Microstructure and property of rotary double-focus laser-TIG hybrid welding of 304# stainless steel

WEN Yang; WANG Su; LI Xiao-hui

doi:10.3969/j.issn.1001-3806.2009.06.010

LASER TECHNOLOGY > 2009 > 33(6): 593-596. > DOI: 10.3969/j.issn.1001-3806.2009.06.010

WEN Yang, WANG Su, LI Xiao-hui. Microstructure and property of rotary double-focus laser-TIG hybrid welding of 304# stainless steel[J]. LASER TECHNOLOGY, 2009, 33(6): 593-596. DOI: 10.3969/j.issn.1001-3806.2009.06.010

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Microstructure and property of rotary double-focus laser-TIG hybrid welding of 304# stainless steel

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Received Date: September 10, 2008
Revised Date: November 09, 2008
Published Date: December 24, 2009

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Abstract

In order to improve the property of stainless steel welding,a rotary double-focus laser-tungsten inert gas (TIG) hybrid welding technique was proposed,in which the rotary double-laser beam and the TIG arc were applied in welding at the same time.The rotary double-focus laser-TIG hybrid welding torch was designed,and a detailed experiment of rotary double-focus laser-TIG hybrid welding on the 304# stainless steel plate with different welding parameters was carried out.The results showed that the hybrid function between the double-focus laser and arc was the main factors affecting the microstructure of welded joint,and that the rotation frequency affected the mierostructure and micro-hardness of welded joint,the lower the rotary frequency,the higher the hardness because of smaller microstructure induced by re-melting of the welding line.The results are applicable in theoretical analysis and experimental research of laser-TIG hybrid welding technique.
- laser technique,
- laser welding,
- rotary double-focus laser-tungsten inert gas,
- stainless steel,
- microstructure

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