Abstract: The present invention is directed to a corrosion and erosion resistant High Chromium, Nitrogen bearing alloy, comprising the following composition in wt. %: 28-48 chromium, 0.01-0.7 nitrogen, 0.5-30 manganese, 0.01-5 boron, 0.3-2.5 carbon, up to 0.01-25 cobalt plus nickel, up to 0.01-5 silicon, up to 0.01-8 copper, up to 0.01-6 molybdenum, up to 2% of each one selected from group consisting of zirconium, vanadium, cerium, titanium, tungsten, niobium, aluminum, calcium, and rare earth elements with the balance being essentially iron and other trace elements or inevitable impurities. The alloy has a microstructure comprising hypoeutectic, eutectic, chromium carbides, boride and nitrides in the austenitic matrix, saturated with nitrogen with virtually no secondary carbides and nitrides.

Abstract: A steel article consists of an alloy which consists in weight- %: 1.7-2.5; 0.1-2.0 Si; 0.1-2.0 Mn; max 0.2 N; max 0.2 S; 12 16 Cr; 2.1-3.5 (Mo+W/2); 5-8 V; max 0.1 Nb, balance essentially only iron and unavoidable impurities. The steel has a micro-structure obtainable by a manufacturing of the steel which comprises spray forming of an ingot, the micro-structure of which contains 14-25 vol-% carbides of mainly MC-type, where M substantially consists of vanadium, of which carbides at least 80 vol-% have a substantially rounded shape and a size in the longest extension of the carbides amounting to 1-10 &mgr;m, and M7C3-carbides, where M substantially consists of chromium, which carbides typically have a more elongated shape than the MC-carbides, of which MC-carbides at least 80 vol-% have a maximal extension amounting to 3-50 &mgr;m.

Abstract: In a method of producing an iron-based alloy containing chromium carbide, pieces of cemented carbide are added to an iron-based melt containing carbon, e.g. cast iron. Chromium, which regulates the solution of WC into the melt, is also added. The molten alloy is then cast. An alloy comprising chromium-tungsten-carbide in a ferrous matrix is produced. Uses of the alloy are claimed.

Abstract: This invention relates to a nitrogen-alloyed steel with a high wear resistance, which is manufactured via spray compacting and has the following composition (in mass-%): C: 0.8-2.5%, N: 0.03-0.75%, Si: 0.15-1.8%, Mn: ≦1.0%, P: ≦0.03%, S: ≦0.05%, Cr: 4.0-11.5%, Mo: 0.5-6.0%, V: ≦4.0%, Nb: ≦4.0%, W: ≦3.5%, O2: ≦0.005%, other ally constituents as needed, residual iron and usual contaminants as the residue. The chemical composition has been optimized to have the carbide-carbonitride-forming elements satisfy a wear factor Sv, and to maintain the silicon-nitrogen ratio VSiN in order to minimize the residual austenite contents. In addition, the invention relates to a procedure for manufacturing this type of steel and a composite manufactured using steel according to the invention. The steel material according to the invention has an improved wear resistance and dimensional stability.

Abstract: The invention includes a method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of B, C, Si and P. The mixture is formed into an alloy and cooled to form a metallic material having a hardness greater than about 9.2 GPa. The invention includes a method of forming a wire by combining a metal strip and a powder. The strip and powder are rolled to form a wire containing at least 55% iron and from 2-7 additional elements including at least one of C, Si and B. The invention also includes a method of forming a hardened surface on a substrate by processing a solid mass to form a powder, applying the powder to a surface to form a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.

Abstract: The present invention relates to stainless spheroidal carbide cast iron material is such: comprises iron (Fe) as its main component, C 0.6˜4.0% and V 4˜15% as its necessary components, P 0.01˜0.15%, S 0.01˜0.05% Al 0.05˜1.0%, and Mg 0.01˜0.2% as gas (hydrogen) bubble assistants, and Si 0.2˜4.5%, Cr 13˜30%, Mn 0.2˜3.0%, and Ni and/or Co 4˜15% as anticorrosion matrix formers, and according to the case of necessary, alloy elements 0.1˜1.

Abstract: The present invention relates to stainless spheroidal carbide cast iron is such: comprises Fe as its main component;, C 0.6˜4.0% and V 4˜15% as its necessary components, P 0.01˜0.15%, S 0.01˜0.05%, and Al 0.05˜1.0% as bubble assistants, and Ni 4˜15%, Si 0.2˜4.5%, Cr 13˜30%, and Mn 0.2˜1.5% as anticorrosion matrix formers in weight %; produced by the process that minute spheroidal space of gas (hydrogen) bubble is dispersed substantially equally into molten metal positively by high temperature melting at 1950˜2073 K which is the bubbling reaction temperature, and spheroidal vanadium carbide of a covalent bond is crystallized inside of the spheroidal space, which has special characteristics such as corrosion-resistance, heat-resistance, abrasion-resistance, toughness and processing ability.

Abstract: A steel material which is manufactured in a non-powder metallurgical way, comprising production of ingots or castings from a melt, consists of an alloy having the following chemical composition in weight-% Carbon: 2.0-4.3%, Silicon: 0.1-2.0%, Manganese: 0.1-2.0%, Chromium: 5.6-8.5%, Nickel: max. 1.0%, Molybdenum: 1.7-3%, wherein Mo completely or partly can be replaced by double the amount of W, Niobium: max. 2.0%, Vanadium: 6.5-15%, wherein V partly can be replaced by double amount of Nb up to max. 2% Nb, Nitrogen: max. 0.3%, wherein the contents of on the one hand carbon and nitrogen and on the other hand vanadium and any possibly existing niobium shall be balanced relative to each other, such that the contents of the said elements shall lie within the area of A, B″, E, F, B′, B, C, D, A in the co-ordinate system in FIG. 2, where V+2Nb, C+N co-ordinates for said points are A: (9,3.1), B″: (9,2.85), E: (15,4.3), F: (15,3.75), B′: (9,2.65), B: (9,2.5), C: (6.5,2.0), D: (6.5,2.

Abstract: A corrosion and wear-resistant chill cast part is formed from an iron composition comprising from 26 to 36 percent Cr; 0 to 10 percent Ni; 2 to 6 percent Mo; 0 to 3 percent Cu; 0 to 0.2 percent N; 0 to 1.5 percent Si; 0 to 1.5 percent Mn; 4 to 9 percent V; and 1.4 to 1.9 percent C. All percents are by weight of the total composition. The remainder of the composition is Fe and impurities.

Abstract: An iron base alloy having high wear resistance at elevated temperatures with good oxidation resistance contains 1-2.8 wt. % carbon, 3-16 wt. % chromium, 1-8 wt. % vanadium, 0.5-5 wt. % niobium, up to 14 wt. % molybdenum and up to 14 wt. % tungsten, the molybdenum and tungsten combined comprising 6-14 wt. % of the alloy.

Abstract: A roll shell, material is composed of C: 1.5.about.3.5%, Si: 1.5% or less, Mn: 1.2% or less, Cr: 5.5.about.12.0%, Mo: 2.0.about.8.0%, V: 3.0.about.10.0%, Nb: 0.6.about.7.0%, and satisfies the following formulae (1) and (2):V+1.8 Nb.ltoreq.7.5 C-6.0 (%) (1)0.2.ltoreq.Nb/V.ltoreq.0.8 (2)and remainder of Fe and inherent impurities.

Abstract: An improved thermal sprayable molybdenum-iron alloy powder useful for forming wear and abrasion resistant coatings having high thermal conductivity and preferably good corrosion resistance. The preferred embodiment of the alloy powder includes two distinct substantially uniformly dispersed solid solution phases of molybdenum, including a first low molybdenum concentration matrix phase and a second higher molybdenum concentration phase for forming improved dual phase molybdenum coatings. The preferred alloy powder composition includes 15-60% by weight molybdenum, 20-60% by weight iron and the preferred corrosion resistant alloy includes 3-35% by weight nickel plus chromium. A more preferred composition includes by weight 25-50% molybdenum, 4-10% chromium, 10-18% nickel and 1-3% carbon, plus silicon as required to promote fluidity and atomization. The most preferred composition comprises by weight 25-40% molybdenum, 4 to 8% chromium, 12 to 18% nickel, 1-2.5% carbon, 2-3% silicon, 0.2-1% boron and 25-50% iron.

Abstract: Air-meltable, castable, machinable, hardenable alloys that are very resistance to highly corrosive and abrasive slurries or fluids consisting essentially of, by weight, about 25% to about 37% chromium, about 12% to about 35% nickel, about 2% to about 7% molybdenum; about 1.3% to about 2% carbon, up to about 3% silicon, up to about 3% copper, up to about 4% manganese, up to about 1.5% tungsten, up to about 1% niobium, (columbium) and balance essentially iron plus the usual minor impurities.

Abstract: Alloys are provided which consist essentially of:______________________________________ CHROMIUM 11-20% By Weight NICKEL 3-10.5% MOLYBDENUM 1-4% CARBON 2-4.5% NITROGEN Up to about 0.25% SILICON 2.7-4% COPPER Up to about 4% COBALT Up to about 4% MANGANESE Up to about 4% ALUMINUM Up to about 0.2% Maximum COPPER + COBALT Up to 4% Total COPPER + COBALT + MANGANESE Up to 8% Total IRON & IMPURITIES Essentially Balance provided that NICKEL + 6-12.

Abstract: Heat resistant alloys which have excellent abrasion resistance in the 1200.degree. to 1400.degree. F. (650.degree. to 760.degree. C.) temperature range and good resistance to hot gas corrosion resistance to about 1600.degree. F. (870.degree. c.), consisting essentially of:______________________________________ CHROMIUM 11-20% BY WEIGHT NICKEL 3-10.5% MOLYBDENUM 1-4% ALUMINUM 0.25%-1.5% CARBON 2-4.5% NITROGEN UP TO 0.25% SILICON UP TO 2.5% COPPER UP TO 4% COBALT UP TO 4% MANGANESE UP TO 4% COPPER + COBALT UP TO 4% TOTAL COPPER + COBALT + UP TO 5% TOTAL MANGANESE IRON & IMPURITIES ESSENTIALLY BALANCE provided that NICKEL + COPPER + 6 TO 11.5% COBALT is 6 TO 12.

Abstract: A powder metallurgy wire for a dot printer is disclosed which consists, by weight, of 1.5 to 2.8% C, 7.5 to 12.0% Cr, at least one kind selected from the group consisting of not more than 18.0% W and not more than 11.0% Mo which W and Mo meet the relationship of 12.ltoreq.W+2Mo.ltoreq.22, 3 to 10% V, 1.0 to 10% Co, not more than 1.0% Si, not more than 1.0% Mn, the balance Fe and incidental impurities, the value of the difference of (C-Ceq) being in the range of -0.5 to -0.15 where Ceq=0.06.times.%Cr+0.033.times.%W+0.063.times.%Mo+0.2.times.%V. According to the composition, corrosion resistance and wear resistance are considerably improved, with light weight and high toughness.

Abstract: Sintered ferrous alloys of at least 90% theoretical density are obtained by sintering a powder mixture containing atomized copper-free ferrous slloy, copper phosphide and, optionally, copper, copper alloy and/or graphite to provide a sintered alloy containing, in percentages by weight, 0.6-2.5% carbon, 2-8% chromium, 4.2-20% copper, 0.5-10% molybdenum, 0.4-1.2 % phosphorus, 1-20% tungsten, 1-5% vanadium, and optionally, up to 12% cobalt, up to 2% manganese and up to 2% nickel and the balance being iron and less than 2% impurities. The % carbon content is in the range CCC % -0.1% to CCC % +0.3% (where CCC % is the calculated carbon content =(CWE/20)-0.4 and CWE=% tungsten content +twice % molybdenum content +six times % vanadium content) and the copper phosphide contains 2 to 14% phosphorus. The sintered compact is cooled at a rate which prevents hardening and can subsequently be machined and/or heat treated.

Abstract: A process for producing a corrosion-resistant protection on stabilizing wall surfaces and superheater tubes in sulfur-bearing hot gases which are used at surfaces temperatures of over 400.degree. C. in combustion installations, and a material in powder form which is suitable for that process, are intended to make it possible to use such wall surfaces and superheater tubes in sulfur-bearing hot gases in a good and durable fashion.For that purpose, to form a protective layer which is preferably from 0.2 to 1.5 mm in thickness, a metal powder which is sprayed out of a molten state, of a given composition, with a surface area of more than 200 cm.sup.2 /g, is applied with an autogenous flame spray torch, with a quantitative gas flow rate of between about 1000 to 3000 NL/h, or 1500 to 2500 NL/h, for the combustion gas. The preferred composition of the metal powder used in Cr 15% to 35%, Mn 0.05% to 3%, Mo 0.05% to 5.0%, C 0.1% to 3%, Si 0.1% to 3%, Al 2% to 15%, with the balance Fe.

Abstract: Cast steel has the composition (% by mass)______________________________________ carbon 1.6-3.0 silicon 1.2-1.6 manganese 11.0-15.0 chromium 9.0-10.8 cerium 0.001-0.2 vanadium 0.15-0.3 titanium 0.05-0.3 aluminium 0.05-0.15 boron 0.005-0.015 iron the balance. ______________________________________The steel according to the present invention is intended for the manufacture of articles, operating under conditions of an intensive shock-abrasive wear and high contact loads of a shock character.

Abstract: A super hard high-speed tool steel having a composition satisfying the condition of 0.ltoreq.C-Ceq.ltoreq.0.6 (where Ceq=0.06Cr+0.033 W+0.063 Mo+0.2 V within the range of 1.7.ltoreq.C.ltoreq.4.1%, the composition containing 3 to 10% of Cr, 1 to 20% of W, 1 to 15% of Mo (where 18.ltoreq.W+2Mo.ltoreq.40), 1 to 15% of V, not greater than 15% of Co, not greater than 2% of Si, not greater than 1% of Mn, and the balance substantially Fe and inevitable impurities, the steel further containing in uniformly dispersed state 2 to 12% in total of one, two or more selected from a group consisting of nitrides, carbides and carbonitrides of Ti, V, Zr, Nb, Hf and Ta in the composition. This tool steel exhibits a distinguished hardness of HRC 71 or higher, as well as toughness.

Abstract: A cast austenitic stainless steel bushing for relatively high temperature turbocharger and automotive applications is provided having good hot hardness and hot strength properties and a co-effficient of thermal expansion approximating that of the parent housing alloy. Bushings made of this alloy have a composition in the range of 29-32% chromium; 4-8% nickel, 1.0-1.5% columbium and tantalum; 1.3-1.7% carbon, 0.25-0.45% sulfur, 0.3-0.4% nitrogen, up to 1.0% manganese, up to 1.0% silicon, up to 1.0% molybdenum, up to 0.1% phosphorous, balance iron.

Abstract: Disclosed is an iron-base alloy eminently suited for use as components in nuclear energy installations. The alloy normally contains, in percent by weight, about 20% chromium, about 10% nickel, about 5.5% silicon, about 1.5% carbon, about 8% niobium plus vanadium, about 0.05% nitrogen, less than 1% cobalt as an impurity and the balance iron plus normal impurities found in alloys of this class.

Abstract: This invention relates to cast iron and more particularly to the improvement in the toughness and abrasive resistance of white cast iron along with a significant increase in tensile strength. More specifically, the present invention relates to a new white cast iron composition and a process for producing such cast iron having improved toughness, ductility and tensile strength while retaining desirable abrasive resistance through modification of the carbide morphology.