The present invention provides a hot-forgeable Ni-based superalloy excellent in high temperature strength, including, in terms of % by mass: C: more than 0.001% and less than 0.100%, Cr: 11.0% or more and less than 19.0%, Co: 0.5% or more and less than 22.0%, Fe: 0.5% or more and less than 10.0%, Si: less than 0.1%, Mo: more than 2.0% and less than 5.0%, W: more than 1.0% and less than 5.0%, Mo+½W: 2.5% or more and less than 5.5%, S: 0.010% or less, Nb: 0.3% or more and less than 2.0%, Al: more than 3.00% and less than 6.50%, and Ti: 0.20% or more and less than 2.49%, with the balance being Ni and unavoidable impurities, in which (Ti/Al)×10 is 0.2 or more and less than 4.0 in terms of atomic ratio, and in which Al+Ti+Nb is 8.5% or more and less than 13.0% in terms of atomic %.

A method for producing a ring-rolled material of an Fe—Ni based superalloy, which has a high circularity, can inhibit AGG, and can inhibit grain growth. A method for producing a ring-rolled material of an Fe—Ni based superalloy having a composition of an Alloy 718 comprises: a finishing ring rolling step of heating a ring-shaped material for ring rolling having the composition, in a temperature range of 900° C. to 980° C., and performing finishing ring rolling; and a circularity correcting step of correcting an ellipticalness of the ring-rolled material that has been rolled in the finishing ring rolling step, while expanding a diameter of the ring-rolled material by using a ring expander including a pipe-expanding cone and a pipe-expanding die, wherein the ring-rolled material that has been rolled in the finishing ring rolling step is subjected to circularity correction without being reheated or after having been heated to up to 960° C.

A method for producing a high temperature component includes a shaping step of shaping a powder compact of a desired high temperature component shape using a specific powder shaping method, from an alloy powder of γ′ precipitation strengthening-type Ni-based alloy, and a crystal grain coarsening step of coarsening a crystal grain size of the powder compact by heat treatment, wherein the powder compact contains 0.002% or more and 0.07% or less of C, and 5.40% or more and 8.40% or less of Al+Ti by mass percentage.

In a method for heat treating alloy compositions within UNS N07028 the alloy composition is heated at a temperature between 1550° F. and 1750° F. for at least two hours, and then heated at a lower temperature between 1300° F. and 1550° F. for at least two hours. The alloy composition may be heated at a temperature between 1850° F. and 1950° F. for at least one hour before heating the alloy composition at a temperature between 1550° F. and 1750° F.

A manufacturing method provides a high-quality material for ring rolling. The manufacturing method of the material for ring rolling includes a step of heating a disk-shaped material for hot forging to a hot working temperature, a step of arranging the material for hot forging onto a lower die having a convex portion with a truncated conical shape, a step of forming a thin portion by pressing a center portion of the material for hot forging by using an upper die having a convex portion with a truncated conical shape, and a step of manufacturing a material for ring rolling by removing the thin portion wherein a center of gravity on a half section of the material for ring rolling is located so as to be closer to an outer peripheral surface of the half section than a center of the half section in a thickness direction of the half section.

Thermal barrier materials are provided that possess low heat capacity and low thermal conductivity, while at the same time, high structural integrity and robustness. In some embodiments, the disclosed coating comprises metal-containing spheres that are sintered or glued together and/or embedded in a matrix. The coating has at least 60% void volume fraction and closed porosity. The coating thickness is from 50 microns to 500 microns, and the metal spheres have an average diameter that is from about 5% to about 30% of the coating thickness. In some embodiments, the metal spheres have an average diameter that is 4-10 times smaller than the coating thickness. Thermal barrier materials with these coatings can be beneficial in engine applications, for example.

A welding filler metal or a welding filler metal product having, in weight percent: 17.0-23.0% chromium, 5.0-12.0% molybdenum, 3.0-11.0% tungsten, 3.0-5.0% niobium, 0-2.0% tantalum, 1.2-3.0% titanium, 0.005-1.50% aluminum, 0.0005-0.100% carbon, <2.0% iron, <5.0% cobalt, and balance nickel wherein the nickel is 56.0-65.0%. A weld deposit formed from the welding filler metal has a minimum yield strength in the as-welded condition of at least 72 ksi (496 MPa). Also, a weld deposit and a method of forming a weld deposit comprising, in weight percent: 17.0-23.0% chromium, 5.0-12.0% molybdenum, 3.0-11.0% tungsten, 3.0-5.0% niobium, 0-2.0% tantalum, 1.2-3.0% titanium, 0.005-1.50% aluminum, 0.0005-0.100% carbon, <8.0% iron, <5.0% cobalt, and balance nickel wherein the nickel is 56.0-65.0%. The weld deposit has a minimum yield strength in the as-welded condition of at least 72 ksi (496 MPa).

There are provided coated articles that include two or more infrared (IR) reflecting layers (e.g., of or including NbZr, Nb, NiCr, NiCrMo, and/or a nitride thereof) sandwiched between at least dielectric layers, and/or a method of making the same. The coating may be designed so that the coated articles realize bronze glass side reflective coloration in combination with a low solar factor (SF) and/or a low solar heat gain coefficient (SHGC). Such coated articles may be used in the context of monolithic windows, insulating glass (IG) window units, laminated windows, and/or other suitable applications, and may optionally be heat treated (e.g., thermally tempered) in certain instances.

A method of repairing an oxidized defect in a superalloy article includes removing substantially all of the oxidized defect to form a cleaned out portion of the superalloy article; filling a portion of the cleaned out portion with a weld by fusion welding; cracking the weld; and filling the cracked weld and a remaining portion of the cleaned out portion with a braze material.

A Ni-based alloy having excellent hot forgeability and corrosion resistance includes, by mass %, Cr: more than 18% to less than 21%, Mo: more than 18% to less than 21%, Ta: 1.1% to 2.5%, Mg: 0.001% to 0.05%, N: 0.001% to 0.04%, Mn: 0.001% to 0.5%, Si: 0.001% to 0.05%, Fe: 0.01% to 1%, Co: 0.01% or more and less than 1%, Al: 0.01% to 0.5%, Ti: 0.01% or more and less than 0.1%, V: 0.005% or more and less than 0.1%, Nb: 0.001% or more and less than 0.1%, B: 0.0001% to 0.01%, Zr: 0.001% to 0.05%, and a balance consisting of Ni and unavoidable impurities.