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WO/1991/010753 |
The invention proposes a metal-powder blend which can be produced simply and can be used to manufacture high-strength wear-resistant cylinder parts to tight dimensional tolerances. This metal-powder blend consists of a steel powder forme...
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WO/1991/010754 |
In a process for producing high-strength sintered parts, a water-atomized and reduction-annealed powdered steel mixed with 0.3 to 0.7 wt.% of graphite powder is compressed in a mould to form compacts, which are then sintered at a tempera...
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WO/1991/009979 |
The method provides for initiating a burning reaction in an exothermic mixture with the following composition in per cent by weight: a transition metal 32-86, carbon and/or boron 4-28, modifying addition 1-10, compacting the solid produc...
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WO/1991/009981 |
A sintered alloy bearing produced by compaction molding and sintering a composition comprising 20 to 80 wt % of iron, 15 to 77 wt % of copper, 1 to 26 wt % of zinc, 0.5 to 7 wt % or less of lead, 0.5 to 7 wt % of tin and the balance of u...
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WO/1991/006107 |
A two-phase permanent magnet which has not only excellent magnetic characteristics but also significantly high corrosion resistance. It is manufactured by use of two magnetically useful phases as the starting materials. One is an RE¿2?T...
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WO/1991/003579 |
An austenitic steel alloy has a composition of about 6 to 13 percent aluminum, 20 to 34 percent manganese, 0.2 to 1.4 percent carbon, 0.4 to 1.3 percent silicon, and the balance essentially iron. The relative quantities of the foregoing ...
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WO/1991/000602 |
Method for preparing permanent magnets from a massive alloy containing a mixture based on neodymium-iron-boron which, for a range of temperatures, has a range within which said alloy undergoes two phases, one solid and fragile and the ot...
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WO/1990/016075 |
This invention relates to a process for producing a rare earth-containing material which is resistant to oxidation and non-pyrophoric comprising treating the rare earth containing material with a passivating gas at a temperature below th...
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WO/1990/015165 |
The specification discloses a process for producing a ferroalloy in a smelting vessel. A material containing an alloying metal is injected into a molten bath contained in the vessel. A flux, a carbonaceous material and an oxygen-containi...
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WO/1990/006198 |
An iron-based powder prealloyed during atomisation contains dissolved Mo for producing, under normal compacting and sintering conditions in powder metallurgical production, precision-moulded components with good dimensional accuracy, har...
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WO/1990/005197 |
The method provides for charging the casting ladle with a mixture containing magnesium and ferrosilicium at a ratio of 1:10 to 1:20, adding to it steel cuttings and pouring into the ladle molten cast iron. The mixture contains the magnes...
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WO/1990/000630 |
This invention describes a series of Fe-Mn-Al-C based corrosion resistance alloys. It also describes how to obtain such alloys which have good corrosion resistance in many environments as compared to conventional stainless steel such as ...
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WO/1990/000207 |
The invention provides a process for producing sintered alloy steel with excellent corrosion resistance, which comprises step (1) of mixing powdery stainless steel with a binder and, after molding, removing the binder from the molding by...
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WO/1989/012112 |
An economically advantageous process for producing sintered magnetic Fe-Co, Fe-Co-V or Fe-Co-Cr material, which comprises preparing alloy powder of at least Fe and Co, kneading it with an organic binder, subjecting the kneaded mixture to...
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WO/1989/009841 |
The method disclosed herein involves the addition of small quantities of elements appearing for the most part in Groups IA, IIA and IIIB of the Periodic Table to the base alloy composition. These elements, as ions, enter into the protect...
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WO/1989/009842 |
A process for producing an iron-boron-silicon alloy through simple steps with economic advantages, which comprises adding a boron material and a carbonaceous reducing agent to a molten iron placed in a vessel, blowing oxygen into said mo...
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WO/1989/008609 |
Manganese or silicon carbide is formed in a solid state reaction by mixing finely divided manganese or silicon oxide particles with finely divided carbonaceous material (e.g. coke) particles. The materials may be formed into agglomerates...
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WO/1989/005031 |
A sintered Fe-Nd-B magnet with improved coercitive field strength and reduced temperature dependence of the latter is composed of 25 to 50 wt. % Nd, 0.5 to 2 wt. % B, 0 to 5 wt. % Al, 0.5 to 3 wt. % O, and the remainder of Fe and ordinar...
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WO/1989/002802 |
High-strength and high-toughness sintered alloy steel and composite alloy steel powder for use in production of the steel are disclosed. The steel contains as final product alloy components Ni, Mo and/or W and, if necessary, C with the c...
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WO/1989/002477 |
This invention relates to a method of preventing, during the melt-reduction of Cr ore or iron ore, the scatter loss of the ore and coal at the time of charging. In the present invention, the ore and coal are charged down into a furnace f...
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WO/1989/001532 |
A process for directly obtaining high Cr content melt by melt reduction of Cr starting materials such as Cr ore pellets, etc. is disclosed, which comprises using a furnace equipped with a bottom-blowing nozzle, a side-blowing nozzle, and...
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WO/1988/008459 |
Mill scale, iron ore, or taconite is utilized in a powder metallurgy process to form steel articles having approximately the same density as that of conventional rolled steel. Particulate iron is mixed with manganese, carbon, additional ...
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WO/1988/007093 |
The invention relates to a cold work steel having a very high resistance to wear and good impact strength made powder-metallurgically through the consolidation of metal powder to a dense body. The powder has the following chemical compos...
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WO/1988/005829 |
A process for producing low-carbon ferrochromium, which comprises melting ores containing oxies of Cr and Fe a melting furnace, taking up the molten metal in a ladle, adding thereto a reducing agent such as SiCr, and introducing thereint...
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WO/1988/004697 |
An activator mixture for improving utilizable strength steels which consists essentially Ca and/or Na 16 to 30 %; Si 13 to 30 %; V and/or Mo 2 to 28 %, Nb and/or Ta 2 to 14 %, Al and/or Ba 1 to 15 %; B and/or Be 0,1 to 3,0 %, C 1 to 5 %;...
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WO/1988/003961 |
Sintered ferrous alloys of at least 95 % theoretical density are obtained by sintering a powder mixture containing atomised copper-free ferrous alloy, copper phosphide and, optionally, copper, copper alloy and/or graphite to provide a si...
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WO/1988/002370 |
Compounds of formula (I), wherein R1 is optionally substituted phenyl, pyridyl, thienyl, furyl, pyrrolyl, thiazolyl, or ribofuranosyl; X is oxygen, NR, or sulfur; R is hydrogen, lower alkyl, lower alkenyl, or lower alkynyl; and ring A is...
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WO/1988/000621 |
Abrasion-resistant sintered alloy which comprises a Cr-C-Fe base alloy containing dispersed therein 0.5 to 3 wt % of CaF2 and 5 to 20 wt % of hard alloy powder of 44 to 150 mum in size and 800 to 2,000 in average Vickers hardness. This a...
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WO/1988/000505 |
An alloy steel powder for use in powder metallurgy is produced by alloying steel powder with 0.2 to 2.0 wt % of W and 0.8 to 3.0 wt % of Ni and, further, 0.1 to 1.0 wt % of Mo and 0.2 to 2.0 wt % of Cu. This powder shows well improved st...
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WO/1988/000102 |
A heat-insulating component consists of a porous body obtained by moulding and sintering an iron-base powder having an admixture of 2-10 % by weight of silicon, preferably 4-8 % by weight. A method of making the heat-insulating component...
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WO/1987/006272 |
A material intended for alloying a metal with vanadium comprises a metallic component which is covered by an envelope consisting of an alloying component of the following composition, in per cent by weight: 10-24 of silicon oxide, 14-25 ...
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WO/1987/001396 |
Case-hardening steel of low O-, S- and P-contents which contains, by weight, one or more members selected from among 0.10 to 0.30% C, 0.50% or less Si, 1.50% or less Mn, 0.012% or less P, 0.009% or less S, 0.02 to 0.04% Al, 0.0010% or le...
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WO/1987/000463 |
A copper infiltrated ferrous powder metal part infiltrated with copper or a copper alloy characterized as having after infiltration a residual uninfiltrated porosity of less than about 7 volume percent and a maximum pore size of the resi...
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WO/1987/000207 |
Sintered alloys based on high-speed steels may be used to fabricate attrition parts in the construction of machines and vehicles. The sintered alloys comprise a mixture of a powder of high-speed steel and a powder of pure or slightly-all...
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WO/1986/004841 |
Method in producing a molding of an iron alloy, wherein the molding is produced by hot isostat pressing of a prealloyed powder comprising 0.5 to 2.8 % coal by weight, 24 to 35 % chromium by weight, from effective amount to 2 % silicon by...
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WO/1986/004360 |
A tool steel, comprising high speed steel and cold working steel, produced from metal powder by compaction at a high pressure and a high temperature to full density. The steel is characterized in that a) at least 40% of the carbides of a...
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WO/1985/004193 |
Process for producing alloy steels wherein a vanadium additive consisting essentially of chemically prepared, substantially pure V2O3 is added to molten steel as a vanadium additive. The production of the alloy steel involves specificall...
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WO/1985/004192 |
Process for producing tool steel wherein a vanadium additive consisting essentially of chemically prepared, substantially pure V2O3 is added to a molten steel having a carbon content above about 0.35 wt. % and containing silicon in an am...
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WO/1985/003465 |
A powdery material is prepared by atomization from a molten alloy having the following composition in weight percent: chromium: 10-30; aluminium: 1-25; carbon: less than 0.5; nickel: less than 10; iron: the balance, with a cooling speed ...
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WO/1985/001520 |
Iron-base abrasion-resistant sintered alloy member containing at least 1.5 to 3.5 wt % C, 0.5 to 3.5 wt % P, and one or both of Mo and W in an amount of 0.5 to 3.0 wt % in terms of Mo (the conversion rate of W being 0.5) in addition to i...
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WO/1985/001230 |
Iron based powder mixtures, which except iron or steel powder and one or more alloying elements in powder form also contain an addition of up to 0.5 % of talloil to prevent segregation/dusting.
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WO/1985/000835 |
Iron-base abrasion resistant sintered alloy containing, in addition to Fe, at least 1.5 to 2.5 wt % C, 0.5 to 3.0 wt % Si, and 0.2 to 0.6 % P, prepared by sintering in a liquid phase. The alloy may optionally contain either or both of 1....
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WO/1985/000836 |
Abrasion-resistant alloy sintered in a liquid phase, which contains, by weight, 1.5 to 4.0 % C, 0.5 to 1.2 % Si, 1.0 % or less Mn, 2.0 to less than 8.0 % Cr, 0.5 to 2.5 % Mo, 0.2 to 0.8 % P, and the balance of Fe.
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WO/1984/004712 |
Tin-containing iron powder comprising powder particles mainly composed of iron having formed on the surface thereof a tin-rich portion wherein at least part of the tin is in the form of a compound with iron and the content of total tin i...
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WO/1984/004760 |
A tough, wear- and abrasion-resistant, high chromium, hypereutectic white iron alloy, with a composition by wt.% of >4.0 C, 25-45 Cr, 0-15 Mn, 0-10 Mo, 0-10 Ni, 0-2 B and 0-5 of at least one of Ti, W, Ta, V and Nb, subject to the proviso...
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WO/1984/000385 |
A white cast iron having toughness, high tensile strength and abrasion resistance containing 0.1 % to 4.0 % boron in an iron-carbon alloy with the carbides in the form of globules and of an average size less than 4 microns. This white ca...
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WO/1983/003848 |
A magnesium ferrosilicon alloy for in-mold nodulization of ductile iron consisting of 5-15% by weight of magnesium, 60-80% silicon, 0.1-1.5% calcium, 0.1-3.0% aluminum, 0-2.5% rare earth, and balance iron.
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WO/1983/001461 |
Ferrochromium is produced or treated with a limited amount of carbonaceous reductant by feeding the materials to the reaction zone of a furnace and heated therein in the substantial absence of oxygen by a transferred arc thermal plasma. ...
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WO/1983/001462 |
Ferrochromium metal is refined by heating with a metal oxide, e.g. chromite in a transferred arc thermal plasma with substantial exclusion of carbon.
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WO/1982/003410 |
In order to prepare vermicular graphite cast iron in a converter, it is proposed to operate a disulphurization of the primary melting by treating with pure magnesium and alloying to the magnesium, the proportion of Mg to S being in the r...
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