Abstract: A method of protecting and a protective coating for metal components formed of nickel or cobalt-based superalloys are disclosed. The protective coating essentially consists of the following constituents (in percent by weight):1 to 20% rhenium,15 to 50% chromium,0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%,0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and0 to 3% silicon, impurities, as well as the following elective components:0 to 5% hafnium,0 to 12% tungsten,0 to 10% manganese,0 to 15% tantalum,0 to 5% titanium,0 to 4% niobium, and0 to 2% zirconium,the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt. The protective coating is primarily suited for use with metal components in gas turbines and aircraft engines.

Abstract: An Fe-Cr-Al alloy having excellent oxidation resistance and high temperature brittleness resistance comprises:Cr: 10 to 28 wt. %,Al: 1 to 10 wt. %, andB : 0.0003 to 0.010 wt. %,andLa: 0.01 to 0.20 wt. % andZr: 0.01 to 1.0 wt. %,while within the scope of Equation (1)0.1.ltoreq.[wt. % of Zr]/[wt. % of La].ltoreq.20 (1)and wherein elements of impurities are limited as follows:C: 0.05 wt. % or less,N: 0.02 wt. % or less,Si: 0.5 wt. % or less,Mn: 1.0 wt. % or lessTi: less than 0.05 wt. %and the balance consisting of Fe and incidental impurities.

Abstract: Ferritic heat-resisting cast steel, which intends to highten the applicability for use of the exhaust manifold of a vehicle engine without losing oxidation resistance, machinability and structural stability, containing, on a weight basis, 0.05 to 0.5% C, 1.0 to 2.0% Si, less than 0.6% Mn, less than 0.04% P, less than 0.04% S, less than 0.5% Ni, 10 to 20% Cr, 0.1 to 1.0% V, 0.5 to 1.0% Nb, 0.08 to 0.50% Mo, less than 0.01% W and 0.01 to 0.2% Ce, the balance of its composition being iron. Alternatively, it may contain 0.1 to 1.5% Mn and 0.01 to 0.2% S, and may further contain 0.01 to 0.2% Te and/or 0.01 to 0.3% Al. Further, it may contain 0.1 to 5.0% Co and/or 0.1 to 5.0% Ti. The cast steel is annealed at a temperature of 850.degree. C. to 1000.degree. C. for one to five hours.

Abstract: Air-meltable, castable, machinable, weldable heat-resistant alloys that are very resistant to hot gas corrosion and that exhibit high creep rupture strengths. The alloys are, by weight, about 7.5 to aboout 18% nickel, about 23.5 to about 35% chromium, about 0.85 to about 1.4% carbon, about 0.2 to about 1.8% molybdenum, about 0.2 to about 1.6% tungsten, about 0.1 to about 1.6% columbium (niobium), about 0.2 to about 4% manganese, about 0.2 to about 2.5% silicon, up to about 1.5% cobalt, up to about 0.6% titanium, up to about 0.4% zirconium, up to about 0.4% rare earth elements, up to about 0.1% boron, up to about 0.7% nitrogen, and the balance essentially iron plus the usual minor impurities.

Abstract: A high cold-forging electromagnetic stainless steel comprises not more than 0.02 wt. % of C, not more than 0.50 wt. % of Si, not more than 0.50 wt. % of Mn, 10.0-18.0 wt. % of Cr, 0.30-1.50 wt. % of Mo, 0.05-0.50 wt. % of Ti, 0.30-2.00 wt. % of Al, 0.0005-0.05 wt. % of B, not more than 0.05 wt. % of N and the balance being substantially Fe. This steel may further contain a given amount of at least one of Nb, V, Pb, Ca, Se, S and REM. Such stainless steel is used as a material of parts in an electronically controlled fuel injection system.

Abstract: An element is disclosed for filtering and/or purifying hot gases, comprising a fibrous structure with a predetermined degree of porosity and formed of metal alloy fibrils of the MCrAlX type, in which M is a matrix chosen from iron and/or nickel and/or cobalt, and X is an element reinforcing the adhesion of the oxide layer which is formed on the fibrils in contact with the hot gases, chosen from zirconium, yttrium, cerium, lanthanum and misch metal.

Abstract: A protective coating for metal components formed of nickel or cobalt-based superalloys essentially consists of the following constituents (in percentages by weight):1 to 20% rhenium,22 to 50% chromium,0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%,0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and0 to 3% silicon,impurities, as well as the following elective components:0 to 5% hafnium,0 to 12% tungsten,0 to 10% manganese,0 to 15% tantalum,0 to 5% titanium,0 to 4% niobium, and0 to 2% zirconium,the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.

Abstract: High Al austenitic steels are particularly susceptible to deterioration of the hot workability and suffer from severe cracking during hot working, with working becoming impossible in some cases. The present invention remarkably improves the hot workability by strictly limiting the impurities in the steel, in particular the S, O, Mg, Pb, Bi, etc. That is, the present invention reduces the S and O by adding one or more of Ca, Y, and REM to satisfy the range of -50<(S)+(O)-0.8.times.(Ca)-0.2.times.(Y)-0.1 .times.(REM)<30 (unit: ppm) and further limits the Mg to no more than 100 ppm, the Pb to no more than 10 ppm, and the Bi to no more than 5 ppm. According to the present invention, it is possible to obtain a high Al austenitic heat-resistant steel superior in hot workability which is free from occurrence of edge cracks, surface flaws, and other surface defects during hot rolling, hot casting, etc.

Abstract: A stainless steel exhibiting excellent anticorrosion property for use in engine exhaust systems comprises not more than 0.010% C, not more than 0.2% Si, 0.05%-1.5% Mn, 12%-20% Cr, 0.2%-3.0% Mo, 0.005%-0.1% Al, not more than 0.015% N, not more than 0.025% P, not more than 0.010% S, either or both of 10.times.(C %+N %)-0.5% Ti and 5.times.(C %+N %) 0.5% Nb, and the balance of Fe and unavoidable impurities. An additional improvement in the anticorrosion property of the stainless steel can be obtained by further adding thereto one or more of 0.1%-1.0% Ni, 0.03%-1.0% Cu, 0.05%-0.5% W, 0.05%-0.5% V and 0.05%-1.0% Zr and/or one or both of 0.001%-0.03% Ca and 0.001%-0.03% Ce.

Abstract: A heat-resistant ferritic cast steel having excellent thermal fatigue resistance, consisting, by weight, of 0.25 to 0.45% C, 0.3 to 2.0% Si, not more than 1.0% Mn, 17 to 22% Cr, at least one kind selected from the group consisting of not more than 6% Co and not more than 1.5% Ni, the amount of % Co+3 % Ni being in the range of 1 to 6%, 0.006 to 0.1% of at least one kind selected from the group consisting of Y and rare earth elements, and the balance Fe and incidental impurities, the ferritic cast steel being composed of a structure in which .alpha. ferrite and M.sub.23 C.sub.6 carbide are dispersed in .delta. ferrite. With this specific composition, even at high temperatures, there can be maintained the structure which has the .alpha. ferrite and the M.sub.23 C.sub.6 dispersed in the .delta. ferrite, with the result that there is obtained an excellent thermal fatigue resistance, and in this structure, the transformation under heating will not occur even at a temperature of about 1,000.degree. C.

Abstract: Fe-Cr-Ni-Al ferritic alloy capable of forming hot oxidation/corrosion resistive aluminum oxide scale in the surface thereof by exposure to oxidation environments at elevated temperatures. Due to the ferritic structure, the aluminum oxide scale is formed uniformly and densely to improve scale adherence, or prevent scale flaking. The mechanical properties of the ferritic alloy is considerably improved by incorporation of controlled amounts of Cr, Ni, and Al relative to each other, which are added to precipitate minute Ni-Al intermetallic compounds in the alloy matrix while retaining the ferritic structure. Such minute Ni-Al intermetallic compounds are thought to be responsible for improved mechanical properties, including high temperature strength, tensile strength, hardness and the like. Whereby, the alloy combine excellent hot oxidation/corrosion resistance and improved mechanical properties.

Abstract: This invention relates to heat and corrosion resistant alloys for structural parts in industrial furnaces and similar installations requiring hot strength, long life and resistance to hot gas corrosion, carburization and thermal fatigue, and to master alloys to aid in the production of these alloys. The alloys consist of additions of less than one percent by weight each of the components tungsten, zirconium, molybdenum, columbium, titanium and one or more rare earth elements to base alloys of the types standardized by the Alloy Castings Institute Division of the Steel Founders Society of America or to similar base alloys. The master alloys consist of all of these components, with the possible exception of Mo, combined together in the desired proportions, possibly along with some combination of iron, nickel or chromium in total content of up to about half of the master alloys by weight as partial diluents. The resultant master alloys are always denser than molten baths of the base heat resistant alloys.

Abstract: A high corrosion-resistant electromagnetic stainless steel comprises particular amounts of C, Si, Mn, Cr, Mo, Ti, Cu, Al and the balance being Fe, and is used as a material for a housing of electronically controlled fuel injection system for automobile or an electromagnetic valve. This steel may further contain particular amounts of Pb, Ca, Se, S and rare earth elements, if necessary.

Abstract: A heat-resistant stainless steel foil for a catalyst-carrier of combustion exhaust gas purifiers, consisting essentially in weight percentage of:more than 0.06 up to 0.15 of Ln, the Ln being a mixture of La, Ce, Pr and Nd;from 8x(%Ln+0.015) /45 to 0.1 of P;from 4.5 to 6.5 of Al;from 13 to 25 of Cr;not more than 0.025 of C;not more than 0.02 of N;not more than 0.03 of C+N; andthe balance consisting of Fe and unavoidable impurities.

Abstract: A steel suitable for a hot working press tool used for a slab width sizing press comprises particular amounts of C, Si, Cr, Mn, Mo, V and N having a specific Cr equivalent, or particular amounts of C, Si, Mn, Mo, V, Cr and Ni having a specified Cr/Ni ratio.

Abstract: This invention relates to iron-base alloy compositions, nickel containing austenitic ferrous alloy compositions (especially low nickel compositions) and dopants added to low nickel austenitic alloys as a means of improving the elevated temperature oxidation resistance of the resultant material.

Abstract: A dispersion strengthened ferritic steel cladding tube for use in a nuclear reactor and having a double-layer structure is provided. The cladding tube comprises a tube body made of a dispersion strengthened ferritic steel having a ceramic dispersed therein and containing 8 to 13% by weight of chromium. The inner surface of the tube body is lined with a ferritic steel containing 18 to 30% by weight of chromium. The cladding tube has not only excellent compatibility with a mixed oxide fuel but also excellent high temperature strength and swelling resistance.A method of producing the cladding tube using powder metallurgy is also provided.

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 hybrid or printed circuit is formed on a substrate (1) which comprises an iron-chromium-aluminum alloy which may also contain Yttrium and which forms a stable inert strongly adhering ceramic layer (5,6) on its exposed surfaces when heated in an oxidizing atmosphere in order to produce a hybrid circuit a dielectric paste is printed on the ceramic surface (5) of the alloy to form a platform (9). Conductors (10,11) are then printed on the dielectric platform (9) and fired. One or more component(s) (8) is/are then soldered to the conductors.

Abstract: A high oxidotion resistance Fe-Cr-Al alloy stainless steel foil suitable for forming catalytic converters, specifically for forming automotive catalytic converters. The alloy includes:C: less than or equal to 0.02 Wt %;Si: less than or equal to 1.0 Wt %;Cr: in a range greater than or equal to 14 Wt % to less than or equal to 27 Wt %;Al: in a range greater than or equal to 3.5 Wt % to less than or equal to 6.5 Wt %;La: in a range greater than 0.05 Wt % and less than or equal to 0.20 Wt %;Ce: less than or equal to 0.01 Wt % and the remainder being composed of Fe and inevitable impurities, the foil having a thickness less than or equal to 80 .mu.m.

Abstract: A non-magnetic steel material suitable for use in various steel and concrete structures such as magnetic floating high-speed railways, nuclear fusion facilities and marine structrures and appliances where non-magnetic properties are required. The steel composition contain (by weight):C: not more than 1.0%Si: not more than 0.25%Mn: not more than 2.0%Al: more than 20.0 to 37.3%P: not more than 0.015%S: not more than 0.005%Cr: more than 5.5 to 15.0%and may further contain at least one of Ti, V, Nb, W, Co, Mo and B in an amount ranging from 0.01 to 0.5% for the elements other than B, and in an amount ranging from 0.0001 to 0.005% for B, and at least one of Cu and Ni in an amount ranging from 0.1 to 5.5%.

Abstract: A new cast high silicon heat resistant alloy is provided having the broad composition of about 0.16 to 0.30% carbon, about 3.2 to 4.5% silicon, about 0.8 to 1.5% aluminum, about 17 to 20% chromium, about 12 to 16% nickel, up to about 2% manganese, 0 to 0.07% rare earth alloys and the balance iron with residual impurities in ordinary amounts. The alloy is an austenitic chromium and nickel containing alloy having high strength and corrosion resistance.

Abstract: 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 protective oxide scale and modify predominantly anion and to a lesser extent cation transport through the oxide scale, greatly reducing the amount of oxidation observed due to elevated temperature exposure.