WO2014159318A1 - Methods for solventless bonding of metallurgical compositions - Google Patents
Methods for solventless bonding of metallurgical compositions Download PDFInfo
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- WO2014159318A1 WO2014159318A1 PCT/US2014/023002 US2014023002W WO2014159318A1 WO 2014159318 A1 WO2014159318 A1 WO 2014159318A1 US 2014023002 W US2014023002 W US 2014023002W WO 2014159318 A1 WO2014159318 A1 WO 2014159318A1
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- powder
- binding agent
- weight
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- metallurgical
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/108—Mixtures obtained by warm mixing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
Definitions
- the present invention is directed to solventless methods for bonding metallurgical powder compositions.
- Coating or bonding of metal powders is important for improving performance of the powders, as well as for reducing dusting during handling of powder mixtures.
- Methods for coating or bonding powder mixtures have been previously described. See, e.g., U.S. Patent Nos. 2,648,609; 3, 117,027; 4,731,195; 6,280,683; and 6,602,315.
- Some of these bonding methods use a combination of high shear and high applied pressure to coat powder particles with polymers or waxes. These methods can cause agglomeration of the powder, producing a web like structure.
- the powder is fluidized and then coated with binding materials that are dissolved in a solvent. Typically, the binding materials are in a solution comprising 75%-95%, by weight, of solvent. After the particles of the powder are coated, the solvent must be removed - a process which can be time consuming, costly, and dangerous since many of the solvents used are flammable liquids.
- the present invention is directed to methods of preparing a bonded
- the present invention also includes bonded metallurgical powder compositions prepared using these methods, as well as compacted powder metallurgical parts prepared using them.
- the present invention provides improved methods for bonding, that is, particle- coating, to produce non-agglomerated, coated particles. These methods use substantially no solvent to produce bonded metallurgical powder compositions.
- bonded metallurgical powder compositions can be prepared by heating a binding agent, in the substantial absence of solvent, to a temperature at or above the melting point of the binding agent for a time sufficient to melt the binding agent.
- solvent refers to any organic solvent, for example, acetone, methylene chloride, toluene, benzene, ethanol, hexanes, and the like.
- substantially absence of solvent refers to 0% to less than 5%, by weight of the binder, of solvent. Preferred embodiments will include less than 5%, by weight of the binder, of solvent. Even more preferred embodiments will include less than 2%, by weight of the binder, of solvent. Yet more preferred embodiments will include less than 1%, by weight of the binder, of solvent.
- the binder comprises no added solvent. The amount of solvent present can be determined using any conventional methods known in the art.
- the coating material also referred to as the "binder”
- the binding material can be any solid polymer or wax with a defined melting point.
- binding agents falling under this description include but not limited to: stearamides, behenic acid, oleamides, polyethylenes, paraffin wax, ethelyne bissstearamides and cotton seed waxes.
- the binding agent melts when heated to a temperature of between about 50 °C and about 150 °C. In other embodiments of the invention, the binding agent melts when heated to a temperature of between about 50 °C and about 110 °C.
- the binder is polyethylene.
- binding agents for use in the invention include, for example, polyglycols such as polyethylene glycol or polypropylene glycol; glycerine; polyvinyl alcohol;
- binding agents that are useful are the relatively high molecular weight polyalkylene oxide-based compositions described in U.S. 5,298,055.
- Useful binding agents also include the dibasic organic acid, such as azelaic acid, and one or more polar components such as polyethers (liquid or solid) and acrylic resins as disclosed in U.S. 5,290,336, which is incorporated herein by reference in its entirety.
- 5,290,336 can also act advantageously as a combination of binder and lubricant.
- Additional useful binding agents include the cellulose ester resins, hydroxy alkylcellulose resins, and thermoplastic phenolic resins described in U.S. 5,368,630.
- the binding agent can further be solid polymers or waxes, such as polyesters, polyethylenes, epoxies, urethanes, paraffins, ethylene bisstearamides, and cotton seed waxes, and also polyolefins with weight average molecular weights below 3,000.
- solid polymers or waxes such as polyesters, polyethylenes, epoxies, urethanes, paraffins, ethylene bisstearamides, and cotton seed waxes, and also polyolefins with weight average molecular weights below 3,000.
- the weight of the binding agent is about 10% by weight, based on the weight of the bonded metallurgical powder composition.
- the bonded metallurgical powder compositions of the invention will comprise about 0.1% to about 5.0%, by weight of the bonded metallurgical powder composition, of binding agent.
- the bonded metallurgical powder compositions of the invention will comprise about 0.1% to about 3.0%, by weight of the bonded metallurgical powder composition, of binding agent.
- the bonded metallurgical powder compositions of the invention will comprise about 0.1% to about 2.0%, by weight of the bonded metallurgical powder composition, of binding agent.
- the bonded metallurgical powder compositions of the invention will comprise about 0.1% to about 1.0%, by weight of the bonded metallurgical powder composition, of binding agent.
- the melted binding agent in the substantial absence of solvent, is applied to a metallurgical powder mixture.
- metallurgical powder mixture refers to metallurgical powders comprising an metal-based powder.
- the metallurgical powder compositions of the invention preferably include at least 80 wt.% of an metal-based metallurgical powder.
- the metallurgical powder compositions of the invention preferably include at least 90 wt.% of an metal-based metallurgical powder.
- Preferred metal-based metallurgical powders of the invention are iron-based powders.
- Substantially pure iron powders are powders of iron containing not more than about 1.0% by weight, preferably no more than about 0.5% by weight, of normal impurities.
- ANCORSTEEL 1000 series of pure iron powders e.g. 1000, 1000B, and lOOOC, available from Hoeganaes Corporation, Riverton, New Jersey.
- ANCORSTEEL 1000 iron powder has a typical screen profile of about 22% by weight of the particles below a No. 325 sieve (U.S. series) and about 10% by weight of the particles larger than a No. 100 sieve with the remainder between these two sizes (trace amounts larger than No. 60 sieve).
- the ANCORSTEEL 1000 powder has an apparent density of from about 2.85-3.00 g/cm 3 , typically 2.94 g/cm 3 .
- Other substantially pure iron powders that can be used in the invention are typical sponge iron powders, such as Hoeganaes' ANCOR MH-100 powder.
- Metallurgical powder mixtures of the invention can be prealloyed iron-based powders are stainless steel powders. These stainless steel powders that are commercially available in various grades in the Hoeganaes ANCOR® series, such as the ANCOR® 303L, 304L, 316L, 410L, 430L, 434L, and 409Cb powders. Also, iron-based powders include tool steels made by powder metallurgy methods.
- Metallurgical powder mixtures of the invention can also be substantially pure iron powders prealloyed with alloying elements, such as for example molybdenum (Mo).
- Iron powders prealloyed with molybdenum are produced by atomizing a melt of substantially pure iron containing from about 0.5 to about 2.5 weight percent Mo.
- An example of such a powder is Hoeganaes' ANCORSTEEL 85HP steel powder, which contains about 0.85 weight percent Mo, less than about 0.4 weight percent, in total, of such other materials as manganese, chromium, silicon, copper, nickel, molybdenum or aluminum, and less than about 0.02 weight percent carbon.
- molybdenum containing iron based powders are Hoeganaes' ANCORSTEEL 737 powder (containing about 1.4 wt.% Ni - about 1.25 wt.% Mo - about 0.4 wt.% Mn; balance Fe), ANCORSTEEL 2000 powder (containing about 0.46 wt.% Ni - about 0.61 wt.% Mo - about 0.25 wt.% Mn; balance Fe), ANCORSTEEL 4300 powder (about 1.0 wt.% Cr - about 1.0 wt.% Ni - about 0.8 wt.% Mo - about 0.6 wt.% Si - about 0.1 wt.% Mn; balance Fe), and ANCORSTEEL 4600V powder (about 1.83 wt.% Ni - about 0.56 wt.% Mo - about 0.15 wt.% Mn; balance Fe).
- Other exemplary iron-based powders are disclosed in U.S. 7, 153,339, which is incorporated here
- These steel powder compositions are an admixture of two different pre-alloyed iron-based powders, one being a pre- alloy of iron with 0.5-2.5 weight percent molybdenum, the other being a pre-alloy of iron with carbon and with at least about 25 weight percent of a transition element component, wherein this component comprises at least one element selected from the group consisting of chromium, manganese, vanadium, and columbium.
- the admixture is in proportions that provide at least about 0.05 weight percent of the transition element component to the steel powder composition.
- Such a powder is commercially available as Hoeganaes' ANCORSTEEL 41 AB steel powder, which contains about 0.85 weight percent molybdenum, about 1 weight percent nickel, about 0.9 weight percent manganese, about 0.75 weight percent chromium, and about 0.5 weight percent carbon.
- Metallurgical powder mixtures of the invention can also be diffusion-bonded iron-based powders which are particles of substantially pure iron that have a layer or coating of one or more other alloying elements or metals, such as steel-producing elements, diffused into their outer surfaces.
- a typical process for making such powders is to atomize a melt of iron and then combine this atomized an annealed powder with the alloying powders and re-anneal this powder mixture in a furnace.
- Such commercially available powders include DISTALOY 4600A diffusion bonded powder from Hoeganaes Corporation, which contains about 1.8% nickel, about 0.55% molybdenum, and about 1.6% copper, and DISTALOY 4800A diffusion bonded powder from Hoeganaes Corporation, which contains about 4.05% nickel, about 0.55% molybdenum, and about 1.6% copper.
- the particles of iron-based powders used herein have a distribution of particle sizes.
- these powders are such that at least about 90% by weight of the powder sample can pass through a No. 45 sieve (U.S. series), and more preferably at least about 90% by weight of the powder sample can pass through a No. 60 sieve.
- These powders typically have at least about 50% by weight of the powder passing through a No. 70 sieve and retained above or larger than a No. 400 sieve, more preferably at least about 50% by weight of the powder passing through a No. 70 sieve and retained above or larger than a No. 325 sieve.
- these powders typically have at least about 5 weight percent, more commonly at least about 10 weight percent, and generally at least about 15 weight percent of the particles passing through a No. 325 sieve. Reference is made to MP IF Standard 05 for sieve analysis.
- metallurgical powder mixtures can have a weight average particle size as small as one micron or below, or up to about 850-1,000 microns, but generally the particles will have a weight average particle size in the range of about 10-500 microns.
- Preferred are iron or pre-alloyed iron particles having a maximum weight average particle size up to about 350 microns; more preferably the particles will have a weight average particle size in the range of about 25-150.
- metallurgical powder compositions have a typical particle size of less than 150 microns (-100 mesh), including, for example, powders having 38 % to 48 % of particles with a particle size of less than 45 microns (-325 mesh).
- the described iron-based powders are preferably water-atomized powders. These iron-based powders have apparent densities of at least 2.75, preferably between 2.75 and 4.6, more preferably between 2.8 and 4.0, and in some cases more preferably between 2.8 and 3.5 g/cm 3 .
- Corrosion resistant metallurgical powder mixtures incorporate one or more alloying additives that enhance the mechanical or other properties of final compacted parts.
- Alloying additives are combined with the iron powder by conventional powder metallurgy techniques known to those skilled in the art, such as for example, blending techniques, prealloying techniques, or diffusion bonding techniques.
- alloy additives are combined with an iron-based powder by prealloying techniques, i.e., preparing a melt of iron and the desired alloying elements, and then atomizing the melt, whereby the atomized droplets form the powder upon solidification.
- Alloying additives are those known in the powder metallurgical industry to enhance the corrosion resistance, strength, hardenability, or other desirable properties of compacted articles.
- Steel-producing elements are among the best known of these materials.
- alloying elements include, but are not limited to, chromium, silicon, graphite, copper, molybdenum, nickel, and the like, or combinations thereof. The amount of the alloying element or elements incorporated depends upon the properties desired in the final metal part. Pre-alloyed iron powders that incorporate such alloying elements are available from Hoeganaes Corp. as part of its ANCORSTEEL line of powders.
- the metallurgical powder mixtures comprise from 0.10% to about 10%, based on the weight of metallurgical powder mixture, of alloying powders.
- the metallurgical powder mixtures comprise from 0.20% to about 5%, based on the weight of metallurgical powder mixture, of alloying powders.
- the melted binding agent can be applied to the metallurgical powder mixture using any of the methods known in the art.
- One exemplary method is spray application.
- the metallurgical powder mixture can be heated prior to and/or during the application of the melted binding agent.
- the metallurgical powder mixture can be heated at a temperature of about 60 °C to about 85 °C, prior to and/or during the application of the melted binding agent.
- the melted binding agent and the metallurgical powder mixture are blended, in the substantial absence of solvent, for a time sufficient to form the bonded metallurgical powder compositions of the invention.
- the blending may take between 1 and 5 minutes, depending on the amount of binder. Any blending methods known in the art can be used.
- the blending methods allow for heating and blending to occur at the same time.
- the blending can occur in a mixer at low shear, that is, about 20 to about 30 rpm, or at high shear, that is, greater than 30 rpm.
- Blending devices that can be used with the methods of the invention include drum mixers, for example, and Elrich Mixer, paddle mixers, for example, an S. Howes mixer, a auta blender, and a Littleford Blender. Other methods of blending, such as a Wurster coater, can also be used.
- One advantage of the present invention is that, in contrast to the dry-bonding methods described in U.S. Patent Nos. 6,602,315 and 6,280,683, the binder does not need to be of any particular size because it will be melted prior to adding it to the metallurgical powder. As such, the binder can start as coarse chucks or prills that are several inches in size.
- the polymer is preferably melted in a vessel that is separate from the mixing blender that contains the metallurgical powder.
- the metal powder in the blender does not need to be heated to the softening or melting point of the polymer being sprayed. This results in a large energy savings, as compared to other dry-bonding methods known in the art.
- the methods of the invention have lower energy consumption as compared to solvent-bonding processes because solvent evaporation, recovery, and disposal is not necessary. The methods of the invention are, therefore, more energy efficient and more environmentally friendly.
- Any method of melting can be used, but direct heating of the vessel containing the polymeric material is acceptable.
- the metallurgical powder compositions of the invention may be formed into a variety of product shapes known to those skilled in the art, such as for example, the formation of billets, bars, rods, wire, strips, plates, or sheet using conventional practices.
- the bonded compositions are then compacted by conventional techniques known to those skilled in the art.
- the bonded metallurgical powder compositions are compacted at more than about 5 tons per square inch (tsi).
- the metallurgical powder compositions are compacted at from about 5 to about 200 tsi, and more preferably, from about 30 to about 60 tsi.
- the resulting green compact can be sintered.
- a sintering temperature of at least 2000 °F, preferably at least about 2200° F (1200 °C), more preferably at least about 2250° F (1230 °C), and even more preferably at least about 2300 °F (1260 °C), is used.
- the sintering operation can also be conducted at lower temperatures, such as at least 2100 °F.
- Sintered parts typically have a density of at least about 6.6 g/cm 3 , preferably at least about 6.68 g/cm 3 , more preferably at least about 7.0 g/cm 3 , more preferably from about 7.15 g/cm3 to about 7.38 g/cm 3 . Still more preferably, sintered parts have a density of at least about 7.4 g/cm 3 . Densities of 7.50 g/cm 3 are also achieved using the metallurgical powder compositions of the invention.
- Method B was a method according to the present invention.
- the test composition contained 0.80% graphite as the alloying powder, 98.45% ANCORSTEEL A1000 iron-based powder, and 0.75% polyethylene.
- Method 1 A the polyethylene was ground to a mean particle size of 20 microns and added to a blender comprising the test composition. The contents of the bender were heated to about 180 °F (82 °C).
- Method IB the polyethylene was heated to a temperature above its melting point and sprayed into a blender comprising the test composition. The contents of the bender were heated to about 180 °F (82 °C).
- Table 1 shows the dust resistance or bonding efficiency for graphite in the utilizing the two bonding techniques.
- the composition prepared according to Method IB had improved bonding efficiency.
- Fe 3 P ferrophosphorus
- the polyethylene was dissolved in acetone and combined with the other components according to the solvent-based bonding methods known in the art.
- One of the disadvantages of dissolving the binder in a solvent is that the solubility of the binder is limited.
- the limited amount of dissolved binder is not enough to provide proper lubrication for compaction, so additional lubricant must be added to the solvent bonded mix so compaction can take place.
- the additional lubricant is 0.50% ethylene bisstearamide ("EBS”) (average particle size - 20 microns).
- Method 2B the polyethylene was melted and spray-applied to the other components using a method of the invention. No EBS was needed for the test composition used in Method 2B, as the amount of binder was not solubility limited.
- Table 2 shows bonding efficiency for Fe 3 P in the utilizing the two bonding techniques.
- the composition prepared according to Method 2B had improved bonding efficiency.
- the additional lubricant is added in powder form, which can be prone to dusting. If the additional lubricant is added during the bonding process, some of the binder acts to bind the additional lubricant and is not available to bond the alloying powders, for example, Fe 3 P. This is in contrast with the methods of the present invention, since the polymer acts both as binder and lubricant.
- the test composition was mixed using conventional mixing techniques
- the polyethylene was melted and spray-applied to the other components using a method of the invention
- An advantage of the bonding methods of the invention is that the binder forms a thin coating around the outside of the iron powder, which then acts to "glue" any additive particles; in this example, graphite. Since the binder acts as a lubricant, the amount of lubricant added in powder form can be eliminated or reduced greatly. Since there is limited surface area on the iron-based powder for the particles to be bonded, the smaller the number of particles to be attached to the base powder, the better the bonding efficiency. This can be seen in Table 3, where the bonding efficiency (as measured by the total carbon) using Method 3B is 95% versus Method 3A, where the bonding efficiency is only 55%.
- a binder or lubricant's effect on apparent density and flow is important.
- Apparent density is a measure of how much powder can fill a fixed volume, with a higher value associated with better filling of a die to produce a part.
- the flow of a powder is the time necessary to fill the die cavity (a fixed volume). Since the production of PM parts involves repeatedly filling the die, the better the flow (lower time) the more parts that can be produced within a fixed time, therefore increasing the productivity of the part production process.
- the shape of a powder particle or bonded particle can have an influence on the flow and apparent density of a powder mixture. A more rounded shape improves both the apparent density, by improving the particle packing, and the flow, by reducing the particle friction.
- the shape of the powder can be considered as a combination of the base powder, the alloying powders, the lubricant, and the binder.
- the binder can be applied uniformly around the base powder, the bonded particle tends to be more spherical, as compared to bonded powders produced using "dry bonding" methods of the prior art.
- compositions of the mixes used in this Example are:
- Table 4 shows the flow and apparent density of the powders bonded according to the invention (Methods 4A and 4B) versus a standard premix and the solvent-bonded mix (Method 4C).
- Method 4A shows an improvement in the apparent density (higher) and flow (lower) than a premix of similar composition. Both Methods 4A and 4b performed better than either the premix or the standard solvent bonded mix (Method 4C).
- Binder should also be able to function as a lubricant.
- Lubricants are needed to assist the compaction and ejection of parts from a die and to reduce friction at the start and during ejection. If the binder can act as a lubricant, the forces necessary to compact the part can be reduced and higher densities can be achieved.
- Strip and slide which are measurements of the ejection characteristics of powder mixes, are shown in Table 5.
- the strip pressure is the pressure necessary to start the compacted part moving from the die during the ejection cycle.
- the lower the strip pressure the easier the part is to remove from the die and the less force required by the compacting press.
- the slide pressure is the force necessary to keep the part moving out of the die until it is free of the constraints of the die. In most cases the lower the slide pressure, the easier it is to remove from the die and the better the surface finish.
- Table 5 shows ejection forces (strip and slide) for three different compaction pressures (30,40, and 50 tsi).
- the material bonded according to the invention shows a lower strip and slide versus the conventional premix and the solvent-bonded mix.
- the green density of the material prepared according to the invention is comparable to the premix and is improved over the solvent-bonded mix.
- Table 5 shows the results of compaction properties of the various mixes.
- the mixes used in this experiment are A1000 +0.80% graphite + 0.75% organic materials.
- "Premix” refers to unbonded material.
- MB#1 and MB#2 are bonded material prepared according to the invention, that is, the binder was melted in the substantial absence of solvent and blended with the other materials.
- the binder used in MB#1 and MB#2 was behenic acid and ethylene bi- stearamide.
- MB#1 has 0.40% of the total lubricant from the binder.
- MB#2 has the binder being used also as the lubricant.
- AB 1 (Ancorbond 1) was bonded using solvent-bonding, and is used as a comparison.
- AB1 includes an organic binder comprising polyethylene, polyglycol, and ethylene bi-stearamide. In the tested mixtures, the combination of binder and ethylene bi- stearamide is 0.75%, by weight of the mixture
- An exemplary method of the invention includes heating a mixture of metal powder and alloying powders to a preselected temperature in a blending device.
- the binder is melted is a separate vessel and is they sprayed into the blending device, while the mixture is blended.
- the resulting bonded powder is the cooled to ambient temperature. Additional additives can be added at this time.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2016501126A JP2016517475A (en) | 2013-03-14 | 2014-03-11 | Method for solventless bonding of metallurgical compositions |
KR1020157028219A KR20150127214A (en) | 2013-03-14 | 2014-03-11 | Methods for solventless bonding of metallurgical compositions |
CN201480015542.4A CN105228774A (en) | 2013-03-14 | 2014-03-11 | The solvent-free adhesive method of metallurgical composites |
EP14713014.0A EP2969316A1 (en) | 2013-03-14 | 2014-03-11 | Methods for solventless bonding of metallurgical compositions |
BR112015023225A BR112015023225A2 (en) | 2013-03-14 | 2014-03-11 | Method for preparing a bound metallurgical powder composition, bound metallurgical powder composition and compacted metallurgical powder |
CA2906347A CA2906347A1 (en) | 2013-03-14 | 2014-03-11 | Methods for solventless bonding of metallurgical compositions |
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US201361781331P | 2013-03-14 | 2013-03-14 | |
US61/781,331 | 2013-03-14 |
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US (1) | US20140271329A1 (en) |
EP (1) | EP2969316A1 (en) |
JP (1) | JP2016517475A (en) |
KR (1) | KR20150127214A (en) |
CN (1) | CN105228774A (en) |
BR (1) | BR112015023225A2 (en) |
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CN106001540B (en) * | 2016-05-17 | 2018-11-27 | 厦门金鹭特种合金有限公司 | One kind being capable of flash baking hard alloy forming agent and its spice technique |
CN111609172A (en) * | 2020-04-28 | 2020-09-01 | 福建盛辉科技发展有限公司 | Inner valve core pipe and manufacturing method thereof |
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US7153339B2 (en) | 2004-04-06 | 2006-12-26 | Hoeganaes Corporation | Powder metallurgical compositions and methods for making the same |
JP2007211275A (en) * | 2006-02-08 | 2007-08-23 | Jfe Steel Kk | Method for producing mixture containing iron-based powder |
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SE468121B (en) * | 1991-04-18 | 1992-11-09 | Hoeganaes Ab | POWDER MIXING CONTAINING BASIC METAL POWDER AND DIAMID WAX BINDING AND MAKING THE MIXTURE |
SE0401778D0 (en) * | 2004-07-02 | 2004-07-02 | Hoeganaes Ab | Powder additive |
-
2014
- 2014-03-11 KR KR1020157028219A patent/KR20150127214A/en not_active Application Discontinuation
- 2014-03-11 CA CA2906347A patent/CA2906347A1/en not_active Abandoned
- 2014-03-11 EP EP14713014.0A patent/EP2969316A1/en not_active Withdrawn
- 2014-03-11 CN CN201480015542.4A patent/CN105228774A/en active Pending
- 2014-03-11 US US14/203,930 patent/US20140271329A1/en not_active Abandoned
- 2014-03-11 BR BR112015023225A patent/BR112015023225A2/en not_active IP Right Cessation
- 2014-03-11 WO PCT/US2014/023002 patent/WO2014159318A1/en active Application Filing
- 2014-03-11 JP JP2016501126A patent/JP2016517475A/en active Pending
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US3117027A (en) | 1960-01-08 | 1964-01-07 | Wisconsin Alumni Res Found | Apparatus for coating particles in a fluidized bed |
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US6280683B1 (en) | 1997-10-21 | 2001-08-28 | Hoeganaes Corporation | Metallurgical compositions containing binding agent/lubricant and process for preparing same |
US6602315B2 (en) | 1997-10-21 | 2003-08-05 | Hoeganaes Corporation | Metallurgical compositions containing binding agent/lubricant and process for preparing same |
US20050139039A1 (en) * | 2003-12-22 | 2005-06-30 | Hoganas Ab | Metal powder composition and preparation thereof |
US7153339B2 (en) | 2004-04-06 | 2006-12-26 | Hoeganaes Corporation | Powder metallurgical compositions and methods for making the same |
US20060000310A1 (en) * | 2004-07-02 | 2006-01-05 | Hoganas Ab | Powder additive |
JP2007211275A (en) * | 2006-02-08 | 2007-08-23 | Jfe Steel Kk | Method for producing mixture containing iron-based powder |
Also Published As
Publication number | Publication date |
---|---|
KR20150127214A (en) | 2015-11-16 |
CN105228774A (en) | 2016-01-06 |
JP2016517475A (en) | 2016-06-16 |
EP2969316A1 (en) | 2016-01-20 |
BR112015023225A2 (en) | 2017-07-18 |
US20140271329A1 (en) | 2014-09-18 |
CA2906347A1 (en) | 2014-10-02 |
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