The present invention discloses a pressure-welded tool, wherein the method for manufacturing pressure-welded tool includes: heating a first joining surface of a first metal part carrying a tool head to a temperature above the recrystallization temperature of the first metal part; heating a second joining surface of a second metal part to a temperature above the recrystallization temperature of the second metal part; and end-to-end pressure welding together the heated first joining surface and the heated second joining surface until the temperatures of the first joining surface and the second joining surface cool down to below their respective recrystallization temperatures; accordingly a tool is manufactured using the above method.

A bonding method for bonding two substrates (W1, W2) includes: a heat treatment process of heating a bonding surface to be bonded to each other of each of the two substrates (W1, W2) to a temperature higher than 60 C. in a reduced-pressure atmosphere; an activation treatment process of activating the bonding surface of each of the two substrates (W1, W2) in a state of maintaining the reduced-pressure atmosphere after the heat treatment process; and a bonding process of bonding the two substrates (W1, W2) in a state of maintaining the reduced-pressure atmosphere after the activation treatment process. In the heat treatment process, the state of heating the bonding surface of each of the two substrates (W1, W2) to a temperature higher than 60 C. may be maintained for 30 seconds or more in a state of maintaining the reduced-pressure atmosphere. The gas pressure in the heat treatment process may be 10.sup.2 Pa or less.

A bonded body is provided that is formed by bonding a metal member formed from copper, nickel, or silver, and an aluminum alloy member formed from an aluminum alloy of which a solidus temperature is lower than a eutectic temperature of aluminum and a metal element that constitutes the metal member. The aluminum alloy member and the metal member are subjected to solid-phase diffusion bonding. A chill layer, in which a Si phase of which an aspect ratio of a crystal grain is 2.5 or less and a crystal grain diameter is 15 m or less is dispersed, is formed on a bonding interface side with the metal member in the aluminum alloy member. The thickness of the chill layer is set to 50 m or greater.

The present invention discloses laser pressure welding which is used for joining a first metal component with a second metal component; the first metal component has a first joining section with a first joining surface; the second metal component has a second joining section with a second joining surface; laser beams are projected onto the first and second joining sections of the first and second metal components to heat the first and second joining surfaces to a temperature between their re-crystallization temperature and melting temperature respectively; and the first joining surface of the first metal component is pressed tightly against the second joining surface of the second metal component until the first joining and second joining surfaces are cooled to a temperature below their re-crystallization temperature.

Disclosed is a method for an all-laser hybrid additive manufacturing. After a matrix is obtained by means of selective laser melting forming, a subtractive forming is carried out on the matrix by means of a pulse laser to form a cavity, and the cavity is then packaged to obtain a forming material with an internal cavity structure. A laser precision packaging method is used in the method based on the melting of the laser selective region. Also disclosed is the apparatus, comprising a laser unit (2), a control unit (4) and a forming unit (6). The laser unit is in light path connection with the forming unit, and the control unit is electrically connected with the laser unit and the forming unit respectively. The laser unit comprises a first laser light source to and a second laser light source. The forming unit comprises a welding unit (68), and the welding unit is controlled by the control unit and is matched with the laser unit for the additive manufacturing.

A pre-sintered preform (114) and a repair process (100) utilizing the pre-sintered preform (114) are disclosed, each of which result in a brazement (116) comprising a replacement protective coating (118) deposited on a component surface (110). The protective coating (118) exhibits excellent temperature and oxidation resistance, improved adhesion to superalloy surfaces, and reduced depletion over a service life of the associated component (102).

A method of forming a fused rail assembly in which one or more heating elements are positioned in a gap between first and second end faces of aligned first and second rails. The end faces are covered by a non-oxidizing atmosphere, and the heating elements are energized, to heat portions of the first and second rails to a predetermined hot working temperature. While one or more of the first end faces is moving transversely relative to center lines of the rails, and while the heated portions are at the predetermined hot working temperature, the first and second end faces are engaged with each other, to fuse together, forming the fused rail assembly. The transverse motion of the first end face or the second end face or both may commence before or after the first and second end faces are engaged.

A manifold assembly for an automobile cooling system includes a crossover tube and a crossover tube cover welded in an opening of the crossover tube A flash trap is provided adjacent the region of the weld joint to receive and capture weld flash migrating inwardly in the crossover tube.

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.

A bonded body is provided that is formed by bonding a metal member formed from copper, nickel, or silver, and an aluminum alloy member formed from an aluminum alloy of which a solidus temperature is lower than a eutectic temperature of aluminum and a metal element that constitutes the metal member. The aluminum alloy member and the metal member are subjected to solid-phase diffusion bonding. A chill layer, in which a Si phase of which an aspect ratio of a crystal grain is 2.5 or less and a crystal grain diameter is 15 m or less is dispersed, is formed on a bonding interface side with the metal member in the aluminum alloy member. The thickness of the chill layer is set to 50 m or greater.