness of about 1 p. on the outer surface of a hollow cylinder molded of molybdenum-base alloy [Mo (balance) 0.48 wt.% Ti 0.08 wt.% Zr], the hollow cylinder having an outer diameter of 63.6 millimeters, an inner diameter of 59.6 millimet ers, and a length of 330 millimeters.
- Mo (balance) 0.48 wt.% Ti 0.08 wt.% Zr molybdenum-base alloy
- the hollow cylinder having an outer diameter of 63.6 millimeters, an inner diameter of 59.6 millimet ers, and a length of 330 millimeters.
- a mixture of 97.8 wt.% of iron powder, 2 wt.% of nickel powder, and 0.2 wt.% of graphite powder was compacted to cylindrical shape around the above plated cylinder with a hydrostatic press at pressures up to 2 tons per square centimeter. The compact
- a composite bimetallic sleeve for a die-casting machine wherein said sleeve consists of an inner layer made of refractory metal materials such as molybdenum, tungsten, and alloys containing therein at least one of these metals as the principal constituent, and an outer layer made of a ferrous alloy, said layers being diffusion bonded at their boundary region
- the improvement which comprises compacting a mixture of powders in a cylindrical shape around the outer periphery of a hollow cylinder of refractory metal which constitutes the inner layer to a thickness greater than the thickness of said hollow cylinder, said mixture of powders being a mixture which will form the ferrous alloy by heat-treatment, thereafter sintering said compacted mixture of powders on said cylinder to form a composite structure consisting of an outer ferrous alloy layer solidly metallurgically bonded to said hollow cylinder, and finally machining the thus produced composite structure to desired dimensions.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4728971 | 1971-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3786552A true US3786552A (en) | 1974-01-22 |
Family
ID=12771116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00266749A Expired - Lifetime US3786552A (en) | 1971-06-30 | 1972-06-27 | Method of manufacturing a composite bimetallic sleeve for a die-casting machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US3786552A (fr) |
CH (1) | CH553018A (fr) |
DE (1) | DE2231807C3 (fr) |
FR (1) | FR2143939B1 (fr) |
GB (1) | GB1371827A (fr) |
IT (1) | IT959995B (fr) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4379575A (en) * | 1973-10-09 | 1983-04-12 | Raychem Corporation | Composite coupling |
US4455041A (en) * | 1975-04-09 | 1984-06-19 | Raychem Corporation | Heat recoverable composite coupling device with tapered insert |
US4469357A (en) * | 1975-04-09 | 1984-09-04 | Raychem Corporation | Composite coupling |
US20140029710A1 (en) * | 2011-04-10 | 2014-01-30 | The Governors Of The University Of Alberta | Production of technetium from a molybdenum metal target |
US9623542B1 (en) | 2006-10-10 | 2017-04-18 | Us Synthetic Corporation | Methods of making a polycrystalline diamond compact including a polycrystalline diamond table with a thermally-stable region having at least one low-carbon-solubility material |
US9643293B1 (en) | 2008-03-03 | 2017-05-09 | Us Synthetic Corporation | Methods of fabricating a polycrystalline diamond body with a sintering aid/infiltrant at least saturated with non-diamond carbon and resultant products such as compacts |
US9663994B2 (en) | 2006-11-20 | 2017-05-30 | Us Synthetic Corporation | Polycrystalline diamond compact |
EP3184203A1 (fr) * | 2015-12-23 | 2017-06-28 | Wieland-Werke AG | Chambre de remplissage pour une machine de coulée sous pression |
US20170266719A1 (en) * | 2016-03-21 | 2017-09-21 | Purdue Research Foundation | Hot-chamber die casting systems and methods |
US9808910B2 (en) | 2006-11-20 | 2017-11-07 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US9951566B1 (en) | 2006-10-10 | 2018-04-24 | Us Synthetic Corporation | Superabrasive elements, methods of manufacturing, and drill bits including same |
US10155301B1 (en) | 2011-02-15 | 2018-12-18 | Us Synthetic Corporation | Methods of manufacturing a polycrystalline diamond compact including a polycrystalline diamond table containing aluminum carbide therein |
US10301882B2 (en) | 2010-12-07 | 2019-05-28 | Us Synthetic Corporation | Polycrystalline diamond compacts |
WO2020229588A1 (fr) * | 2019-05-14 | 2020-11-19 | Weldstone Components GmbH | Substrats métalliques sujets à usure revêtus et procédé de fabrication de ceux-ci |
US20220072605A1 (en) * | 2020-09-10 | 2022-03-10 | Qingyou Han | Process for making a composite liner for cold chamber die casting application |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH681068A5 (fr) * | 1989-12-22 | 1993-01-15 | Htm Ag | |
DE4201781C2 (de) * | 1991-01-24 | 1996-05-30 | Tokyo Yogyo Kk | Einspritzteil für eine Druckgußmaschine |
DE19838561A1 (de) * | 1998-08-25 | 2000-03-02 | Wolfram Ind Mbh Ges | Gießform für das Gießen von Formteilen aus Nicht-Eisenmetallen |
DE102017011321B3 (de) | 2017-12-08 | 2019-05-16 | Wieland-Werke Ag | Füllkammer für eine Druckgießmaschine |
CN111659895B (zh) * | 2020-07-21 | 2022-03-11 | 马鞍山市格澜新材料科技有限公司 | 一种金属热压铸生产工艺及其使用的金属材料配方 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US464165A (en) * | 1891-12-01 | Cam or gear and blan k therefor | ||
US1989186A (en) * | 1932-10-05 | 1935-01-29 | Bats Jean Hubert Louis De | Method of forming rolls |
US3014266A (en) * | 1956-09-21 | 1961-12-26 | United States Pipe Foundry | Method for making and repairing rolls |
US3109224A (en) * | 1960-10-11 | 1963-11-05 | Mueller Brass Co | Method of making bearing pins |
US3672881A (en) * | 1969-11-03 | 1972-06-27 | Carmet Co | Method of making powder composites |
US3678567A (en) * | 1970-06-18 | 1972-07-25 | Int Nickel Co | Production of clad metal articles |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6600281U (fr) * | 1900-01-01 | Frech O Werkzeugbau | ||
DE958073C (de) * | 1953-02-10 | 1957-02-14 | Dr Hermann Franssen | Verfahren und Vorrichtung zum Plattieren von Rundprofilen durch Aufpressen von Pulver und Sintern |
GB773009A (en) * | 1954-10-04 | 1957-04-17 | Plasco Ltd | Apparatus for use in forming die-castings from high melting point metals |
DE1458296A1 (de) * | 1962-03-03 | 1969-02-27 | Texas Instruments Inc | Verfahren und Einrichtung zum Herstellen eines ummantelten Kerns |
-
1972
- 1972-06-27 US US00266749A patent/US3786552A/en not_active Expired - Lifetime
- 1972-06-28 CH CH966872A patent/CH553018A/fr not_active IP Right Cessation
- 1972-06-28 IT IT2636072A patent/IT959995B/it active
- 1972-06-29 GB GB3041972A patent/GB1371827A/en not_active Expired
- 1972-06-29 DE DE2231807A patent/DE2231807C3/de not_active Expired
- 1972-06-30 FR FR7223798A patent/FR2143939B1/fr not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US464165A (en) * | 1891-12-01 | Cam or gear and blan k therefor | ||
US1989186A (en) * | 1932-10-05 | 1935-01-29 | Bats Jean Hubert Louis De | Method of forming rolls |
US3014266A (en) * | 1956-09-21 | 1961-12-26 | United States Pipe Foundry | Method for making and repairing rolls |
US3109224A (en) * | 1960-10-11 | 1963-11-05 | Mueller Brass Co | Method of making bearing pins |
US3672881A (en) * | 1969-11-03 | 1972-06-27 | Carmet Co | Method of making powder composites |
US3678567A (en) * | 1970-06-18 | 1972-07-25 | Int Nickel Co | Production of clad metal articles |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4379575A (en) * | 1973-10-09 | 1983-04-12 | Raychem Corporation | Composite coupling |
US4455041A (en) * | 1975-04-09 | 1984-06-19 | Raychem Corporation | Heat recoverable composite coupling device with tapered insert |
US4469357A (en) * | 1975-04-09 | 1984-09-04 | Raychem Corporation | Composite coupling |
US4836586A (en) * | 1975-04-09 | 1989-06-06 | Raychem Corporation | Composite coupling |
US4874193A (en) * | 1975-04-09 | 1989-10-17 | Raychem Corporation | Heat-recoverable composition coupling device |
US4951978A (en) * | 1975-04-09 | 1990-08-28 | Raychem Corporation | Heat-recoverable composition coupling device |
US9623542B1 (en) | 2006-10-10 | 2017-04-18 | Us Synthetic Corporation | Methods of making a polycrystalline diamond compact including a polycrystalline diamond table with a thermally-stable region having at least one low-carbon-solubility material |
US9951566B1 (en) | 2006-10-10 | 2018-04-24 | Us Synthetic Corporation | Superabrasive elements, methods of manufacturing, and drill bits including same |
US9808910B2 (en) | 2006-11-20 | 2017-11-07 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US9663994B2 (en) | 2006-11-20 | 2017-05-30 | Us Synthetic Corporation | Polycrystalline diamond compact |
US9643293B1 (en) | 2008-03-03 | 2017-05-09 | Us Synthetic Corporation | Methods of fabricating a polycrystalline diamond body with a sintering aid/infiltrant at least saturated with non-diamond carbon and resultant products such as compacts |
US10301882B2 (en) | 2010-12-07 | 2019-05-28 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US10309158B2 (en) | 2010-12-07 | 2019-06-04 | Us Synthetic Corporation | Method of partially infiltrating an at least partially leached polycrystalline diamond table and resultant polycrystalline diamond compacts |
US10155301B1 (en) | 2011-02-15 | 2018-12-18 | Us Synthetic Corporation | Methods of manufacturing a polycrystalline diamond compact including a polycrystalline diamond table containing aluminum carbide therein |
US20140029710A1 (en) * | 2011-04-10 | 2014-01-30 | The Governors Of The University Of Alberta | Production of technetium from a molybdenum metal target |
EP3184203A1 (fr) * | 2015-12-23 | 2017-06-28 | Wieland-Werke AG | Chambre de remplissage pour une machine de coulée sous pression |
US20170266719A1 (en) * | 2016-03-21 | 2017-09-21 | Purdue Research Foundation | Hot-chamber die casting systems and methods |
WO2020229588A1 (fr) * | 2019-05-14 | 2020-11-19 | Weldstone Components GmbH | Substrats métalliques sujets à usure revêtus et procédé de fabrication de ceux-ci |
CN113966255A (zh) * | 2019-05-14 | 2022-01-21 | 韦尔斯通组件有限责任公司 | 经涂覆的、易磨损的金属基底及其制造方法 |
US20220072605A1 (en) * | 2020-09-10 | 2022-03-10 | Qingyou Han | Process for making a composite liner for cold chamber die casting application |
US12017271B2 (en) * | 2020-09-10 | 2024-06-25 | Qingyou Han | Process for making a composite liner for cold chamber die casting application |
Also Published As
Publication number | Publication date |
---|---|
FR2143939A1 (fr) | 1973-02-09 |
DE2231807B2 (de) | 1981-05-07 |
DE2231807A1 (de) | 1973-01-18 |
GB1371827A (en) | 1974-10-30 |
IT959995B (it) | 1973-11-10 |
DE2231807C3 (de) | 1982-01-14 |
CH553018A (fr) | 1974-08-30 |
FR2143939B1 (fr) | 1974-12-27 |
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