Technics research of hybrid laser-TIG welding of 316L stainless steel

YAN Jun; ZENG Xiao-yan; GAO Ming; DENG Ye-ping

A serious experiment of CO2 laser-tungsten inert gas(TIG) arc hybrid welding was used to weld the 316L stainless steel with Rofin Sinar 5kW CO2 laser and Miller TIG welding machine.The effect of various parameters such as laser power,arc current and the laser-arc distance on the welding shape was studied in detail.The result showed that there was a "key hole" when the laser power was above 2.5kW,which dominantly affected the weld penetration;the weld width was relative to the power of the laser and energy of the arc when the arc current was less than 150A,but the weld width was determined by the energy of the arc only when the arc current was larger than 150A.There was an optimal laser-arc distance(2mm~3mm),with which the weld penetration can be improved to 1.46 times~2.54 times.The research shows that the hybrid welding can improve the weld ability of 316L stainless steel.

Corresponding author: ZENG Xiao-yan, xyzeng@mail.hust.edu.cn;

1. National Engineering Research Center for Laser Processing, Huazhong University of Science and Technology, Wuhan 430074, China;

2. Angle Yeast Co.Ltd., Yichang 443003, China

Received Date: 2006-07-07

Accepted Date: 2006-09-26

Available Online: 2007-10-25

Abstract: A serious experiment of CO2 laser-tungsten inert gas(TIG) arc hybrid welding was used to weld the 316L stainless steel with Rofin Sinar 5kW CO2 laser and Miller TIG welding machine.The effect of various parameters such as laser power,arc current and the laser-arc distance on the welding shape was studied in detail.The result showed that there was a "key hole" when the laser power was above 2.5kW,which dominantly affected the weld penetration;the weld width was relative to the power of the laser and energy of the arc when the arc current was less than 150A,but the weld width was determined by the energy of the arc only when the arc current was larger than 150A.There was an optimal laser-arc distance(2mm~3mm),with which the weld penetration can be improved to 1.46 times~2.54 times.The research shows that the hybrid welding can improve the weld ability of 316L stainless steel.

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Reference (10)

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Technics research of hybrid laser-TIG welding of 316L stainless steel

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References

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