View Material Loss During CMT process with Extreme Details

CMT (Cold Metal Transfer) is a modified GMAW process in that it retracts the wire when detecting a short this enables cooling of the weld before the next drop which results in smoother and stronger weld.

In this set-up: wire and torch diameter is 21.1 mm while the wire diameter is 1.2 mm thick. The protection gas used was Argon 68%, Helium 30%, CO2 2%.

In this test the wire feeding speed was 13,5 cm/s. The material used here is S355 Steel and the filler material is Ni-based flux-cored Spherical Fused Tungsten Carbide (SFTC). The wire has a solid metal outer surface and powder on the inside which provides a special ability that is hardening the metal. While all of the powder should go to the melt pool, due to bad parameters we get to see a lot of material is lost and wasted.

By having this clear view of the welding process, you can easily identify what happens when you use the wrong parameters, and this can save you lots of resources including time, money and material.

We used Phantom Camera V2640 together with our #CAVILUX laser illumination and Schlieren imaging technique, and recorded at a frame rate of 12,000 fps with a resolution of 1920 x 1080 pixels played back at 10 frames per second.

Video was taken in cooperation with LAL - Laser Application Laboratory of Tampere University (former Tampere University of Technology).

Used camera: Phantom v2640 provided by Citius Imaging Ltd.

Read more about CAVILUX laser illumination: http://bit.ly/CAVILUX_laser_illumination

Read more about Schlieren imaging: http://bit.ly/schlieren_imaging

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#welding #metal3Dprinting #CMT #CAVILUX