Provided are a simple and effective friction welding method that can suppress increases in hardness of the welded part and reductions in hardness (strength) in the heat affected zone regardless of the composition of ferrous material, and a welded structure obtained with the same. The present invention relates to a friction welding method wherein surfaces to be welded of two metal members (2, 4) to be welded are made to slide in contact with each other. The friction welding method is characterized in that at least one of the metal members (2, 4) to be welded is a ferrous material, and the maximum temperature reached during welding is equal to or less than the A.sub.3 point or equal to or less than the A.sub.cm point of the ferrous material. The maximum temperature reached during welding is preferably equal to or less than the A1 point of the ferrous material.

A pulley assembly having a body, a shaft mount and a plurality of bolts is disclosed. The body is aligned to the shaft mount by providing a tight tolerance between a shoulder portion of the bolt and a neck portion of a counter sunk hole formed in the body. Additionally, an outer surface of the body may have a pattern of friction lines or patches formed by fusing particulate matter to the outer surface with heat generated by a laser beam.

A method for bonding a cemented (or sintered) carbide element to a structural component is provided comprising cladding at least one surface of the cemented (or sintered) carbide element with a metal alloy using diffusion bonding or brazing and friction welding a cladded surface of the cemented (or sintered) carbide element to the structural component.

A silver brazing material containing silver, copper, zinc, manganese, nickel, and tin as indispensable constituent elements. The silver brazing material includes 35 mass % or more and 45 mass % or less silver, 18 mass % or more and 28 mass % or less zinc, 2 mass % or more and 6 mass % or less manganese, 1.5 mass % or more and 6 mass % or less nickel, and 0.5 mass % or more and 5 mass % or less tin, with the balance being copper impurities. Within these compositional ranges, a predetermined relation is set between the manganese content and the nickel content, whereby the silver brazing material can be provided with excellent characteristics also in terms of processability or wettability. In the silver brazing material of the present invention, the silver content is reduced, and also melting point reduction and the narrowing of the temperature difference between solidus temperature and liquidus temperature are attempted.

A method of forming a stamped part includes forming a tailor welded blank by friction stir welding (FSW) a first blank to a second blank, removing a FSW start spot and a FSW stop spot from the tailor welded blank using a machining process such that a finished tailor welded blank is formed and stamping the finished tailor welded blank into the stamped part such that a weld formed by FSW the first blank to the second blank is plastically deformed. The first blank and the second blank can be aluminum alloy blanks and a predetermined amount of material is machined from the FSW start spot and the FSW stop spot, the predetermined amount of material being equal to or greater than a thickness of the first blank and the second blank.

The invention relates to an expansion clamping device having a main body (2) and an expansion sleeve (5) which is inserted into the main body (2) or surrounds the body, forming a pressure chamber (8), the pressure chamber (8) being capable of being acted upon by a hydraulic medium with resilient deformation of the expansion sleeve (5). The expansion sleeve (5) is integrally fixed to the main body (2) at the front axial end region (16) and/or at the rear axial end region (17) of the pressure chamber (8) via a friction-welded connection (14).

There is provided a method of forming cutting blades using selective laser melting comprising positioning a first part of an elongate strip (30) with pre-formed teeth (32) within a powder bed (20), forming coating layers layer-by-layer to create a cutting surface on each pre-formed tooth by repeatedly depositing a layer of powder on the powder bed and scanning a laser beam over the deposited powder to fuse powder to the pre-formed teeth.

A metal hand tool including a handle attached to a blade piece and method of construction. The blade piece includes a blade opposite an elongated tang. The handle is made up of two, welded, symmetrical handle halves, each handle half having an opening for receiving a hang hole piece and a notched distal end for forming a handle opening to receive the blade piece elongated tang. In an embodiment, the handle includes a curved distal end accommodating a curved welded connection between the blade piece and the handle. The hand tool further includes a hang hole piece configured for placement through the hang hole openings in the handle and for welded connection to the handle. In an embodiment, the elongated tang includes a hang hole opening through which the hang hole extends. Some embodiments further include one or more tang guide pieces welded to the interior of the handle.

A method for manufacturing a hot rolling mill roll by laser cladding a reusable steel axe substrate having a rotational symmetry axis with a metal coating external layer, the metal coating external layer having a work tool steel composition, the method including: rotating the reusable substrate around the rotational symmetry axis; effecting a laser cladding on the rotating substrate by forming a melt pool on a surface of the rotating substrate by a laser beam as a laser-induced melt pool and affixing the coating layer by feeding a powder material into the laser-induced melt pool to form a coated substrate; and submitting the coated substrate to a post-cladding thermal treatment. The composition for the metal coating external layer is 0.5-3.5% C, 2-18% Cr, 0.5-7% Mo, 0.5-8% V, 0.2-7% W, 0-5% Nb, 0-1% Ti, 0.5-2% Mn, 0.2-3% Si, and 0-3% Ni, a remainder being Fe and inevitable impurities.

A mount system and method of manufacture for e.g. a machine vision camera is disclosed. The mount system comprises a rectangular base, a lower clamp disc, an upper clamp disc, a tilting plate, an expansion clamp, and an O-ring. The expansion clamp comprises a tapered head screw and an expandable mandrel, both typically made of stainless steel. The mount system facilitates improved machine vision by enabling effective mounting of machine vision cameras in smaller spaces and/or spaces requiring unusual angles and intricate positioning. The mount system is also advantageous in inhospitable environments having harsh environmental factors. The mount system is also easier for machine vision personnel to learn and understand.