A different material welded joint in which a first member made of a first material and a second member made of a second material having a melting point lower than that of the first material are joined to each other by welded parts, wherein the first member has a plurality of through-holes and a filler material made of the second material is filled in the plurality of through-holes, and wherein an interval between the through-holes is made wider and/or an area of the through-hole is made smaller at a welding end-side than at a welding start-side with respect to progress of welding.

The disclosure includes a welding cup system comprising a tube having an open top, an open bottom, a sidewall extending between the open top and the open bottom, and an open channel. The open channel may extend through an interior portion of the tube from the open top to the open bottom. The open top may be arranged and configured to slideably couple to at least a portion of a torch assembly. The open channel may be arranged and configured to allow gas to flow from the open top to the open bottom, and allow a welding electrode to extend through the open channel from open top towards the open bottom. The welding cup system may have a side profile that may define an asymmetrical shape.

A different material welded joint in which a first member made of a first material and a second member made of a second material having a melting point lower than that of the first material are joined to each other by welded parts at a plurality of welding sections, wherein the first member has a plurality of through-holes respectively corresponding to the plurality of welding sections and a filler material made of the second material is filled in the plurality of through-holes, and wherein apexes of welding beads of the welded parts, which are deposited and formed on a surface of the second member facing the through-holes, are formed independently of each other at each of the welding sections.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

A method for joining a first part formed of an aluminum material to a second part formed of a steel material by metal inert gas welding and cold metal transfer is provided. An aluminum filler material forms a fillet joint between the parts and provides a structure for automotive body applications, such an aluminum bumper extrusion joined to a steel crush box connection. The first part includes a notch for hiding the start and end of the joint. A transition plate formed of a mixture of aluminum material and steel material can be disposed between the first part and the second part to provide the notch. The second part can include a mechanical fastener further joining the parts together. In another embodiment, the second part includes a plurality of dimples and is welded to the first part along the dimples.

A method of making an assembly having a cast iron subassembly. The method may include providing a steel insert having a first joining surface and bonding the steel insert to a cast iron part to form a cast iron subassembly such that the first joining surface may be an exterior surface of the cast iron subassembly.

The present invention provides a method for MIG brazing an Al alloy to a steel sheet so as to manufacture a lap joint member that excels in bonding strength with respect to the Al alloy. With the MIG brazing method, a bonding target sheet, specifically, an Al sheet or an Al alloy sheet is bonded to a hot dip Zn-based alloy coated steel sheet (1) whose coating layer contains Al in an amount of 1.0% by mass to 22.0% by mass. A target location of MIG brazing is a region between (i) an intersection (C) of one end of an end surface (6) of the bonding target sheet and the hot dip Zn-based alloy coated steel sheet and (ii) the other end (U) of the end surface of the bonding target sheet.

An additive manufacturing system includes an additive manufacturing tool configured to receive a plurality of metallic anchoring materials and to supply a plurality of droplets to a part, and a controller configured to independently control the composition, formation, and application of each droplet to the plurality of droplets to the part. The plurality of droplets is configured to build up the part. Each droplet of the plurality of droplets includes at least one metallic anchoring material of the plurality of metallic anchoring materials.

A dissimilar-metal joining tool that places a ring-shaped joining auxiliary member made of iron, on a surface of a workpiece in which a second metal plate made of non-ferrous metal is laminated on a first metal plate made of iron, coaxially with a through-hole penetrates the second metal plate, and that performs arc welding toward an inner hole of the joining auxiliary member, the dissimilar-metal joining tool includes a base attached to a distal end of a robot; an arc welding torch attached to the base; a positioning mechanism provided in the base, and places the inner hole at a joining position in the arc welding torch and holds the joining auxiliary member in a radially-positioned state; and a pressing mechanism presses the joining auxiliary member in the vicinity of an outer peripheral edge.

Structure including joint structure of dissimilar materials comprises a roof panel and a skeletal body. The roof panel has a bent portion at its end and is a panel member made of an aluminum alloy. The skeletal body has a support portion for supporting the first member and is made of steel. The roof panel and the skeletal body are joined by continuous welding of a vicinity of an apex of the bent portion of the roof panel and the support portion of the skeletal body, a reinforcing plate is joined to the roof panel at least partially along the joining portion with the skeletal body.