A review on the characteristics and different types of CMT welding process variant

Absztrakt

Some welding tasks can be difficult to solve with conventional arc welding processes, due to the applied high heat input, thus the different welding machine manufacturers have developed different processes and process variants. One such development was the CMT (cold metal transfer) process variant. The process is based on a short-circuit version of gas metal arc welding (GMAW) process, but the main difference is, that during the CMT process, the droplet deposition is controlled by the retraction of the wire, which also has the advantage of providing a joint with almost no spatter. Subsequently, several different process variants of the CMT have appeared in recent years, which have other beneficial properties. Therefore, the aim of this paper is to summarize the CMT process variants and the different types of them and their potential applications.