Abstract: A sufficient sealing property of a through hole is ensured. A sealing structure includes a cylindrically-shaped body part inserted into the through hole, formed of a thin plate of a first thickness, one end of the body part being open and another end of the body part being closed, a tapered part connected to the opened one end of the body part and including a diameter gradually expanding outward as a distance from the body part increases, and a first bent part connected to the tapered part, formed of a thin plate thinner than the first thickness, and bent inward so that a protruding part protruding outward elastically abuts against an inner peripheral surface of the through hole.

Abstract: A sufficient sealing property of a through hole is ensured. A sealing structure includes a cylindrically-shaped body part inserted into the through hole, formed of a thin plate of a first thickness, one end of the body part being open and another end of the body part being closed, a tapered part connected to the opened one end of the body part and including a diameter gradually expanding outward as a distance from the body part increases, and a first bent part connected to the tapered part, formed of a thin plate thinner than the first thickness, and bent inward so that a protruding part protruding outward elastically abuts against an inner peripheral surface of the through hole.

Abstract: To provide a fastening method and a fastening device for a self-piercing rivet so that the adhesive force of the adhesive applied between the members to be fastened can be exerted to a greater degree, a rivet fastening method comprises a step of preparing at least two plates stacked via an adhesive layer; a step of preparing a rod-shaped punch having at least two openings and an air flow path through which the at least two openings are communicated; a step of preparing a self-piercing rivet with a through hole; and a step of driving the self-piercing rivet into the at least two plates with the punch so that one of the at least two openings in the punch faces the through hole of the self-piercing rivet.

Abstract: Disclosed is a turbine blade for an industrial gas turbine including a blade substrate; a multilayer alloy coating containing a diffusion barrier layer; a bond coat; and a top coat. The blade substrate being formed of a single crystal alloy which consists essentially of 0.06 to 0.08% of C, 0.016 to 0.035% of B, 0.2 to 0.3% of Hf, 6.9 to 7.3% of Cr, 0.7 to 1.0% of Mo, 7.0 to 9.0% of W, 1.2 to 1.6% of Re, 8.5 to 9.5% of Ta, 0.6 to 1.0% of Nb, 4.9 to 5.2% of Al, 0.8 to 1.2% of Co, and the balance being Ni and incidental impurities by weight. The multilayer alloy coating, the bond coat and the top coat being directly and sequentially laminated on a surface of the blade substrate, in which the diffusion barrier layer is a multilayer and a discontinuous layer.

Abstract: A turbine blade for industrial gas turbine is used which includes a blade substrate formed of a single-crystal heat-resistant alloy containing C: 0.06 to 0.08%, B: 0.016 to 0.035%, Hf: 0.2 to 0.3%, Cr: 6.9 to 7.3%, Mo: 0.7 to 1.0%, W: 7.0 to 9.0%, Re: 1.2 to 1.6%, Ta: 8.5 to 9.5%, Nb: 0.6 to 1.0%, Al: 4.9 to 5.2%, Co: 0.8 to 1.2%, and the remainder substantially consisting of Ni with reference to mass, and includes a diffusion barrier layer, a metal layer, a bond coat, and a top coat, these layers and coats being stacked in this order on a surface of the blade substrate, the metal layer having a thickness of 5 to 30 ?m. Thus, the turbine blade can be provided which has a thermal barrier coating formed without loss of a function of the diffusion barrier layer.

Abstract: In an alloy coating film having a diffusion barrier layer and an aluminum reservoir layer on a substrate, the diffusion barrier layer is composed of a single phase that is a Re—Cr—Ni—Al system ? phase containing Al by less than 1 atomic %, or composed of a first phase which is the Re—Cr—Ni—Al system ? phase and one or more second phases selected from a ? phase, ?? phase and ? phase.

Abstract: Disclosed is a multilayer alloy coating film capable of maintaining heat resistance, high-temperature oxidation resistance and creep resistance for a long time even in an ultra high temperature environment. The multilayer alloy coating film comprises a barrier layer formed on a base surface, and an aluminum reservoir layer formed on the barrier layer and composed of an alloy containing Al. The barrier layer comprises an inner sacrificial barrier layer composed of an alloy containing Re, an inner stabilization layer formed on the inner sacrificial barrier layer, a diffusion barrier layer formed on the inner stabilization layer and composed of an alloy containing Re, an outer stabilization layer formed on the diffusion barrier layer, and an outer sacrificial barrier layer formed on the outer stabilization layer and composed of an alloy containing Re.

Abstract: A diffusion barrier alloy film has a diffusion barrier layer which has more excellent diffusion barrier properties than an Re—Cr alloy film, and can stand usage at higher temperatures (e.g., 1150° C. or higher). The diffusion barrier layer is made of an Re—W alloy ? phase containing 12.5 to 56.5% of W in terms of atomic composition and the remainder of Re excluding unavoidable impurities. A metal base has a surface coated with a diffusion barrier layer. If required, the diffusion barrier layer has a surface coated with a diffusion alloy layer containing 10% or greater and less than 50% of Al, Cr, or Si in terms of atomic composition, providing a high-temperature apparatus member.

Abstract: A metal substrate is embedded in a diffusion and penetration processing agent containing metal oxide, active metal and catalytic compound and heat treatment is carried out, so that an oxidation resistant alloy coating film containing the metal constituting the metal oxide and the active metal is produced. Al2O3, Cr2O3, SiO2 or the like are used as the metal oxide, Hf, Zr, Y, Ti, La, Ce, Mg, Ca or the like are used as the active metal, and NH4Cl, NH4F, HCl, NaCl, NaF or the like are used as the catalytic compound. The metal substrate is Ni, Ni-based alloy, Fe-based alloy, and Co-based alloy. Heat treatment is carried out, for example, at a temperature of 700˜1340° C. for 1 minute˜25 hours in an atmosphere of inert gas or hydrogen gas.

Abstract: In an alloy coating film having a diffusion barrier layer and an aluminum reservoir layer on a substrate, the diffusion barrier layer is composed of a single phase that is a Re—Cr—Ni—Al system ? phase containing Al by less than 1 atomic %, or composed of a first phase which is the Re—Cr—Ni—Al system ? phase and one or more second phases selected from a ? phase, ?? phase and ? phase.

Abstract: Disclosed is a multilayer alloy coating film capable of maintaining heat resistance, high-temperature oxidation resistance and creep resistance for a long time even in an ultra high temperature environment. The multilayer alloy coating film comprises a barrier layer formed on a base surface, and an aluminum reservoir layer formed on the barrier layer and composed of an alloy containing Al. The barrier layer comprises an inner sacrificial barrier layer composed of an alloy containing Re, an inner stabilization layer formed on the inner sacrificial barrier layer, a diffusion barrier layer formed on the inner stabilization layer and composed of an alloy containing Re, an outer stabilization layer formed on the diffusion barrier layer, and an outer sacrificial barrier layer formed on the outer stabilization layer and composed of an alloy containing Re.

Abstract: Disclosed is a method of forming a high-temperature corrosion-resistant film, which comprises placing a container containing a film-forming fine powder and a target member capable of being heated by an electric current heating process, in an atmosphere-controllable treatment chamber, and floating the fine powder and subjecting the target member to the electric current heating process to allow vapor of the fine powder generated by the heating to be diffused into the target member from a surface thereof so as to form a diffusion film layer, and allow the floated fine powder to be attached onto the surface so as to form a fine-powder film layer on the diffusion film layer. The target member may be masked to form the film only in a non-masked region of the target member. Alternatively, a specific region of the target member may be cooled at a temperature precluding the film formation to prevent the film from being formed in the specific region.

Abstract: Disclosed is a method for forming a high-Re-content alloy film, such as a Re-based film containing Re at 98% or more by atomic composition, or an alloy film containing Re in the range of 65 to less than 98% by atomic composition and at least one of Ni, Fe and Co. The method comprises performing an electroplating process using an electroplating bath containing an aqueous solution which includes a perrhenate ion, at least one ion selected from the group consisting of Ni, Fe, Co and Cr ions, and at least one of a Li ion and a Na ion. The present invention allows a high-Re-content alloy film usable as a corrosion-resistant alloy coating for a high-temperature component or the like to be formed through an electroplating process using an aqueous solution, so as to provide heat/corrosion resistances to the component, even if it has a complicated shape, in a simplified manner at a low cost.

Abstract: A diffusion barrier alloy film has a diffusion barrier layer which has more excellent diffusion barrier properties than an Re—Cr alloy film, and can stand usage at higher temperatures (e.g., 1150° C. or higher). The diffusion barrier layer 18 is made of an Re—W alloy ? phase containing 12.5 to 56.5% of. W in terms of atomic composition and the remainder of Re excluding unavoidable impurities. A metal base 10 has a surface coated with a diffusion barrier layer 18. If required, the diffusion barrier layer 18 has a surface coated with a diffusion alloy layer 20 containing 10% or greater and less than 50% of Al, Cr, or Si in terms of atomic composition, providing a high-temperature apparatus member.

Abstract: A composite resistive to high-temperature corrosion and abnormal oxidization, maintains original excellent high-temperature characteristics of Ni alloys over a long period of time, and suitable for applications in a high-temperature such as gas turbines, jet engines, and elements for exhaust-gas systems. A heat-resistant Ni-alloy composite has excellent high-temperature oxidation resistance, including a Ni-alloy substrate that has been subjected to an Al-diffusing treatment. The surface coat has a multi-layer structure including an inner layer composed of an ?-Cr phase and an outer layer composed of a ? phase (Ni—Al—Cr) and a ?? phase (Ni3Al(Cr)) on the substrate surface. The Al content in the outer layer is at least 20 atomic percent. The ?-Cr phase functions as a diffusion-barrier layer. The outer layer retains and secures a high Al content required for self-regeneration of a defective portion of the Al2O3 layer damaged in an operating condition.

Abstract: Disclosed is a method of forming a high-temperature corrosion-resistant film, which comprises placing a container containing a film-forming fine powder and a target member capable of being heated by an electric current heating process, in an atmosphere-controllable treatment chamber, and floating the fine powder and subjecting the target member to the electric current heating process to allow vapor of the fine powder generated by the heating to be diffused into the target member from a surface thereof so as to form a diffusion film layer, and allow the floated fine powder to be attached onto the surface so as to form a fine-powder film layer on the diffusion film layer. The target member may be masked to form the film only in a non-masked region of the target member. Alternatively, a specific region of the target member may be cooled at a temperature precluding the film formation to prevent the film from being formed in the specific region.

Abstract: Disclosed is a Re alloy coating for diffusion barrier, such as a high-temperature equipment member, which comprises an atomic composition of 30% to less than 90% Re; and an atomic composition of 5% to less than 60% X (wherein X is at least one selected from the group consisting of Cr, Mo and W), with the remainder except for inevitable impurities being at least one selected from the group consisting of Ni, Fe and Co. Even if the alloy coating for diffusion barrier includes a diffusion layer containing at least one of the group consisting of Al, Si and Cr, a desired alloy composition of the alloy coating for diffusion barrier can be assured by a surface coating process and diffused components from the substrate while substantially preventing the diffusion of the elements of the diffusion layer during a homogenizing heat treatment. The alloy coating for diffusion barrier may include a Re-containing-alloy stress relief layer inserted between the film and the substrate.

Abstract: Disclosed is a ReCrNi alloy coating for diffusion barrier, such as a high-temperature equipment member, consisting essentially of a ternary alloy and having, except for inevitable impurities, an atomic composition of 20% to 80% Re, an atomic composition of 20% to 60% Cr, and an atomic composition of 5% to 40% Ni. Even if the alloy coating for diffusion barrier includes a diffusion layer containing at least one of the group consisting of Al, Si and Cr, a desired alloy composition of the alloy coating for diffusion barrier can be assured by a surface coating process and diffused components from the substrate while substantially preventing the diffusion of the elements of the diffusion layer during a homogenizing heat treatment. The alloy coating for diffusion barrier may include a Re-containing-alloy stress relief layer inserted between the film and the substrate.

Abstract: Discloses is a metal-based resistance heat-generation element. The element comprises a core made of a platinum group metal or refractory metal, and a coating film formed on the core. The coating film has at least two layers including a core-side inner layer of a Re—Cr based ? (sigma) phase and a surface-side outermost layer of an aluminide or silicide. Alternatively, the element may comprise a core made of an alloy containing a platinum group metal or refractory metal and Re and Cr diffused therein, and a coating film formed on the core. The coating film has at least one layer including an aluminide or silicide layer.

Abstract: Disclosed is a heat-resistant Ti alloy material excellent in high-temperature corrosion resistance and oxidation resistance, which comprises a base made of a heat-resistant Ti alloy and a surface layer formed on the surface of the base. The surface layer has a multilayer structure including an inner layer and an outer layer. The inner layer has three coexistent phases consisting of a ? phase, a ? phase and a Laves phase in the phase diagram of a Ti—Al—Cr based alloy, and the outer layer is made of an Al—Ti—Cr based alloy having an Al concentration of 50 atomic % or more.