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Cold Metal Transfer (CMT) - a new process of joining technology


the abbreviation "CMT" stands for "cold metal transfer", meaning a cutting-edge process of gas shielded arc welding with a few special features. The wire movement is directly integrated in the regulation of the process. The welding wire is moving backwards and forwards up to 90 times per second. The pulling back of the wire during the short circuit supports the drip replacement. The heat input is happening only during the firing stage and therefore kept at a low level.

the CMT welding technique differs from traditional welding techniques through a series of characteristics.

f.e. short arc with a new method drip replacement
f.e. oscillating movement of the welding wire for controlling the drip transition
f.e. welding torsion below transition arc
f.e. low capacity and heat input
z.B. high requirements onto the regulation of process

therefore a series of new characteristics developed and methods of usage for products, materials and combination of materials can be made.

f.e. welding of thin sheet between 0,3 bis 3,0 mm
f.e. joining of dissimilar materials like steel and aluminium
f.e. drop absence




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Center of competence: Fronius AG (www.fronius.com)

Contact person:

Walter Stieglbauer
phone: 07242 241 8020
e-mail: Stieglbauer.Walter@fronius.com