A laser welding method of the present disclosure includes the step of irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece. The helical shape is a combination of a circular trajectory in which a laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part. Furthermore, first energy of the laser beam moving so as to have a component of the proceeding direction in the circular trajectory is larger than second energy of the laser beam moving so as to have a component of an opposite direction to the proceeding direction in the circular trajectory.

Laser welding method

A method and system to manufacture workpieces employing a high intensity energy source to create a puddle and at least one resistively heated wire which is heated to at or near its melting temperature and deposited into the puddle as droplets.

Method and system for additive manufacturing using high energy source and hot-wire

Liquid lubricants are extremely viable in reducing wear damage and friction of mating components. However, due to the relentless pressure and the recent trend towards higher operating environments in advanced automotive and aerospace turbo-machineries, these lubricants cease to perform and hence, an alternate system is required for maintaining the self-lubricating environment. From the viewpoint of tribologist, wear is related to near-surface regions and hence, surface coatings are considered suitable for improving the functioning of tribo-pairs. Wear resistant coatings can be fabricated with the addition of various solid lubricants so as to reduce friction drag. In order to protect bulk substrates, self-lubricating wear resistant composite coatings have been fabricated by employing various surface coating techniques such as electrochemical process, physical and chemical vapor depositions, thermal and plasma spraying, laser cladding etc. Studies related to laser-based surface engineering approaches have remained vibrant and are recognized in altering the near surface regions. In this work, the latest developments in laser based self-lubricating composite coatings are highlighted. Furthermore, the effect of additives, laser processing parameters and their corresponding influence on mechanical and tribological performance is briefly reviewed.

A Review to the Laser Cladding of Self-Lubricating Composite Coatings

The present disclosure relates to new metal powders for use in additive manufacturing, and aluminum alloy products made from such metal powders via additive manufacturing The composition(s) and/or physical properties of the metal powders may be tailored In turn, additive manufacturing may be used to produce a tailored aluminum alloy product

Aluminum alloy products, and methods of making the same

A welded blank assembly (200) includes a capping material (210) in a weld region (220) of the assembly. The capping material can help protect a weld joint (208) joining first and second sheet metal pieces (12, 112) together. At least one of the sheet metal pieces has a coating material layer (18) that is removed prior to forming the weld joint so that the coating material does not contaminate the weld joint. The removed coating material can be collected before the weld joint is formed and reapplied as part of the capping material after the weld joint is formed, effectively changing the coating material from a potential weld contaminant to a weld joint protectant. The capping material may also include additional material from a source other than the coating material layer.

Welded blank assembly and method

A filler wire (consumable) (140, 140A, 140C, 240) for depositing wear-resistant materials (142) in a system (100, 1400) for any of brazing, cladding, building up, filling, hard-facing overlaying, welding, and joining applications is provided. The consumable (140, 140A, 140C, 240) is composed of base filler materials (141) consistent with commonly known compositions. For example, the base filler material (141) can comprise standard materials used in many standard mild steel wires. In addition to the base filler materials, the consumable includes wear-resistant materials (142). The wear-resistant materials (142) include at least one of amorphous metallic powder, diamond crystals (142), diamond powder (143), tungsten carbide, and alu- minides.

Hot-wire consumable to provide weld with increased wear resistance

Embodiments of the invention relate to consumables that are used with non-arc deposition processes, including hot-wire deposition processes. Exemplary embodiments of the present invention eliminate the use of arc initiators or arc stabilizers in the consumable. Other embodiments add additional amounts of carbonates in the consumable than would otherwise be present in consumables for arc welding processes. Similarly, other exemplary embodiments of the present invention include additional amounts of nitrides than would otherwise be present in arc process consumables. Other exemplary embodiments include carbides that are desired to be deposited through the non-arc processes.

Cored non-arc consumable for joining or overlaying and systems and methods for using cored non-arc consumables

A method of and system for welding or joining workpieces (115) employing an arc generating power supply (2130) to create a weld puddle and at least one resistive filler wire (140) which is heated to at or near its melting temperature and deposited into the weld puddle.

Method of and system for starting and useing in combination a filler wire feed and arc generating source for welding

A filler wire (consumable) for depositing self-lubricating materials in a system for any of brazing, cladding, building up, filling, hard-facing overlaying, welding, and joining applications. The filler wire is composed of a base filler material consistent with commonly known compositions. For example, the base filler material can comprise standard materials used in many standard mild steel wires. In addition to the base filler materials, the consumable includes self-lubricating materials. The self-lubricating materials include at least one of graphite particles and graphite powder, and can include other self-lubricating materials.

Michael Whitehead

Papers

Method and system for additive manufacturing using high energy source and hot-wire

Hot-wire consumable to provide weld with increased wear resistance

Cored non-arc consumable for joining or overlaying and systems and methods for using cored non-arc consumables

Method of and system for starting and useing in combination a filler wire feed and arc generating source for welding

Hot-wire consumable to provide self-lubricating weld or clad