There is provided a regenerated member of a nickel-based alloy member for use in a turbine. The nickel-based alloy member is in a used condition. The regenerated member is a nickel-based alloy cast article including a phase as a matrix and a phase precipitating in the phase in a volume fraction of equal to or more than 30 vol % in an operational environment of the turbine. In a microstructure of the regenerated member, no recrystallized grains of the phase are present. And, when a GROD value of crystal grains of the phase of the used part undergone the solution/non-recrystallization heat treatment step is measured by electron back scattering diffraction analysis, the GROD value is equal to or more than 0.4 and equal to or less than 0.6.

A heat treatment method for an additive manufactured object formed of a laminate-molded Ni-base alloy includes: a heat treatment step for carbide precipitation optimization of heating the additive manufactured object for 1 hour or longer and 100 hours or shorter at a temperature which is equal to or higher than a temperature T1 determined by Formula (1) according to amounts of component elements and is equal to or lower than 1,350 C.; and an aging treatment step of heating the additive manufactured object for 1 to 30 hours at a temperature of 800 C. to 950 C. after the heat treatment step for carbide precipitation optimization.

T1 ( C.)=177Ni (%)+176Co (%)+172Cr (%)+178Mo (%)+174W (%)+171Al (%)+170Ti (%)+168Ta (%)+163Nb (%)+307C (%)16259(1)

A metal alloy is for use at very high temperature, in particular the metal alloy can be used in a process for the manufacture of mineral wool by fiberizing a molten mineral composition. The metal alloy contains the following elements, the proportions being shown as percentage by weight of the alloy: Cr 20 to 35% Fe 10 to 25% W 2 to 10% Nb 0.5 to 2.5% Ti 0 to 1% C 0.2 to 1.2% Co less than 5% Si less than 0.9% Mn less than 0.9%
the remainder consisting of nickel and unavoidable impurities.

The present invention relates to nickel alloys suitable for use in high temperature environments. For example, the nickel alloys of the present invention can be used in temperatures above 800 C. The nickel alloys may be used in the automotive industry, e.g. in turbocharge turbine wheels.

Disclosed is a NiCr-based brazing alloy including, on the basis of mass %: 15%<Cr<30%; 3%<P<12%; 0%<Si<8%; 0.01%<C<0.06%; 0%Ti+Zr<0.1%; 0.01%<V<0.1%; 0%Al<0.01%; 0.005%<O<0.025%; 0.001%<N<0.050%; 0%Nb<0.1%; and the balance being Ni and incidental impurities. Inequality (1): 0.20.24V %/C %1.0 is satisfied if the alloy contains no Nb, and Inequality (2): 0.2(0.24V %+0.13Nb %)/C %1.0 is satisfied if the alloy contains Nb. Also disclosed is an inexpensive NiCr-based brazing alloy containing a trace amount of V for use in the production of stainless steel heat exchangers and other steel articles. The alloy has a low liquidus temperature and high corrosion resistance, and achieves high brazing strength.

The present application refers to a connection for connecting hydraulic tubing as used by subsea devices, by using a shaped memory alloy material. The sleeve connection made of a shaped memory alloy material is originally manufactured with an internal diameter shorter than the external diameter of the tubing, internally has a cover material made of dielectric material and, most internally, has a layer of an anti-corrosive material which is contiguous to the external face of said tubing The layer of an anti-corrosive material internally has protruding portions designed to grasp the external surface of the tubing, forming streaks.

A Ni-based heat resistant alloy of the present invention contains predetermined amounts of C, Si, Mn, P, S, N, O, Ni, Co, Cr, Mo, W, B, Al, Ti, Nb, REM, Mg, Ca, and the balance of Fe and impurities, wherein [0.1Mo+W12.0], [1.04Al+2Ti+Nb12.0], and [P+0.2CrB<0.035] are satisfied, a shortest distance from a center portion to an outer surface portion of a cross section of an alloy member is 40 mm or more, the cross section being perpendicular to a longitudinal direction of the alloy member, an austenite grain size number at the outer surface portion is 2.0 to 4.0, a total content of Al, Ti and Nb which are present as precipitates obtained by extraction residue analysis satisfies [(Al+Ti+Nb).sub.PB/(Al+Ti+Nb).sub.PS10.0], and [YS.sub.S/YS.sub.B1.5] and [TS.sub.S/TS.sub.B1.2] are satisfied at a normal temperature.

A forging head for additive manufacturing, comprising a base portion and a forging portion. The forging portion extends from the base portion for forging a cladding layer during formation of the cladding layer by additive manufacturing. The forging head further comprising a through hole which is formed through the base portion and the forging portion, for at least one of an energy bean and an additive material to pass through during formation of the cladding layer.

An austenitic alloy based on nickel, chromium and iron, and having a high aluminum content, intended for use at a given operating temperature (Ts) between 900 C. and 1200 C., the alloy comprising the following elements, in weight percent: chromium between 20% and 32%, nickel between 30% and 60%, aluminum between 3.5% and 6%, carbon between 0.4% and 0.7%, titanium between 0.05% and 0.3%, niobium and/or tantalum between 0.6% and 2%, an element, composed of at least one rare earth and/or hafnium, between 0.002% and 0.1%, silicon between 0 and 0.5%, manganese between 0 and 0.5%, tungsten between 0 and 2%, and iron as the balance of the elements in the alloy. The alloy has less than 1% by volume of an intermetallic B2-NiAl phase and less than 1% by volume of an alpha prime phase rich in chromium, after subjecting the alloy to an operating temperature (Ts).

The present invention relates to a male electrical contact of twist-pin type comprising an electrical terminal formed by a bundle comprising three central strands made of nickel or made of copper and 7 peripheral strands made of NiCrTiAl alloy and a bulge in the central portion, it being possible for said alloy to optionally additionally comprise Co and/or Mo. It also relates to the use of this contact in a micro-D connector, advantageously for applications at a service temperature 260 C.