The present disclosure is directed to a multi-segment device, such as an intravascular guide wire. The multi-segment device includes an elongate first portion comprising a first metallic material, an elongate second portion comprising a different metallic material, the first and second elongate portions being directly joined together end to end by a solid-state weld, and a heat affected zone surrounding an interface of the weld where the first and second portions are joined together, wherein the heat affected zone has an average thickness of less than about 0.20 mm.

A welding system for welding a first elongated element and a second elongated element together by a laser beam that is emitted from a laser welding head after the ideal welding center point of the aligned first and second elongated elements has been positioned at a focal point of the laser beam that is emitted from the laser welding head.

A Ni-based alloy core wire for a covered electrode according to an aspect of the invention includes, as a chemical composition, by mass %: C: 0.0100% to 0.0800%; Si: 0.010% to 0.800%; Mn: 0.010% to 1.800%; Mo: 15.0% to 28.0%; W: 2.5% to 8.0%; Cu: 0.10% to 1.20%; Ta: 0.002% to 0.120%; Ni: 65.0% to 82.3%; and a remainder: impurities with other optional selective elements; in which a value X is 0.010% to 0.160%.

A brazing material outer coat and a method for preparing the same, an in-situ synthetic metal-coated flux-cored silver brazing material and a method for preparing the same, a welding method and a joint body, wherein the in-situ synthetic metal-coated flux-cored silver brazing material comprises a flux core and a brazing material outer coat wrapping the flux core, the brazing material outer coat comprises, in percentage by weight: silver Ag 20.036.0%, copper Cu 35.045.0%, zinc Zn 27.037.0%, tin Sn 1.03.0%, phosphorus P 0.1%0.5%, nickel Ni 0.52.0%, germanium Ge 0.10.3%, and lithium Li 0.10.3%, the flux core comprises, in percentage by weight: elemental boron micropowder 5.010.0%, sodium borohydride 5.010.0%, potassium fluoroborate 15.030.0%, boric anhydride 25.040.0%, sodium fluoride 10.030.0%, sodium bifluoride 2.04.0%, and copper sulfate 1.05.0%. The in-situ synthetic metal-coated flux-cored silver brazing material in the present disclosure realizes self-reaction in a brazing process to coat a layer of copper film on a surface of a brazed metal, the core of the brazing material has good wettability, good flowability, self-brazing function, and zinc being hard to volatilize, the flux coat has high activity, low hygroscopicity, few carbon residues, good plasticity and toughness, etc. The present disclosure is particularly suitable for brazing pipeline components of stainless steel, manganese brass and so on.

Disclosed are a method and a system for tin immersion and soldering of a core wire which includes: inserting a core wire row into molten tin vertically; moving the each core wire in the molten tin along a direction perpendicular to the core wire row to remove carbonized matter from each core wire on a moving direction side; pulling the each core wire out of the molten tin; and performing alignment, such that the inner core conductor of the each core wire on the moving direction side contacts with a bonding pad. According to the technical solution of the present disclosure, the carbonized matter on the core wire that aligned facing the bonding pad is removed, such that the temperature transfer effect of the automatic soldering is improved, the yield of the automatic soldering is improved, and the consistency and the yield of the automatic soldering are more stable.

A method for end rounding bristles of a brush section includes providing a focused laser beam propagating along a geometrical main propagation direction and having a main irradiation spot, providing a relative motion between an end of each bristle and the main irradiation spot of the focused laser beam such that the end of each bristle is moved through the main irradiation spot in a path having a main component transverse to a longitudinal extension of the bristle, wherein the focused laser beam is directed such that the geometrical main propagation direction has a main component transverse to the longitudinal extension of respective bristle having its end at the main irradiation spot, whereby a rounding of the end is provided by the focused laser beam heating the end and causing it to partly melt and form a rounded end, and providing a relative motion between the main irradiation spot and the brush section along a direction having a main component being transverse to the path, thereby subjecting in sequence the ends of the plurality of bristles to the focused laser beam thereby providing a brush section having end rounded bristles. The disclosure also relates to an apparatus.

A wire welding and grinding station (100) comprises a wire welder (112), an AC electrical motor (114) for powering a metal grinder (116), and an AC power supply (110) for supplying electrical power to both the wire welder (112) and the electrical AC motor (114). The station (100) further comprises a soft start module (118) to reduce inrush current demanded by the electrical AC motor (114) while starting. The use of the soft start module (118) allows using a battery (102) as power supply and the use of a battery as power supply has the advantage of practical movability and stable welding currents.

A terminal assembly comprises a conductor including a base metal, a terminal element including copper, and a weld seam at which the terminal element is welded to the conductor. The weld seam has a layer including a copper alloy or of a mixture including copper and at least one base metal.

The present disclosure is directed to a multi-segment device, such as an intravascular guide wire. The multi-segment device includes an elongate first portion comprising a first metallic material, an elongate second portion comprising a different metallic material, the first and second elongate portions being directly joined together end to end by a solid-state weld, and a heat affected zone surrounding an interface of the weld where the first and second portions are joined together, wherein the heat affected zone has an average thickness of less than about 0.20 mm.

Provided is a laser welding method for flat wires in which side surfaces at ends of first and second flat wires coated with insulating films, the side surfaces being stripped of the insulating films, are butted together, and a laser beam is applied to end surfaces of the first and second flat wires to weld together the side surfaces. This method includes: applying the laser beam in a loop shape inside the end surface of the first flat wire to form a molten pool; and gradually increasing the diameter of a loop-shaped application trajectory of the laser beam inside the end surface of the first flat wire to allow the molten pool to reach the side surfaces.