The present disclosure belongs to the technical field of alloy preparation and provides a nickel-based superalloy and a preparation method thereof. In the present disclosure, the nickel-based superalloy includes the following components by mass percentage: C: 0.07% to 0.10%, 0<Si≤1.00%, 0<Mn≤1.50%, P≤0.020%, S≤0.005%, Cr: 19.0% to 23.0%, Ni: 31.0% to 34.5%, 0<Cu≤0.75%, Al: 0.15% to 0.60%, Ti: 0.15% to 0.60%, and Fe as a balance. In terms of mass percentage, Ni is adjusted to 31.0% to 34.5%, while P is controlled at less than or equal to 0.020% and S is controlled at less than or equal to 0.005%, thereby improving mechanical properties. The examples show that the nickel-based superalloy has a tensile strength of greater than or equal to 460 MPa, a specified plastic elongation strength of greater than or equal to 180 MPa, and an elongation at break of greater than or equal to 35%.

The present disclosure relates to KINIZ alloys having a homogeneous microstructure. A KINIZ alloy includes: copper (Cu) and iron (Fe) in a total amount of 75 wt % to 95 wt %; and nickel (Ni) in an amount of 1 wt % to 20 wt %, zirconium (Zr) in an amount of 0.1 wt % to 5.0 wt %, and a balance of inevitable impurities. A KINIZ alloy includes: copper (Cu) and iron (Fe) in a total amount of 75 wt % to 95 wt %; and manganese (Mn) in an amount of 2.0 wt % to 5.0 wt %, zirconium (Zr) in an amount of 0.3 wt % to 1.0 wt %, and a balance (excluding 0%) of inevitable impurities.

Provided are: an alloy powder in which nickel and cobalt can be easily dissolved in an acid and stably leached with an acid; a manufacturing method with which an alloy powder that enables stable acid leaching can be obtained at low cost; and a method for recovering a valuable metal using the manufacturing method. An alloy powder according to the present invention includes copper (Cu), nickel (Ni), and cobalt (Co) as constituents, has a 50% cumulative diameter (D50) of 30 .Math.m to 85 .Math.m in the volume particle size distribution, and has an oxygen content of 0.01 mass% to 1.00 mass%.

Provided are: an alloy powder in which nickel and cobalt can be easily dissolved in an acid and stably leached with an acid; a manufacturing method with which an alloy powder that enables stable acid leaching can be obtained at low cost; and a method for recovering a valuable metal using the manufacturing method. An alloy powder according to the present invention includes copper (Cu), nickel (Ni), and cobalt (Co) as constituents, has a 50% cumulative diameter (D50) of 30 .Math.m to 85 .Math.m in the volume particle size distribution, and has an oxygen content of 0.01 mass% to 1.00 mass%.

This invention relates to magnetocaloric materials comprising alloys useful for magnetic refrigeration applications. In some embodiments, the disclosed alloys may be Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2.sup.nd order magnetic phase transitions near their curie temperature, thus there are limited thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. Surprisingly, the performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.

A highly corrosion-resistant Ni—Cr Mo—N alloy including in weight %, Ni: 22.0% or more, Cr: 22.0% or more, Mo: 5.0% or more, N: 0.180% or more, Si, Al, Mn, Fe as a remainder, and inevitable impurities, wherein the composition satisfies the following Formulas (1) to (3), and an area ratio of a sigma phase in a cross-sectional structure measured by EBSD after holding at 950° C. for 30 minutes is 1.0% or less

Cr+3.3×Mo+16×N≥43.0  (1)

7.3×Mo—Ni≤21.0  (2-1)

1.3×≤5.7  (2-2)

1.6×Si+0.99×Mn+2.2×Al≤0.95  (3).

A highly corrosion-resistant Ni—Cr Mo—N alloy including in weight %, Ni: 22.0% or more, Cr: 22.0% or more, Mo: 5.0% or more, N: 0.180% or more, Si, Al, Mn, Fe as a remainder, and inevitable impurities, wherein the composition satisfies the following Formulas (1) to (3), and an area ratio of a sigma phase in a cross-sectional structure measured by EBSD after holding at 950° C. for 30 minutes is 1.0% or less

Cr+3.3×Mo+16×N≥43.0  (1)

7.3×Mo—Ni≤21.0  (2-1)

1.3×≤5.7  (2-2)

1.6×Si+0.99×Mn+2.2×Al≤0.95  (3).

A probe pin material including a Ag—Pd—Cu-based alloy essentially including Ag, Pd and Cu, B as a first additive element, and at least any element of Zn, Bi and Sn, as a second additive element. A concentration of the first additive element is 0.1 mass % or more and 1.5 mass % or less, and a concentration of the second additive element is 0.1 mass % or more and 1.0 mass % or less. A Ag concentration, a Pd concentration and a Cu concentration in the Ag—Pd—Cu-based alloy are required as follows: a Ag concentration (S.sub.Ag), a Pd concentration (S.sub.Pd) and a Cu concentration (S.sub.Cu) converted as given that a Ag—Pd—Cu ternary alloy is formed from only such three elements all fall within a predetermined range in a Ag—Pd—Cu ternary system phase diagram. The probe pin material is excellent in resistance value and hardness/wear resistance, and also is enhanced in bending resistance.

A probe pin material including a Ag—Pd—Cu-based alloy essentially including Ag, Pd and Cu, B as a first additive element, and at least any element of Zn, Bi and Sn, as a second additive element. A concentration of the first additive element is 0.1 mass % or more and 1.5 mass % or less, and a concentration of the second additive element is 0.1 mass % or more and 1.0 mass % or less. A Ag concentration, a Pd concentration and a Cu concentration in the Ag—Pd—Cu-based alloy are required as follows: a Ag concentration (S.sub.Ag), a Pd concentration (S.sub.Pd) and a Cu concentration (S.sub.Cu) converted as given that a Ag—Pd—Cu ternary alloy is formed from only such three elements all fall within a predetermined range in a Ag—Pd—Cu ternary system phase diagram. The probe pin material is excellent in resistance value and hardness/wear resistance, and also is enhanced in bending resistance.

A process of producing an austenitic stainless steel tube comprises the steps of: a) producing an ingot or a continuous casted billet of the austenitic stainless steel, b) hot extruding the ingot or the billet obtained from step a) into a tube, c) cold rolling the tube obtained from step b) to a final dimension thereof.
The outer diameter D of the cold rolled tube is 70-250 mm and the thickness t thereof is 6-25 mm, and the cold rolling step is performed such that the following formula is satisfied:
(2.5×Rc+1.85×Rh−17.7×Q)=(Rp0.2target+49.3−1073×C−21Cr−7.17×Mo−833.3×N)±Z  (1)
wherein Rp0.2target is targeted yield strength and is 750≤R.sub.p0.2target≤1000 MPa, 30≤Rc≤75%, 50%≤Rh≤90%, 1≤Q≤3.6, and Z is 65.