Laser Welding Characteristics of Cold Rolled Carbon Steel Utilize Continuous Wave Nd:YAG Laser

2007 ◽  
Vol 345-346 ◽  
pp. 1461-1464 ◽  
Author(s):  
Byung Heon Shin ◽  
Young Tae Yoo ◽  
Ho Jun Shin ◽  
Ji Hwan Kim
Keyword(s):  
Carbon Steel ◽  
Laser Welding ◽  
Nd:Yag Laser ◽  
Laser Power ◽  
Continuous Wave ◽  
Welding Process ◽  
High Energy ◽  
Optimum Conditions ◽  
Cold Rolled ◽  
Laser Welding Process

Laser welding process is widely used in the industrial area due to its less affects to base metal than general welding. Laser welding has characteristics that highly affect ratio, deeply penetration depth and small heat affected zone(HAZ) due to its in a short time melting and then solidification by a high energy absorption rate. The objective of this research work is to investigate the optimum conditions of a cold rolled carbon steel(SCP1) in a laser welding process using a Nd:YAG laser with a continuous wave(CW). The determination of optimum conditions were performed to change the laser power, beam speed, focus length and then carry out an butt welding. From the results of the investigation, it has been shown that the optimal welding condition without defects in the vicinity of the welded area and with a good welding quality is 1325W of the laser power, 1.4m/min of laser welding speed and 0mm of focus position.

Welding characteristics of S45C medium carbon steel in laser welding process using a high power CW Nd:YAG laser

2004 ◽  
Vol 39 (19) ◽  
pp. 6117-6119 ◽  
Author(s):  
Young-Tae Yoo ◽  
Dong-Gyu Ahn ◽  
Kung-Bo Ro ◽  
Seong-Wook Song ◽  
Ho-Jun Shin ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Laser Welding ◽  
High Power ◽  
Nd:Yag Laser ◽  
Welding Process ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Laser Welding Process

Optimization of Nd:YAG-Laser Welding Process for Inconel 718 Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 1305-1308 ◽  
Author(s):  
Min Xiao ◽  
Cheung Poon ◽  
Priti Wanjara ◽  
Mohammad Jahazi ◽  
Zouheir Fawaz ◽  
...  
Keyword(s):  
Laser Welding ◽  
Nd:Yag Laser ◽  
Continuous Wave ◽  
Electron Beam Welding ◽  
Laser System ◽  
Welding Process ◽  
Aircraft Engine ◽  
Inconel 718 Alloy ◽  
Engine Components ◽  
Laser Welding Process

Ni-based superalloys are extensively used in the manufacture of aircraft engine components because of their excellent heat-resistant and corrosion-resistant properties. The principal joining processes for Ni-based superalloys are TIG welding, MIG welding, submerged arc welding, electron beam welding, and CO2 laser welding. In this investigation, a robotic 4-kW continuous-wave Nd:YAG laser system was used to identify the optimal laser welding process for 2.0 mm thick Inconel (IN) 718 sheets. The effect of various processing parameters, which included power input, welding speed, weld geometry and filler wire, was studied using the Taguchi design of experiment (DOE) methodology. The DOE methodology enabled the evaluation of the relationship between the process parameters and the quality of the welded joints, from which the optimal Nd:YAG laser welding process was developed for IN718 alloy. Joint quality was examined by tensile and nondestructive testing methods. Using the optimal process established in this research, mechanically-sound welds with narrow fusion and heat-affected zones were produced. The outcome of this research demonstrates the feasibility of the application of Nd:YAG laser in the joining of IN718 sheets for the manufacture of aircraft engine components.

Fiber Laser Welding of Noncombustible Magnesium Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 479-482 ◽  
Author(s):  
Yuji Sakai ◽  
Kazuhiro Nakata ◽  
Takuya Tsumura ◽  
Mitsuji Ueda ◽  
Tomoyuki Ueyama ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Vickers Hardness ◽  
Laser Power ◽  
Welded Joint ◽  
Welding Process ◽  
Fiber Laser Welding ◽  
Laser Welding Process

Noncombustible magnesium alloy AMC602 (Mg-6mass%Al-2mass%Ca) extruded sheet of 2.0mm thickness was successfully welded using a fiber laser welding process at welding speed of 10m/min at 3kW laser power. Tensile strength of the welded joint was about 82 to 88% of that of the base metal. Vickers hardness, tensile strength and micro structural properties are also discussed.

Microstructure Characterization of AZ31B Mg Alloy Welds Processed by Nd:YAG Laser Welding

2017 ◽  
Vol 898 ◽  
pp. 1051-1055 ◽  
Author(s):  
Hong Tao Liu ◽  
Ruo Chao Wang ◽  
Qing Liu ◽  
Ji Xue Zhou ◽  
Yan Fei Chen ◽  
...  
Keyword(s):  
Laser Welding ◽  
Nd:Yag Laser ◽  
Energy Dispersive Spectrometer ◽  
Base Material ◽  
Welding Process ◽  
Microstructure Characterization ◽  
Columnar Grains ◽  
Equiaxed Grains ◽  
Laser Welding Process

The Nd:YAG laser welding process of AZ31B alloys was performed by using the six-axis robot in this work. The microstructure characterization of AZ31B auto-welded joints was studied by using scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The laser welding process resulted in the formation of equiaxed grains in the center of the fusion zone (FZ) and columnar grains near the FZ boundary, meanwhile some eutectic β-Mg17Al12 particles were observed in the microstructure. No clear heat affected zone (HAZ) was observed in the welded AZ31B joint. Furthermore, some pores were observed in the base material (BM) and FZ.

Microstructure and Mechanical Properties of Nd:YAG Laser Welded Invar 36 Alloy

2011 ◽  
Vol 675-677 ◽  
pp. 739-742 ◽  
Author(s):  
Yue Zhao ◽  
Ai Ping Wu ◽  
Wei Yao ◽  
Zhi Min Wang ◽  
Yutaka S. Sato ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Nd:Yag Laser ◽  
Arc Welding ◽  
Welding Process ◽  
High Energy ◽  
High Susceptibility ◽  
Energy Beam ◽  
Microstructure And Mechanical Properties ◽  
And Storage

Invar 36 alloy is increasingly used as a structural material for manufacture of liquefied natural gas (LNG) transporters and storage tanks. However, the conventional arc welding of Invar 36 alloy has high susceptibility of hot-cracking. As a high-energy-beam welding process, laser welding could be effective for producing defect-free Invar 36 weld. In the present study, defect-free Invar 36 weld was successfully produced by Nd:YAG laser welding. The microstructure and mechanical properties of weld were also tested.

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