ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
A newly developed freeform fabrication process named 3D Micro-Welding, which is acombined system of a micro-TIG welding and a layered manufacturing method, is demonstrated.Various refractory alloys such as Inconel, stainless steel, and Invar can be freeformed besideselemental metals like titanium. Small metal beads of ~1mm in diameter are formed by emittingmicro arc to the top of a thin metal wire of 0.2mm diameter. A fused bead is welded to a metalsubstrate or previously formed beads. By continuing this process and building up beads layer bylayer under the control of CAD/CAM system, 3D objects were produced. In this study, optimizationof micro-welding parameters such as the waveform of pulsed arc current and electrode materialswere investigated and simple 3D objects of Inconel 600, SUS 304, Invar 42 were formed. Theinterfaces between adjacent beads were joined well and no crack or pore existed in the formedobjects. The density and Vickers hardness of Inconel 600 objects showed comparable values to thecommercial Inconel alloy, however the yield strength and Young’s modulus was about 80% and70% of that alloy, respectively
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.127.189.pdf
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