US3653884A - Process for the continuous production of a strip from powdered metal - Google Patents
Process for the continuous production of a strip from powdered metal Download PDFInfo
- Publication number
- US3653884A US3653884A US807101A US3653884DA US3653884A US 3653884 A US3653884 A US 3653884A US 807101 A US807101 A US 807101A US 3653884D A US3653884D A US 3653884DA US 3653884 A US3653884 A US 3653884A
- Authority
- US
- United States
- Prior art keywords
- strip
- metal
- binder
- slurry
- powdered metal
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000012255 powdered metal Substances 0.000 title abstract description 14
- 238000010924 continuous production Methods 0.000 title description 3
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 26
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 17
- 229920002678 cellulose Polymers 0.000 claims description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 229920003086 cellulose ether Polymers 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 23
- 239000002184 metal Substances 0.000 abstract description 19
- 229910052751 metal Inorganic materials 0.000 abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 15
- 238000005096 rolling process Methods 0.000 abstract description 11
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 229920001515 polyalkylene glycol Polymers 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 238000005245 sintering Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229920000609 methyl cellulose Polymers 0.000 description 7
- 239000001923 methylcellulose Substances 0.000 description 7
- 235000010981 methylcellulose Nutrition 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000000151 deposition Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- -1 glycerol Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- 150000008163 sugars Chemical class 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 229960004903 invert sugar Drugs 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Classifications
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- 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
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Definitions
- This invention relates to a process for the production of metal strip from powdered metal which is particularly, but not exclusively, applicable to the production of steel strip.
- This process basically comprises the steps of forming a slurry comprising a suspension of a metal powder in a binder composition, depositing on a support surface, such as a metal band or drum, a coating of the slurry to form, after any necessary drying, a self-supporting metal powder/binder strip, removing the strip from the support surface and rolling it to effect compaction and thereafter sintering the compacted strip in a reducing atmosphere at a temperature below the melting point of the metal.
- a support surface such as a metal band or drum
- Water-based binder compositions are preferred for a variety of reasons including economy and absence of fire hazard and film-forming cellulose derivatives have been found to generally meet the requirements of suitable film-forming materials for formulation of the binder compositions.
- the metal powder/binder strip obtained by deposition and drying of the slurry should possess sufficient strength and flexibility to withstand mechanical handling before the first compaction step in which the metal particles are cold-welded and inter-locked.
- the preferred binders are film-forming, watersoluble cellulose ethers, particularly those containing methyl groups, e.g. methyl cellulose, since metal powder/binder strip of good strength and flexibility can be formed from binder compositions based on these cellulose ethers.
- a process for the production of strip from powdered metal which comprises depositing on a support surface a coating of a slurry comprising a suspension of powdered metal in a binder composition containing a hygroscopic substance, drying the coating on the support surface, rolling the dried coating to effect compaction and sintering the compacted coating at a temperature below the melting point of the metal.
- the process is generally carried out by application of the slurry of powdered metal and binder to a moving belt or drum, for example by roller coating.
- the metal powder/binder strip is removed from the belt or drum, compacted by rolling and then subjected to a first sintering step.
- the hygroscopic substance is conveniently added to the binder composition prior to dispersing the powdered metal therein.
- the binder composition may be added to the water before or after the addition of the cellulose derivative.
- the powdered metal is then stirred into the resultant binder composition.
- the hygroscopic substance should, of course. be compatible with the binder.
- the hygroscopic substance is a water-soluble polyhydroxy compound such as glycerol, low molecular weight polyalkylene glycols, e.g. trimethylene glycol, polyhydric alcohols, e.g. sorbitol, mannitol, and sugars, e.g. invert sugar, Inorganic hygroscopic material may also be used, e.g. calcium chloride.
- the hygroscopic substance is preferably present in an amount of up to 1 percent by weight of the suspension. It is found that if substantially larger proportions of hygroscopic substance are employed, too much water tends to be retained in the cellulose derivative during the slurry drying and this causes difficulties in the subsequent processing steps.
- a self-supporting strip is produced in the manner described in our above co-pending application and the subsequent steps of the process are carried out in the manner described in that application.
- An aqueous methyl cellulose solution was formed by dissolving 0.6 parts by weight of methyl cellulose in 30 parts by weight of water.
- 0.1 parts by weight of the sodium salt of an aliphatic dicarboxylic acid and 0.1 parts by weight of a polyoxylated polyalkylene glycol sold under the Trade Mark Supronic were incorporated in the methyl cellulose solution, the former additive being a corrosion inhibitor and the latter a surface-active agent.
- a series of binder compositions were prepared by dissolving various quantities of glycerol in samples of the methyl cellulose solution.
- test strips were then made by the following steps:
- Hoganas iron powder is made by the direct reduction of high grade magnetic ore.
- the powder particles are irregular in shape and compact well to give good green" strength.
- the powder contains certain impurities especially silica, discrete particles of oxides and surface oxides and these impurities do tend to have a deleterious effect on the mechanical properties of strip made from Hoganas powder.
- Makin iron powder is made from molten high grade pig iron or scrap by water atomisation, followed by crushing and heat treatment. This gives an iron powder which is feathery and ragged in shape. The powder tends to be a little more pure than Hoganas powder.
- Sintrex powder is produced by the electrolytic deposition of iron. The powder is dendritic in shape and of high purity which gives excellent green strength and sintered properties. It is, however, rather more expensive than Hoganas or Makin powders.
- the effect of the presence of the glycerol is to produce a significant improvement in the ultimate tensile strength of the finished strip and more important this is accompanied by a substantial improvement in the percentage elongation of the final strip, this demonstrating greatly improved ductility.
- Glycerol and the other organic hygroscopic substances mentioned above are preferably used in the practice of the present invention because their use results in the development of improved mechanical properties in the final strip as demonstrated b the above tests.
- thermogelling property An important feature of solutions of certain cellulose ethers (e.g. methyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose) is their thermogelling property.
- a slurry containing a solution of methyl cellulose is heated to above approximately 50 C., thermogelling occurs which prevents settling out of the metal powders.
- thermogelling occurs which prevents settling out of the metal powders.
- slurry drying above the gel temperature results in more flexible dried metal powder/binder strip because of the homogenous distribution of the metal powder.
- a process for the continuous production of a strip from powdered metal which. comprises:
- a coating of a slurry comprising a suspension of powdered metal in a binder composition containing a film-forming cellulose derivative as the binder, and a hygroscopic substance compatible with said binder, said hygroscopic substance selected from the group consisting of low molecular weight polyalkylene glycols, polyhydric alcohols, sugars, and calcium chloride,
- non-ionic surface-active agent is a polyoxyalkylene glycol.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1248468 | 1968-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3653884A true US3653884A (en) | 1972-04-04 |
Family
ID=10005460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US807101A Expired - Lifetime US3653884A (en) | 1968-03-14 | 1969-03-13 | Process for the continuous production of a strip from powdered metal |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3653884A (enrdf_load_stackoverflow) |
| AT (1) | AT290864B (enrdf_load_stackoverflow) |
| BE (1) | BE729811A (enrdf_load_stackoverflow) |
| ES (1) | ES364747A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2003864A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1257032A (enrdf_load_stackoverflow) |
| LU (1) | LU58200A1 (enrdf_load_stackoverflow) |
| NL (1) | NL6903838A (enrdf_load_stackoverflow) |
| SE (1) | SE335904B (enrdf_load_stackoverflow) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592780A (en) * | 1984-04-07 | 1986-06-03 | Mixalloy Limited | Production of flat products in strip sheet or like form |
| US4596691A (en) * | 1984-09-20 | 1986-06-24 | Gte Products Corporation | Process for forming a laminated strip containing a brazing alloy |
| US4602954A (en) * | 1984-04-07 | 1986-07-29 | Mixalloy Limited | Metal strip |
| US4617054A (en) * | 1984-08-10 | 1986-10-14 | Mixalloy Limited | Production of metal strip |
| US4772322A (en) * | 1986-05-20 | 1988-09-20 | John Bellis | Production of flat products from particulate material |
| US5011654A (en) * | 1989-07-29 | 1991-04-30 | Roy Mathers | Production of flat products |
| US20030231973A1 (en) * | 2002-06-12 | 2003-12-18 | The University Of Chicago | Compositionally graded metallic plates for planar solid oxide fuel cells |
| US20050044988A1 (en) * | 2003-09-03 | 2005-03-03 | Apex Advanced Technologies, Llc | Composition for powder metallurgy |
| EP3075467A4 (en) * | 2013-11-28 | 2017-08-02 | Mitsubishi Materials Corporation | Clay-like composition for noble metal sintered compact |
| EP3075468A4 (en) * | 2013-11-28 | 2017-08-02 | Mitsubishi Materials Corporation | Clay-like molded body for forming noble metal sintered compact |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8621712D0 (en) * | 1986-09-09 | 1986-10-15 | Mixalloy Ltd | Flat products |
| WO1999015317A1 (en) * | 1997-09-22 | 1999-04-01 | Valu Engineering, Inc. | Splice sleeve for guide rails |
| AU9501498A (en) | 1997-09-22 | 1999-04-12 | Valu Engineering, Inc. | Splice sleeve for guide rails |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115698A (en) * | 1960-02-29 | 1963-12-31 | Gen Electric | Casting metal powders |
| US3335000A (en) * | 1965-10-04 | 1967-08-08 | Texas Instruments Inc | Manufacture of metal foil |
-
1968
- 1968-03-14 GB GB1248468A patent/GB1257032A/en not_active Expired
-
1969
- 1969-03-12 FR FR6906903A patent/FR2003864A1/fr active Pending
- 1969-03-12 NL NL6903838A patent/NL6903838A/xx not_active Application Discontinuation
- 1969-03-13 SE SE03473/69A patent/SE335904B/xx unknown
- 1969-03-13 LU LU58200D patent/LU58200A1/xx unknown
- 1969-03-13 US US807101A patent/US3653884A/en not_active Expired - Lifetime
- 1969-03-13 BE BE729811D patent/BE729811A/xx not_active IP Right Cessation
- 1969-03-13 ES ES364747A patent/ES364747A1/es not_active Expired
- 1969-03-14 AT AT250069A patent/AT290864B/de not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115698A (en) * | 1960-02-29 | 1963-12-31 | Gen Electric | Casting metal powders |
| US3335000A (en) * | 1965-10-04 | 1967-08-08 | Texas Instruments Inc | Manufacture of metal foil |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592780A (en) * | 1984-04-07 | 1986-06-03 | Mixalloy Limited | Production of flat products in strip sheet or like form |
| US4602954A (en) * | 1984-04-07 | 1986-07-29 | Mixalloy Limited | Metal strip |
| US4617054A (en) * | 1984-08-10 | 1986-10-14 | Mixalloy Limited | Production of metal strip |
| US4596691A (en) * | 1984-09-20 | 1986-06-24 | Gte Products Corporation | Process for forming a laminated strip containing a brazing alloy |
| US4772322A (en) * | 1986-05-20 | 1988-09-20 | John Bellis | Production of flat products from particulate material |
| US5011654A (en) * | 1989-07-29 | 1991-04-30 | Roy Mathers | Production of flat products |
| US20030231973A1 (en) * | 2002-06-12 | 2003-12-18 | The University Of Chicago | Compositionally graded metallic plates for planar solid oxide fuel cells |
| US6843960B2 (en) * | 2002-06-12 | 2005-01-18 | The University Of Chicago | Compositionally graded metallic plates for planar solid oxide fuel cells |
| US20050044988A1 (en) * | 2003-09-03 | 2005-03-03 | Apex Advanced Technologies, Llc | Composition for powder metallurgy |
| US7192464B2 (en) | 2003-09-03 | 2007-03-20 | Apex Advanced Technologies, Llc | Composition for powder metallurgy |
| EP3075467A4 (en) * | 2013-11-28 | 2017-08-02 | Mitsubishi Materials Corporation | Clay-like composition for noble metal sintered compact |
| EP3075468A4 (en) * | 2013-11-28 | 2017-08-02 | Mitsubishi Materials Corporation | Clay-like molded body for forming noble metal sintered compact |
| US10239121B2 (en) | 2013-11-28 | 2019-03-26 | Mitsubishi Materials Corporation | Clay-like composition for sintered precious metal body |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2003864A1 (enrdf_load_stackoverflow) | 1969-11-14 |
| DE1912301B2 (de) | 1976-09-09 |
| NL6903838A (enrdf_load_stackoverflow) | 1969-09-16 |
| ES364747A1 (es) | 1970-12-16 |
| GB1257032A (enrdf_load_stackoverflow) | 1971-12-15 |
| SE335904B (enrdf_load_stackoverflow) | 1971-06-14 |
| AT290864B (de) | 1971-06-25 |
| DE1912301A1 (de) | 1969-10-09 |
| BE729811A (enrdf_load_stackoverflow) | 1969-08-18 |
| LU58200A1 (enrdf_load_stackoverflow) | 1969-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: MIXALLOY LTD, ANTELOPE INDUSTRIAL ESTATE, , Free format text: ASSIGNS THE ENTIRE INTEREST, SUBJECT TO LICENSE AND CONDITIONS RECITED;ASSIGNOR:BRITISH STEEL CORPORATION;REEL/FRAME:004146/0326 Effective date: 19830207 Owner name: BRITISH STEEL CORPORATION, 33 GROSVENOR PLACE LOND Free format text: ASSIGNOR AGREED TO TRANSFER THE ENTIRE INTEREST UNDER SAID PATENTS SUBJECT TO CONDITIONS RECITED;ASSIGNOR:BRITISH IRON AND STEEL RESEARCH ASSOCIATION, THE;REEL/FRAME:004146/0331 Effective date: 19790330 Owner name: MIXALLOY LTD, ANTELOPE INDUSTRIAL ESTATE, RHYDYMWY Free format text: ASSIGNS THE ENTIRE INTEREST, SUBJECT TO LICENSE AND CONDITIONS RECITED;ASSIGNOR:BRITISH STEEL CORPORATION;REEL/FRAME:004146/0326 Effective date: 19830207 Owner name: BRITISH STEEL CORPORATION, 33 GROSVENOR PLACE, LON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BRITISH IRON AND STEEL RESEARCH ASSOCIATION, THE;REEL/FRAME:004146/0319 Effective date: 19811008 |