A joining method includes placing a brazing element between an interface area of a first ceramic piece and an interface area of a second ceramic piece to create a joining pre-assembly and placing the components of said joining pre-assembly into a process chamber. Oxygen is removed from said process chamber and at least said brazing element of said joining pre-assembly is heated, thereby hermetically joining said first ceramic piece to said second ceramic piece. Said brazing element consists of Cobalt and Carbon.

In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

The present disclosure provides an electric iron (1) and a soldering device. By providing a first gas conveying device (15, 18) on a housing (11) of the electric iron (1) and providing a second gas conveying device (16, 19) connected to the first gas conveying device (15, 18) on a handle (12), it is possible to utilize negative pressure within the first gas conveying device (15, 18) and the second gas conveying device (16, 19) to suck in the smog produced during soldering at an end of the first gas conveying device (15, 18) far away from the second gas conveying device (16, 19), and to discharge the smog from the second gas conveying device (16, 19).

A wire-feeding electromagnetic spray additive manufacturing device and method are provided. The device includes a housing, an alternating current power box is fixedly installed on the housing, and a stirring needle is also arranged in the housing. The device further includes a fixed seat fixedly installed in the housing, and a heating coil is arranged between the fixed seat and the stirring needle; a lower end of the stirring needle is provided with spinnerets and heating channels adapted with corresponding the spinnerets respectively; upper ends of the heating channels penetrate through the stirring needle and are fixedly connected with the housing, and an extrusion assembly is fixedly installed on each of the heating channels; and a smoke pipe is fixedly installed on the extrusion assembly, and an upper end of the smoke pipe penetrates through the housing and is connected with a negative pressure fan.

A wire-feeding electromagnetic spray additive manufacturing device and method are provided. The device includes a housing, an alternating current power box is fixedly installed on the housing, and a stirring needle is also arranged in the housing. The device further includes a fixed seat fixedly installed in the housing, and a heating coil is arranged between the fixed seat and the stirring needle; a lower end of the stirring needle is provided with spinnerets and heating channels adapted with corresponding the spinnerets respectively; upper ends of the heating channels penetrate through the stirring needle and are fixedly connected with the housing, and an extrusion assembly is fixedly installed on each of the heating channels; and a smoke pipe is fixedly installed on the extrusion assembly, and an upper end of the smoke pipe penetrates through the housing and is connected with a negative pressure fan.

Hybrid bonded turbine rotors and methods for manufacturing the same are provided. A method for manufacturing a hybrid bonded turbine rotor comprises the steps of providing turbine disk having a rim portion comprising a live rim of circumferentially continuous material and a plurality of live rim notches in an outer periphery of the turbine disk alternating with a plurality of raised blade attachment surfaces defining the outer periphery; providing a plurality of turbine blades, each of which comprising an airfoil portion and a shank portion, the shank portion having a base surface; metallurgically bonding a compliant alloy material layer to either or both of the raised blade attachments surfaces of the turbine disk and the base surfaces of the blade shanks; and linear friction welding the plurality of blades to the turbine disk so as to form a bond plane between the raised blade attachments surfaces of the turbine disk and the base surfaces of the blade shanks, the compliant alloy material layer being disposed at the bond plane.

In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

A constructing-and-forging method for preparing homogenized forged pieces comprises: preparing preformed billets: cutting off a plurality of continuous casting billets, milling and smoothing surfaces of the billets to be welded, performing vacuum plasma cleaning operation to the surfaces to be welded, stacking the plurality of billets and sealing around the surfaces in a vacuum chamber by electron beam welding; forge-welding and homogenizing the preformed billets: heating the preformed billets to a certain temperature in a heating furnace and taking the heated preformed billets out of the heating furnace, forging the preformed billets by a hydraulic press, then using three-dimensional forging to disperse the welded surfaces such that composition, structure and inclusion of the interface areas are at the same level as those of the bodies of the billets. Cheap continuous casting billets are stacked and forge welded.

Aluminum alloy material containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mm.sup.2 or more to 710.sup.5 pcs/mm.sup.2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 m are present in a cross-section of the aluminum alloy material, while 100 pcs/mm.sup.2 or more to 710.sup.5 pcs/mm.sup.2 or less of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.

In some implementations, an apparatus includes a curved portion of a storage tank having an exterior surface, having an interior surface and having a defect, the apparatus also includes a steel patch positioned over the curved portion of a storage tank, a plurality of studs and nuts positioned near an outer perimeter of the steel patch, in which the plurality of studs being friction welded to the exterior surface of the curved portion of a storage tank.