Study on Appearance of Weld during Deep-Penetration Laser Welding of 304 Stainless Steel

Used YAG pulse laser to weld 304 stainless steel nuts, studied about the parameters such as peak power, pulse width, defocus distance impacting on the performance of the joints welded by laser. The studies showed that the tensile strength and torque of the nuts increased as the peak power and the pulse width increased.Burn through in welding easy occur when laser pulse energy is too big, pulse width is too wide or defocus distance is too low.

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Microstructure Analysis of Fiber Laser Welding between E36 and 304 Stainless Steel

Laser & Optoelectronics Progress ◽

10.3788/lop52.041403 ◽

2015 ◽

Vol 52 (4) ◽

pp. 041403

Author(s):

刘东宇 Liu Dongyu ◽

李东 Li Dong ◽

李凯斌 Li Kaibin ◽

陈倩倩 Chen Qianqian

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Fiber Laser ◽

Microstructure Analysis ◽

304 Stainless Steel ◽

Fiber Laser Welding

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Prediction of weld geometry, temperature contour and strain distribution in disk laser welding of dissimilar joining between copper & 304 stainless steel

Optik ◽

10.1016/j.ijleo.2020.165288 ◽

2020 ◽

Vol 219 ◽

pp. 165288

Author(s):

M. Aghaee Attar ◽

M. Ghoreishi ◽

Z. Malekshahi Beiranvand

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Strain Distribution ◽

304 Stainless Steel ◽

Disk Laser ◽

Dissimilar Joining ◽

Weld Geometry ◽

Temperature Contour

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Underwater local dry cavity laser welding of 304 stainless steel

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2018.05.025 ◽

2018 ◽

Vol 260 ◽

pp. 146-155 ◽

Cited By ~ 9

Author(s):

Ning Guo ◽

Yunlong Fu ◽

Xiao Xing ◽

Yangkun Liu ◽

Sixiang Zhao ◽

...

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

304 Stainless Steel ◽

Cavity Laser

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Deep penetration laser welding of austenitic stainless steel thick-plates using a 20 kW fiber laser

Journal of Laser Applications ◽

10.2351/1.5094176 ◽

2020 ◽

Vol 32 (1) ◽

pp. 012009 ◽

Cited By ~ 2

Author(s):

Chao Fang ◽

Jijun Xin ◽

Wenhua Dai ◽

Jing Wei ◽

Jiefeng Wu ◽

...

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Laser Welding ◽

Fiber Laser ◽

Deep Penetration ◽

Thick Plates

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Investigations on the Microstructure and the Fracture Surface of Pulsed Nd: YAG Laser Welding of AISI 304 Stainless Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.445.418 ◽

2012 ◽

Vol 445 ◽

pp. 418-423

Author(s):

Seyed Ali Asghar Akbari Mousavi ◽

A. Garehdaghi

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Cooling Rate ◽

304 Stainless Steel ◽

Chemical Compositions ◽

Operational Parameters ◽

Δ Ferrite ◽

Higher Power ◽

304 Austenitic Stainless Steel ◽

Pulsed Nd:Yag Laser Welding

The paper presents pulsed Nd:YAG laser welding of the 304 stainless steels. The welding tests were carried out with various operational parameters. The effects of laser welding variables on the geometry, microstructure and solidification of the weld are considered. The austenitic or ferritic solidification is produced in the 304 austenitic stainless steel depended upon the cooling rate and its chemical compositions. The possiblity of austenitic solidification compared with the ferritic solidification decreases with the chromium to nickel equivalent ratio and that increases with cooling rates. Moreover, more δ ferrite is obtained if the cooling rate is increased or the higher power laser is used. The surface of fracture samples was considered and the reason for failure was investigated. The study shows that the fracture is in ductile type.

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