Both processes have their own advantages, but they also work well together – and future developments may lead to more efficient applications. Laser cladding and laser welding are different processes, but they serve a similar need: joining materials. Each has some features and benefits, and in some cases, professionals can use them all simultaneously. Let’s take a look at what each process is and what it offers. What is laser cladding? —Laser cladding, also known as “laser deposition,” involves the use of filler materials to create a metallurgical bond between a metal substrate and a metal coating. The filler material usually arrives in powder, ribbon, or wire form and is introduced coaxially or transversely to the heat of the laser. By using multiple powder types and adjusting the feed rate for each powder, it is possible to create components deposited with multiple materials, even components with material gradients.

Laser cladding plays a role in a wide range of industrial tasks – including applying surface coatings, and rapidly manufacturing and repairing worn parts. CO2, Nd: YAG (Neodymium-doped Yttrium Aluminum Garnet), and fiber lasers are the three lasers used in this process and are used for several reasons:

• Low risk of separation and delamination due to metallurgical bonding.
• Laser cladding supports a variety of material selections, both for substrates and deposition materials.
• The porosity using this method is limited.
• Laser cladding is also well-suited for automation and integration into CNC operations and CAD-based processes.

Deposition material options include ferrous metals such as stainless and carbon steel, as well as cobalt- and nickel-based alloys, as well as aluminum, Inconel, and titanium alloys. Compared with traditional cladding and welding techniques, laser cladding provides a high-speed thermal cycle that allows for higher hardness and finer microstructure – two properties that help resist corrosion. Laser cladding also offers the benefit of a limited heat-affected zone, which has many advantages: it reduces the amount of trauma to the part or workpiece, reduces the potential for deformation, and allows the process to proceed with other critical areas that are less heat-resistant, Includes adjacent edges and walls. This means laser cladding can add structural reinforcement to sensitive areas.

Like laser cladding, laser welding also produces a small heat-affected zone and minimal thermal deformation. Other advantages include high productivity and high-speed operation. Because the laser provides a concentrated source of heat, the joint between the two materials quickly melts and fuses, then cools. This makes material selection a critical decision for manufacturers, as these materials must be able to withstand rapid cooling without cracking. Cladding and Welding Together – There are some significant differences between laser welding and laser cladding. They both join two materials, but laser cladding essentially creates a new surface by coating the base material with another metal. At the same time, laser welding fuses the two workpieces. However, in some cases, the two can work together. One example of combining the two involves the use of “exotic” metallurgical techniques. Some austenitic steel grades and nickel alloys are “exotic” and desirable because they can withstand corrosion in harsh environments. Welding exotic materials that do not occur naturally can be difficult, but using both welding and cladding can help achieve the best of both worlds. Laser welding can join two traditional materials valued for their structural properties, while laser cladding can strategically deposit more specialized materials valuable for their surface properties at critical joints or areas with high wear.