Abstract: A process for producing a dual-phase steel in which strip is hot-rolled and cooled to exhibit a substantially bainite structure throughout its cross-section and in which it is subsequently continuously annealed in the two phase ferrite/austenite field and cooled to transform the austenite to martensite. By inter-critically annealing a bainite as opposed to a ferrite/pearlite starting structure in accordance with this invention a very much finer and more uniform distribution of martensite is obtained--this gives rise to superior combinations of ductility and tensile strength.

Abstract: A high tensile steel which has a satisfactory yield strength of 60 kg/mm.sup.2 or more and excellent resistances to sulfide corrosive cracking and corrosion, and which comprises, as indispensable components, 0.05 to 0.50 wt % of C, 0.1 to 1.0 wt % of Si, 0.1 to 2.0 wt % of Mn, 0.05 to 1.50 wt % of Co and the balance consisting of Fe, is produced by hot- or cold-rolling it, rapidly heating the rolled steel to austenitize it, quenching the austenitized steel and, finally, tempering the quenched steel at a temperature not higher than the Ac.sub.1 point of the steel.

Abstract: Martensitic stainless cast steel suitable for use as turbine elements for water power plants having high cavitation erosion resistance and consisting essentially of carbon of 0.1 wt % or less, silicon of 1.0 wt % or less, manganese of 2.0-9.0 (exclusive of 2.0) wt %, nickel of 0.5-8.0 wt %, chromium of 11.0-14.0 wt %, and the balance of essentially iron.

Abstract: A method for the production of a homogeneous steel with reduced segregation of its ingredients by providing a continuous steel cast or steel ingot, the steel consisting of C.ltoreq.1.0%, Si.ltoreq.1.0% and Mn=0.2-3.0% plus one or more than two elements consisting of V.ltoreq.0.2%, Nb.ltoreq.0.2%, Mo.ltoreq.1.0%, Cu.ltoreq.2.0%, Cr.ltoreq.2.0%, Ni.ltoreq.3.0%, B.ltoreq.0.002%, Ti.ltoreq.0.1%, Al.ltoreq.0.1%, and Ca.ltoreq.0.01%, and the balance Fe and other unavoidable impurities, all percentages being by weight, subjecting the steel casting to a primary hot working at more than 20% reduction of area at an austenitic temperature range of less than 1200.degree. C. or at a temperature in the range from the Ar.sub.1 temperature to the Ac.sub.3 temperature in which two phases of austenite and ferrite coexist, and then to a soaking step wherein the core temperature of the steel casting stays at 1000.degree. C. or higher for a period of 30 minutes or longer.

Abstract: A high-strength, high-toughness steel with good workability is produced by working a steel containing 0.005-0.3% C and 0.3-2.5% Mn and optionally up to 1.5% Si, in the course of hot working thereof, at temperatures within the range of from the Ar.sub.3 point to 930.degree. C. or to 980.degree. C. (for a steel containing Nb, V, Ti and/or Zr) at an area reduction rate of at least 30%, and, in the course of cooling, rapidly cooling the steel in the ferrite phase precipitation temperature range when the ferrite phase has occupied 5-65% or 5-60% (for a steel with Si and/or Nb, V, Ti and/or Zr) of the steel, whereby a two-phase structure comprising ferrite and martensite is produced.

Abstract: Anticorrosion copper alloy essentially consisting of 4.5-32 wt % of Ni, 0.3-2.5 wt % of Fe, one or more elements selected from 0.01-1.0 wt % of In, 0.003-0.2 wt % of Pd and 0.003-0.1 wt % of Pt, and the balance of Cu and normal impurities. Further, an anticorrosion copper alloy essentially consisting of 4.5-22 wt % of Ni, 1.3-2.5 wt % of Fe, one or more elements selected from 0.1-1.0 wt % of In, 0.01-0.2 wt % of Pd and 0.01-0.1 wt % of Pt, and the balance of Cu and normal impurities; and said Fe being kept in a state of solid solution in a matrix of said copper alloy.

Abstract: Tensile strength and ductility of copper-base alloys having poor intermediate temperature range ductility are substantially increased by relatively small alloying additions of hafnium or zirconium.

Abstract: The properties of copper-tin-lead alloys are improved with respect to mechanical resistance and resistance to corrosion by the incorporation therein, in specific proportions of nickel. Antifriction layers on steel supporting strips are obtained by sintering and rolling onto steel strips metal powder particles obtained by powdering a metal alloy of 2-10% nickel, 8-27% lead, 0.5-10% tin and the balance copper.

Abstract: Alloys comprising copper, nickel and tin, when appropriately processed, exhibit high levels of tensile strength and ductility. Processing has been by cold working and aging or, when cold working is impracticable, by aging of alloys which are modified by the addition of a refractory element.It has been discovered that, even without cold working and even in the absence of additives, strong and ductile Cu-Ni-Sn alloys can be produced when a body of the alloy is subjected to a characteristic heat treatment to develop an alpha plus essentially nonlamellar gamma structure. This is followed by cooling and aging at a temperature and for a time corresponding to a predominantly spinodal alpha-1 plus alpha-2 structure.Typical properties are a 0.01 percent offset yield strength of 128 Kpsi and an elongation to fracture of 5 percent in an alloy comprising 15 weight percent Ni, 8 weight percent Sn, and remainder essentially Cu.

Abstract: A ferritic heat-resisting steel with an excellent toughness comprises0.03 to 0.10% by weight of carbon,0.1 to 1.0% by weight of silicon,1.5% by weight or less of manganese,1.5% to 2.7% by weight of molybdenum,7.0% to 10.0% by weight of chromium,0.01 to 0.1% by weight of niobium,0.02 to 0.12% by weight of vanadium,0.01 to 0.10% by weight of alloying element consisting of at least one member selected from the group consisting of rare earth elements having atomic numbers 57 through 71 and yttrium, andthe balance consisting of iron and unavoidable impurities, in which steel the ratio of the sum of the numbers of niobium and vanadium atoms to the number of carbon atoms is in the range of from 0.35 to 0.80; and the quantity (Cr%/30+Mo%/10-C%) and the content in percent of said alloying element fall on or within an irregular pentagon indicated in FIG.

Abstract: High strength, low alloy steel is produced, preferably as a hot rolled article (e.g. strip), to have a rimmed skin of essentially ferrite while having a main body or core which is aluminum-killed and comprises, for superior mechanical properties including yield strength, a suitable quantity of columbium and/or vanadium. The carbon, manganese and sulfur contents of the base metal, which provides the skin and plus the addition, the core, are preferably limited to provide special results as low alloy steel and also, by the same limitations, to provide auto sulfide shape control and thus to avoid unwanted directionality regarding toughness and bendability. The steel is made by pouring a mold 80-95% full of the base composition, then allowing the steel to rim for several minutes, and after a shell has solidified, continuing to pour while adding Al and Cb or V to the teemed stream, thereby providing an ingot with the above killed core, which can be hot reduced as desired.

Abstract: The process relates to a thermo-mechanical treatment of a precipitation henable Aluminium-Magnesium-Silicon electrical conductor alloy, after rapid cooling for keeping alloying elements in solution. The alloy is rolled during quenching from a temperature range between hot working temperature and quenching temperature, down to more particularly the alloy is rolled during a quenching operation after hot rolling, to produce wire rods which need no solution treatment before further drawing into wire and where necessity of aging is strongly reduced or eliminated.

Abstract: Steels such as standard carbon or alloy types that have too much carbon, i.e. 0.15% or (notably) more, to be rimmed, are produced in improved form by pouring a base melt of such steel which includes manganese up to 1.75% and other alloying elements if desired, and is sufficiently deoxidized, as with Si or Al, to be partially killed but not fully killed. Such pouring in an ingot mold is initially up to 80 to 95% full, under circumstances such that a shell solidifies, and pouring is continued, while adding into the still-molten core sufficient aluminum at least to kill the core and also as desired, other alloying or useful elements. The solidified ingot ultimately yields hot rolled bar products which are essentially aluminum-killed steel but have a partially killed skin and have superior surface conditions lacking blow holes, and being very appropriate for bar stock.

Abstract: A process for the energy efficient heat treatment of steels wherein a steel workpiece is rapidly heated to a temperature above the A.sub.3 temperature of the steel to convert the steel to austenite, the workpiece is then rapidly quenched in a liquid quench medium to convert the austenite to a predominantly martensitic microstructure, and the steel is then tempered by rapid heating while the workpiece is under tension, the tempering serving to convert the steel to a tempered martensitic form. The present invention virtually eliminates the problem of quench cracking and minimizes quench distortion as well as providing a finished product with improved uniformity, improved surface quality, and improved mechanical properties.

Abstract: A method for producing a superconductive wire of multifilaments having components comprising niobium and aluminum encased in copper or a copper alloy, wherein the multifilament configuration and the formation of a superconductive Al5 phase are positively developed from the components disposed in a copper or copper alloy tube having an interior metallic coating serving as a diffusion barrier, by cold forming and subsequent heat treatment.

Abstract: An alloy useful as a coinage alloy, especially as a cladding for a coin comprising a core and a cladding is disclosed. The alloy consists essentially of 4 to 6% nickel, 4 to 6% aluminum, balance copper and inevitable impurities which are due to the manufacture. Also disclosed are coins made therefrom having a gold-like color.

Abstract: A process for rolling steel rod is provided whereby rolling rod at delivery speeds in excess of 15,000 fpm and cooling same after laying it in spread-out ring form on a conveyor is made feasible with less risk of cobbles and improved rod quality especially in the medium to high carbon content range by entering the rod after rolling into the laying head and thereafter cooling same non-uniformly through a grain size growing phase and a transformation phase with the non-uniformity of cooling rate during the transformation phase being kept in substantially inverse proportion to the differences in effective grain size established in the first phase.

Abstract: The present invention relates to a sintering furnace for powder metallurgy of cemented carbides, cermets and ceramics, which comprises a main furnace body, a heating chamber provided in the main body, a table having a moving means for carrying a workpiece in or out of the heating chamber and a means for cooling the interior of the furnace with a heat exchanger fitted to the exterior of the main furnace body, and a method for the sintering and heat treatment of cemented carbides in the sintering furnace as claimed in claim 1, which comprises sintering cemented carbides and cooling rapidly at a cooling rate of at least 30.degree. C./min from the sintering temperature being at least a temperature at which a liquid phase appears to at most 1000.degree. C. by the use of an inert gas as a coolant.

Abstract: A Cr-Mo steel which is suitable for use as extremely thick plates of 75 mm or greater for pressel vessels of oil refinery, coal liquefaction and coal gasification equipment. The Cr-Mo steel includes 0.09 to 0.17 wt % of carbon, 0.03 to 0.50 wt % of silicon, 0.45 to 0.70 wt % of manganese, 1.80 to 3.40 wt % of chromium, 0.80 to 1.20 wt % of molybdenum, 0.035 to 0.1 wt % of aluminum and 0.0010 to 0.0040 wt % of boron and the balance iron and impurities inevitably mixed in steel-making processes. The Cr-Mo steel of such compositions is highly excellent in high-temperature strength, toughness and hydrogen attack resistance.

Abstract: An improved copper base alloy having excellent thermal resistance and electric conductivity. The alloy consists essentially of from 0.0005 to 0.01 percent boron, a material selected from the group consisting of phosphorus from 0.001 to 0.01 percent, indium from 0.002 to 0.03 percent, tellurium from 0.001 to 0.06 percent and mixtures thereof, and the balance copper and inevitable impurities. The copper base alloy may further contain from 0.002 to 0.05 percent magnesium whereby the magnesium imparts further enhanced thermal resistance to the alloy.