US3364976A - Method of casting employing self-generated vacuum - Google Patents

Method of casting employing self-generated vacuum Download PDF

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Publication number
US3364976A
US3364976A US437581A US43758165A US3364976A US 3364976 A US3364976 A US 3364976A US 437581 A US437581 A US 437581A US 43758165 A US43758165 A US 43758165A US 3364976 A US3364976 A US 3364976A
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United States
Prior art keywords
mold
metal
magnesium
casting
cast
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Expired - Lifetime
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US437581A
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English (en)
Inventor
John N Reding
Marvin R Bothwell
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Dow Chemical Co
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Dow Chemical Co
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Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to US437581A priority Critical patent/US3364976A/en
Priority to DE19661508821 priority patent/DE1508821A1/de
Priority to NL6602441A priority patent/NL6602441A/xx
Priority to GB8494/66A priority patent/GB1144873A/en
Priority to FR51469A priority patent/FR1470259A/fr
Priority to NO161951A priority patent/NO115451B/no
Priority to SE02869/66A priority patent/SE340508B/xx
Priority to BE677385D priority patent/BE677385A/xx
Application granted granted Critical
Publication of US3364976A publication Critical patent/US3364976A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • B22D17/14—Machines with evacuated die cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • ABSTRACT OF THE DISCLOSURE A novel process of casting wherein a mold, unvented to the atmosphere but containing at least one mold cavity opening, is at least partially filled with an atmosphere which reacts with the molten metal to be cast therein to produce an oxidized form of the metal in condensed solid form.
  • the mold cavity opening and metal to be cast are brought into contact with each other thereby to provide reaction between the atmosphere in the mold and the metal thus assuring substantially complete vacuum filling of the mold cavity.
  • This invention relates to the casting of metals and more particularly concerns a novel method of vacuum casting metals, particularly light metals.
  • FIGURE 1 illustrates one embodiment of a mold operable in the present process.
  • FIGURE 2 is a sectional view taken along line 22 of FIGURE 1.
  • FIGURE 3 shows a mold submerged in a bath of molten metal.
  • a mold 10 unvented to the atmosphere, but containing at least one mold cavity opening 12, is provided.
  • the mold cavity 14 is filled at least partially with an atmosphere which reacts with the molten metal 16 to be cast to produce an oxidized form of the metal 16 in condensed solid form.
  • the mold cavity opening 12 and metal 16 to be cast are brought into contact with each other whereupon substantially complete filling of the mold cavity 14 occurs.
  • Operability requires that all vents or openings in the mold 10 that communicate with the atmosphere external to the mold 10 be below the surface of the molten metal 16 being cast when the mold 10 and melt are in contact.
  • the actual contact time between the metal and mold required to prepare castings by the present novel process will vary from operation to operation dependent on the shape and size of the mold openings and mold cavity to be filled, rate of reactivity between the atmosphere in the mold and metal being cast and the like factors.
  • ordinarily sound castings are realized at contact times ranging from 30 seconds or less to about several hours or more and usually from about a minute to about 2 hours.
  • casting times Preferably, in ordinary operations casting times of from about 1 minute to about 1 hour are used.
  • contact of the mold with the metal for extended periods of time after casting is complete is not detrimental.
  • a mold constructed of non-porous material, such as graphite, hard carbon, mild steel, or cast iron with any joined surfaces thereof being relatively tight fitting, and having a predetermined mold cavity configuration.
  • This mold contains a mold cavity opening of such size in relation to the cavity size that filling can be accomplished therethrough, the cavity opening however being sufliciently small to restrict loss of the molten metal, regardless of the position of the opening relative to the cavity, within a reasonable time after the cast metal starts to cool and solidify.
  • the mold cavity is filled with a gas reactive with the metal to be cast and which produces a condensed solid oxidized form of the metal which has a low vapor 1 pressure at the melt temperature of the molten metal to be cast.
  • the mold ordinarily is heated to a temperature which assures that the metal will remain molten as it enters the mold during the casting operation.
  • the heating can be accomplished by immersing the mold itself in the 3 melt, or by applying heat to the mold by methods known a method for casting light metals without the need of using large and numerous risers other than those required to compensate for normal shrinkage.
  • the molten metal is transported to the mold to accomplish filling, for example, by a ladle, or a feed pipe. After filling has been accomplished, the heat is removed either by withdrawing the heat source or withdrawing the mold out of the melt bath. After cooling of the mold and solidification of cast metal, the casting in accordance with standard foundry practices, usually is removed from the mold and further cooled.
  • the mold cavity of the mold described directly hereinbefore can be a single hollow chamber or can consist of a mold form having a multiplicity of passages. Additionally, the hollow mold cavity can contain a variety of porous media which are thermally stable and not detrimentally attacked at process temperatures and which have interconnected channels and passages. Examples of suitable mold fillers are compacted particulate materials and powders, felts, wools, sponges, bundles of wires and thin rods, fibers and the like. The use of such fillers provides a ready means for producing metal impregnated compacts, metal filled composite structures, etc.
  • Particulate fillers which have been found to be suitable for use in the preparation of metal impregnated composites of the light metals such as magnesium include, for example, steel and iron wires, iron and steel felts, iron and steel wools, particulate refractory powders such as Carborundum (silicon carbide), Alundum (aluminum oxide), asbestos fibers, refractory metals (tungsten, molybdenum and tantalum) in the form of wires, fibers, powders and the like, carbon fibers, powdered, particulate and fibrous boron, etc.
  • Carborundum silicon carbide
  • Alundum oxide aluminumundum oxide
  • asbestos fibers refractory metals (tungsten, molybdenum and tantalum) in the form of wires, fibers, powders and the like, carbon fibers, powdered, particulate and fibrous boron, etc.
  • an integral porous body of a refractory material, metal or the like material as described hereinbefore having interconnected pores can be used directly as a mold form.
  • the porous material ordinarily is entirely submerged Within the melt for a predetermined period of time.
  • the mold member can be fitted with a gas and liquid tight sheath or cover, the bottom or another small portion being left open. The open portion of the mold is immersed into or contacts the melt during casting operations.
  • This embodiment also is a particularly effective means for producing metal impregnated compacts and metal filled composite structures.
  • One particularly useful composite resulting from this latter embodiment is a magnesium impregnated sponge iron.
  • This material can find utility as an article of manufacture for introducing magnesium smoothly and controllably into ferrous based melts, e.g. for desulfurization and producing nodular iron.
  • a prime advantage of the present composition is that no foreign materials, e.g. carbon or refractory material are introduced into the ferrous melt being treated. With this material, and depending on the porosity of the sponge iron, composites containing 30 percent or more by weight magnesium can be prepared.
  • the actual gas or vapor atmosphere required within a mold cavity for a given casting operation will depend upon the metal being cast since the mold atmosphere must be a gas or combination of gases and/or vapors which will react with the liquid metal surface of the casting melt to form a condensed, solid, low volatility product, such as the oxide or nitride of the metal being cast.
  • the reaction of liquid magnesium with oxygen and nitrogen in air present within the mold gives a small quantity of solid magnesium oxide and magnesium nitride and thereby simultaneously generate a vacuum sufficient to cause substantially complete filling of the mold.
  • Example 1 A split graphite mold having a single .mold cavity and fitted with a removable lid was provided. When the two mold members were clamped shut, the two mold members were clamped shut, the
  • Example 2 The procedural steps described for Example 1 were repeated using a shaped cast iron mold, with magnesium as the melt. Examination of the cooled, solidified product indicated that the magnesium substantially filled the mold cavity; only the normal shrinkage volume remained unfilled.
  • Example 3 A steel mold having a rectangular 4 in. x 4 in. x in. thick mold cavity and a inch diameter aperture in one end was filled with dried 500 mesh US. Standard Sieve silicon carbide abrasive grains. These were tamped in the mold and the mold cover then fastened in place. The mold and its contents were preheated at about 1300 F. for about 15 minutes. After this time, the mold was completely submerged in a melt of AZ91A magnesium base alloy (ASTM designation) for about 15 minutes, the melt being maintained at about 1300 F.
  • ASTM designation AZ91A magnesium base alloy
  • Example 4 The inch diameter by 1% inch long cylindrical mold cavity of a graphite mold was filled with dried, crystalline boron powder having a maximum size of 200 mesh, US. Standard Sieve. This mold had a Mr inch mold cavity opening. The powder was tamped into the mold to obtain tight packing. The mold and its contents were preheated at 1300 F. for 15 minutes and then were immersed in a molten AZ91A magnesium base alloy maintained at about 1300" F. for about 1.5 hours. The mold was removed from the melt and cooled. Examination of the solidified product indicated this to be a sound casting wherein AZ 91A alloy filled substantially all of the interstices of the original boron powder charge.
  • Example 5 A 1.5 inch diameter by 2 inch long can shaped cylindrical steel mold was filled with dried, minus 200 mesh (U.S. Standard Sieve) aluminum oxide abrasive grains. The mold was then fitted with a cap having a inch mold cavity opening. The mold and contents were preheated at about 1300 F. for about 1 hour and then immersed in molten AZ91A magnesium base alloy at about 1300 F. for about 1 hour. After removal from the melt and solidification, the composite was found to be sound with AZ91A alloy filling substantially all of the powder interstices.
  • U.S. Standard Sieve U.S. Standard Sieve
  • Example 6.227 stainless steel cables each containing 2l0.005 inch diameter wires were compressed into a bundle about inch in diameter by about 2 inches long.
  • An open-ended thin metal tubing, as a mold wall, was then placed around the bundle.
  • About 60 percent by volume of the resulting enclosed bundle was metal.
  • the wires were substantially cylindrically closepacked corresponding to about 90% by volume of each cable occupied by wire.
  • the resulting sheathed cable bundle was preheated at about 1200 F. for about 20 minutes and then totally submerged in molten, commercially pure magnesium at about 1350 F. for about 30 minutes. Examination of a cross-section of the resulting composite indicated that all interstices including those between the cylindrically close-packed wires of the cable strands were filled with magnesium.
  • Example 7 Fine steel wool was compressed into a tubular /2 inch diameter by 2 inch long steel mold to about 35 percent of its theoretical density. The mold and contents were preheated for about 15 minutes at about 1200 F. and then totally submerged for about 10 minutes in molten magnesium maintained at about 1350 F. After cooling and solidification the resulting composite was found to be sound with magnesium filling substantially all of the interstices in the steel wool.
  • Example 8-Foundry coke was preheated for about 2 minutes at about 1000 F. and then totally submerged in molten magnesium for about minutes at about 1300 F. After cooling and solidification, it was found upon examination of the resulting composite product that the magnesiimi had filled substantially all of the pores of the coke.
  • Example 9 An irregularly shaped chunk of sponge iron about 2 inches on a side and having a very fine porosity was preheated at about 1200 F. for about 30 minutes. The heated chunk was totally submerged for about 30 minutes in molten magnesium at about 1350 F. Following this period the chunk of sponge iron was removed from the melt and cooled to solidify the magnesium. Examination of a section of the resulting product showed that magnesium had filled substantially all of the pores of the sponge iron.
  • the sponge iron-magnesium compact contained about 33 percent by weight magnesium. This is equivalent to about 67 percent by volume of magnesium.
  • Example 10 A bottle-shaped Vycor glass mold was filled with dried, 80 mesh (U.S. Standard Sieve) silicon carbide abrasive grains and the whole preheated at about 1300 F. for about one hour. The bottle-shaped mold was totally submerged in an aluminum base alloy containing about 5 percent magnesium maintained at about 1400 F. for about two hours. The resulting product after cooling and solidification was found to be a sound casting with 6 the aluminum based alloy filling substantially all of the interstices of the particulate silicon carbide matrix.
  • U.S. Standard Sieve U.S. Standard Sieve
  • Example 11 A steel cylindrical mold having one closed end with a /s inch mold cavity opening and a defining mold cavity of about /2 inch diameter and about 6 inches long was filled with dried silicon car-bide abrasive grains (500 mesh, U.S. Standard Sieve). These were tamped Ito provide a dense porous mass and the open end of the mold then crimped tightly to seal off the mold cavity.
  • the so-filled mold was preheated to a temperature of about 1700 F. for about 30 minutes.
  • the heated mold was submerged in a melt of AZ91A magnesium base all-0y at about 1300 F. and maintained therein for about one minute.
  • the mold was removed from the melt and cooled.
  • the resulting compact upon examination was found to he a substantially void free composite of the magnesium alloy and silicon carbide, the magnesium filling the interstices between the silicon car-bide particles.
  • the composite had a density of 2.45 grams per cubic centimeter. This is indicative of a casting having about 46 volume percent silicon carbide and about 54 volume percent of the magnesium alloy.
  • a method of casting metals which comprises; providing a molten metal bath, providing a mold, said mold containing at least one mold cavity opening communicating with the mold cavity and the exterior of the mold, said mold cavity containing an atmosphere which is at least partially reactive with a molten metal being cast in said mold, said atmosphere forming a condensed solid oxidized form of said metal by reaction with said metal, contacting the mold cavity opening with said molten metal while maintaining all openings of the mold which communicate with the atmosphere external to the mold below the surface of the molten metal bath being cast, maintaining said mold opening and said molten metal in contact for a predetermined period of time, causing said mold atmosphere to react with said molten metal thereby to produce a condensed solid oxidized form of said metal and to :genenate a vacuum in said mold sutlicient to cause substantially complete filling of the mold with said molten metal separating the mold from contact with the molten metal bath and cooling and solidifying the resulting metal product cast in said mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Mold Materials And Core Materials (AREA)
US437581A 1965-03-05 1965-03-05 Method of casting employing self-generated vacuum Expired - Lifetime US3364976A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US437581A US3364976A (en) 1965-03-05 1965-03-05 Method of casting employing self-generated vacuum
DE19661508821 DE1508821A1 (de) 1965-03-05 1966-02-04 Giessereiverfahren
NL6602441A NL6602441A (ru) 1965-03-05 1966-02-24
GB8494/66A GB1144873A (en) 1965-03-05 1966-02-25 Process of casting metals
FR51469A FR1470259A (fr) 1965-03-05 1966-03-01 Procédé de moulage des métaux
NO161951A NO115451B (ru) 1965-03-05 1966-03-04
SE02869/66A SE340508B (ru) 1965-03-05 1966-03-04
BE677385D BE677385A (ru) 1965-03-05 1966-03-04

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US437581A US3364976A (en) 1965-03-05 1965-03-05 Method of casting employing self-generated vacuum

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US3364976A true US3364976A (en) 1968-01-23

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US437581A Expired - Lifetime US3364976A (en) 1965-03-05 1965-03-05 Method of casting employing self-generated vacuum

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US (1) US3364976A (ru)
BE (1) BE677385A (ru)
DE (1) DE1508821A1 (ru)
GB (1) GB1144873A (ru)
NL (1) NL6602441A (ru)
NO (1) NO115451B (ru)
SE (1) SE340508B (ru)

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396777A (en) * 1966-06-01 1968-08-13 Dow Chemical Co Process for impregnating porous solids
US3529655A (en) * 1966-10-03 1970-09-22 Dow Chemical Co Method of making composites of magnesium and silicon carbide whiskers
US3849879A (en) * 1973-10-01 1974-11-26 Dow Chemical Co Method of making a composite magnesium-titanium conductor
US3867177A (en) * 1972-01-05 1975-02-18 Dow Chemical Co Impregnation of porous body with metal
US3992200A (en) * 1975-04-07 1976-11-16 Crucible Inc. Method of hot pressing using a getter
US4475581A (en) * 1981-01-31 1984-10-09 Klockner-Werke Ag Method and apparatus for fabricating glad ingots
US4492265A (en) * 1980-08-04 1985-01-08 Toyota Jidosha Kabushiki Kaisha Method for production of composite material using preheating of reinforcing material
US4802524A (en) * 1980-07-30 1989-02-07 Toyota Jidosha Kabushiki Kaisha Method for making composite material using oxygen
US4828008A (en) * 1987-05-13 1989-05-09 Lanxide Technology Company, Lp Metal matrix composites
EP0324706A2 (en) * 1988-01-11 1989-07-19 Lanxide Technology Company, Lp. Method of making metal matrix composites
EP0369930A1 (en) * 1988-11-10 1990-05-23 Lanxide Technology Company, Lp. A method for forming a metal matrix composite body by an outside-in spontaneous infiltration process
US4935055A (en) * 1988-01-07 1990-06-19 Lanxide Technology Company, Lp Method of making metal matrix composite with the use of a barrier
EP0409763A2 (en) * 1989-07-18 1991-01-23 Lanxide Technology Company, Lp A method of forming metal matrix composite bodies by a self-generated vacuum process
US4998578A (en) * 1988-01-11 1991-03-12 Lanxide Technology Company, Lp Method of making metal matrix composites
US5004036A (en) * 1988-11-10 1991-04-02 Lanxide Technology Company, Lp Method for making metal matrix composites by the use of a negative alloy mold and products produced thereby
US5010945A (en) * 1988-11-10 1991-04-30 Lanxide Technology Company, Lp Investment casting technique for the formation of metal matrix composite bodies and products produced thereby
EP0427658A2 (en) * 1989-11-07 1991-05-15 Lanxide Technology Company, Lp Method of forming metal matrix composite bodies by a self-generated vacuum process, and products produced therefrom
US5040588A (en) * 1988-11-10 1991-08-20 Lanxide Technology Company, Lp Methods for forming macrocomposite bodies and macrocomposite bodies produced thereby
US5119864A (en) * 1988-11-10 1992-06-09 Lanxide Technology Company, Lp Method of forming a metal matrix composite through the use of a gating means
US5141819A (en) * 1988-01-07 1992-08-25 Lanxide Technology Company, Lp Metal matrix composite with a barrier
US5163499A (en) * 1988-11-10 1992-11-17 Lanxide Technology Company, Lp Method of forming electronic packages
US5165463A (en) * 1988-11-10 1992-11-24 Lanxide Technology Company, Lp Directional solidification of metal matrix composites
US5172747A (en) * 1988-11-10 1992-12-22 Lanxide Technology Company, Lp Method of forming a metal matrix composite body by a spontaneous infiltration technique
US5188164A (en) * 1989-07-21 1993-02-23 Lanxide Technology Company, Lp Method of forming macrocomposite bodies by self-generated vacuum techniques using a glassy seal
US5197528A (en) * 1988-11-10 1993-03-30 Lanxide Technology Company, Lp Investment casting technique for the formation of metal matrix composite bodies and products produced thereby
US5224533A (en) * 1989-07-18 1993-07-06 Lanxide Technology Company, Lp Method of forming metal matrix composite bodies by a self-generated vaccum process, and products produced therefrom
US5240062A (en) * 1988-11-10 1993-08-31 Lanxide Technology Company, Lp Method of providing a gating means, and products thereby
US5247986A (en) * 1989-07-21 1993-09-28 Lanxide Technology Company, Lp Method of forming macrocomposite bodies by self-generated vacuum techniques, and products produced therefrom
US5267601A (en) * 1988-11-10 1993-12-07 Lanxide Technology Company, Lp Method for forming a metal matrix composite body by an outside-in spontaneous infiltration process, and products produced thereby
US5277989A (en) * 1988-01-07 1994-01-11 Lanxide Technology Company, Lp Metal matrix composite which utilizes a barrier
US5280819A (en) * 1990-05-09 1994-01-25 Lanxide Technology Company, Lp Methods for making thin metal matrix composite bodies and articles produced thereby
US5287911A (en) * 1988-11-10 1994-02-22 Lanxide Technology Company, Lp Method for forming metal matrix composites having variable filler loadings and products produced thereby
US5298283A (en) * 1990-05-09 1994-03-29 Lanxide Technology Company, Lp Method for forming metal matrix composite bodies by spontaneously infiltrating a rigidized filler material
US5301738A (en) * 1988-11-10 1994-04-12 Lanxide Technology Company, Lp Method of modifying the properties of a metal matrix composite body
US5303763A (en) * 1988-11-10 1994-04-19 Lanxide Technology Company, Lp Directional solidification of metal matrix composites
US5311919A (en) * 1988-11-10 1994-05-17 Lanxide Technology Company, Lp Method of forming a metal matrix composite body by a spontaneous infiltration technique
US5316069A (en) * 1990-05-09 1994-05-31 Lanxide Technology Company, Lp Method of making metal matrix composite bodies with use of a reactive barrier
US5329984A (en) * 1990-05-09 1994-07-19 Lanxide Technology Company, Lp Method of forming a filler material for use in various metal matrix composite body formation processes
US5361824A (en) * 1990-05-10 1994-11-08 Lanxide Technology Company, Lp Method for making internal shapes in a metal matrix composite body
US5487420A (en) * 1990-05-09 1996-01-30 Lanxide Technology Company, Lp Method for forming metal matrix composite bodies by using a modified spontaneous infiltration process and products produced thereby
US5501263A (en) * 1990-05-09 1996-03-26 Lanxide Technology Company, Lp Macrocomposite bodies and production methods
US5505248A (en) * 1990-05-09 1996-04-09 Lanxide Technology Company, Lp Barrier materials for making metal matrix composites
US5518061A (en) * 1988-11-10 1996-05-21 Lanxide Technology Company, Lp Method of modifying the properties of a metal matrix composite body
US5526867A (en) * 1988-11-10 1996-06-18 Lanxide Technology Company, Lp Methods of forming electronic packages
US5526914A (en) * 1994-04-12 1996-06-18 Lanxide Technology Company, Lp Brake rotors, clutch plates and like parts and methods for making the same
US5544121A (en) * 1991-04-18 1996-08-06 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device
US5620791A (en) * 1992-04-03 1997-04-15 Lanxide Technology Company, Lp Brake rotors and methods for making the same
US5848349A (en) * 1993-06-25 1998-12-08 Lanxide Technology Company, Lp Method of modifying the properties of a metal matrix composite body
US5851686A (en) * 1990-05-09 1998-12-22 Lanxide Technology Company, L.P. Gating mean for metal matrix composite manufacture
WO2001046486A1 (fr) * 1999-12-21 2001-06-28 Hitachi Metals, Ltd. Procede de production d'un materiau composite a base de metal
US6722417B2 (en) * 2000-04-10 2004-04-20 Nissin Kogyo Co., Ltd. Deoxidation casting, aluminium casting and casting machine
US6745816B2 (en) 2000-05-10 2004-06-08 Nissin Kogyo Kabushiki Kaisha Method of casting and casting machine
KR20160071284A (ko) 2014-12-11 2016-06-21 이건배 알루미늄 기지 복합재료의 제조방법 및 이에 의하여 제조된 알루미늄 기지 복합재료
CN106890983A (zh) * 2015-12-18 2017-06-27 比亚迪股份有限公司 浸渗装置及具有其的浸渗系统

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US2671955A (en) * 1950-12-14 1954-03-16 Mallory & Co Inc P R Composite metal-ceramic body and method of making the same
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US3166415A (en) * 1960-12-28 1965-01-19 Union Carbide Corp Magnesium-based alloys
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1053880A (en) * 1911-03-31 1913-02-18 Campbell Scott Process of impregnating.
US1555978A (en) * 1920-08-26 1925-10-06 American Magnesium Corp Metal stock
US2192792A (en) * 1938-07-28 1940-03-05 Gen Motors Corp Method of sintering and impregnating porous metal briquettes
US2665999A (en) * 1950-04-18 1954-01-12 Gen Motors Corp Method of impregnation
US2671955A (en) * 1950-12-14 1954-03-16 Mallory & Co Inc P R Composite metal-ceramic body and method of making the same
US2881068A (en) * 1952-04-28 1959-04-07 Wargons Ab Method of treating a ferrous melt with a porous sintered metal body impregnated with a treating agent
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Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396777A (en) * 1966-06-01 1968-08-13 Dow Chemical Co Process for impregnating porous solids
US3529655A (en) * 1966-10-03 1970-09-22 Dow Chemical Co Method of making composites of magnesium and silicon carbide whiskers
US3867177A (en) * 1972-01-05 1975-02-18 Dow Chemical Co Impregnation of porous body with metal
US3849879A (en) * 1973-10-01 1974-11-26 Dow Chemical Co Method of making a composite magnesium-titanium conductor
US3992200A (en) * 1975-04-07 1976-11-16 Crucible Inc. Method of hot pressing using a getter
US4802524A (en) * 1980-07-30 1989-02-07 Toyota Jidosha Kabushiki Kaisha Method for making composite material using oxygen
US4492265A (en) * 1980-08-04 1985-01-08 Toyota Jidosha Kabushiki Kaisha Method for production of composite material using preheating of reinforcing material
US4475581A (en) * 1981-01-31 1984-10-09 Klockner-Werke Ag Method and apparatus for fabricating glad ingots
US4828008A (en) * 1987-05-13 1989-05-09 Lanxide Technology Company, Lp Metal matrix composites
US5856025A (en) * 1987-05-13 1999-01-05 Lanxide Technology Company, L.P. Metal matrix composites
US5395701A (en) * 1987-05-13 1995-03-07 Lanxide Technology Company, Lp Metal matrix composites
US4935055A (en) * 1988-01-07 1990-06-19 Lanxide Technology Company, Lp Method of making metal matrix composite with the use of a barrier
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DE1508821A1 (de) 1969-11-06
NO115451B (ru) 1968-10-07
GB1144873A (en) 1969-03-12
SE340508B (ru) 1971-11-22
NL6602441A (ru) 1966-09-06

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