Laser welding study for further development in essential power plant part repairs

The objective of this research work was to study the effects of laser welding when compared with shield metal arc welding (SMAW) process on the heat input, welded deposit rate, residual stress, distortion, microstructure and micro hardness. The martensitic stainless steel grade 431 specimens were...

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Main Authors: Isarawit Chaopanich, Jitti Buapoon, Sirichai Wanavimolkul, Krisda Harnsombat, Supapol Oupanant, Sompong Tiasakul, Sakarin Bowngern, Tinnaphop Poolkhaolan
Format: Article
Language:English
Published: Prince of Songkla University 2015-06-01
Series:Songklanakarin Journal of Science and Technology (SJST)
Subjects:
Online Access:http://rdo.psu.ac.th/sjstweb/journal/37-3/37-3-14.pdf
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author Isarawit Chaopanich
Jitti Buapoon
Sirichai Wanavimolkul
Krisda Harnsombat
Supapol Oupanant
Sompong Tiasakul
Sakarin Bowngern
Tinnaphop Poolkhaolan
author_facet Isarawit Chaopanich
Jitti Buapoon
Sirichai Wanavimolkul
Krisda Harnsombat
Supapol Oupanant
Sompong Tiasakul
Sakarin Bowngern
Tinnaphop Poolkhaolan
author_sort Isarawit Chaopanich
collection DOAJ
description The objective of this research work was to study the effects of laser welding when compared with shield metal arc welding (SMAW) process on the heat input, welded deposit rate, residual stress, distortion, microstructure and micro hardness. The martensitic stainless steel grade 431 specimens were overlay welded with the stainless steel filler metals. From the results, the heat input of 0.26 kJ/mm in laser welding calculated was significantly lower than that of 1.66 kJ/mm in SMAW, and contributed to low level residual stress, minimal distortion, very small penetration depth and heat affected zone (HAZ) of less than 100 µm. The micro hardness results indicated that the maximum value from laser welding in the HAZ was 370.2 HV lower than the value from SMAW of 525.5 HV. The welded deposit rate for laser welding was with 26.5 mm3 /min remarkably lower than the rate for SMAW of 1,800 mm3 /min.
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spelling doaj.art-0fb191920e3d4f458239b603725c80d52022-12-21T18:12:57ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952015-06-01373361367Laser welding study for further development in essential power plant part repairsIsarawit Chaopanich0Jitti Buapoon1Sirichai Wanavimolkul2Krisda Harnsombat3Supapol Oupanant4Sompong Tiasakul5Sakarin Bowngern6Tinnaphop Poolkhaolan7Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.Workshop Engineering Section, Workshop and Spare Parts Division, Electricity Generating Authority of Thailand, Nong Chok, Bangkok, 10530 Thailand.The objective of this research work was to study the effects of laser welding when compared with shield metal arc welding (SMAW) process on the heat input, welded deposit rate, residual stress, distortion, microstructure and micro hardness. The martensitic stainless steel grade 431 specimens were overlay welded with the stainless steel filler metals. From the results, the heat input of 0.26 kJ/mm in laser welding calculated was significantly lower than that of 1.66 kJ/mm in SMAW, and contributed to low level residual stress, minimal distortion, very small penetration depth and heat affected zone (HAZ) of less than 100 µm. The micro hardness results indicated that the maximum value from laser welding in the HAZ was 370.2 HV lower than the value from SMAW of 525.5 HV. The welded deposit rate for laser welding was with 26.5 mm3 /min remarkably lower than the rate for SMAW of 1,800 mm3 /min.http://rdo.psu.ac.th/sjstweb/journal/37-3/37-3-14.pdflaser weldingshield metal arc weldingheat inputresidual stressheat affected zone
spellingShingle Isarawit Chaopanich
Jitti Buapoon
Sirichai Wanavimolkul
Krisda Harnsombat
Supapol Oupanant
Sompong Tiasakul
Sakarin Bowngern
Tinnaphop Poolkhaolan
Laser welding study for further development in essential power plant part repairs
Songklanakarin Journal of Science and Technology (SJST)
laser welding
shield metal arc welding
heat input
residual stress
heat affected zone
title Laser welding study for further development in essential power plant part repairs
title_full Laser welding study for further development in essential power plant part repairs
title_fullStr Laser welding study for further development in essential power plant part repairs
title_full_unstemmed Laser welding study for further development in essential power plant part repairs
title_short Laser welding study for further development in essential power plant part repairs
title_sort laser welding study for further development in essential power plant part repairs
topic laser welding
shield metal arc welding
heat input
residual stress
heat affected zone
url http://rdo.psu.ac.th/sjstweb/journal/37-3/37-3-14.pdf
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AT krisdaharnsombat laserweldingstudyforfurtherdevelopmentinessentialpowerplantpartrepairs
AT supapoloupanant laserweldingstudyforfurtherdevelopmentinessentialpowerplantpartrepairs
AT sompongtiasakul laserweldingstudyforfurtherdevelopmentinessentialpowerplantpartrepairs
AT sakarinbowngern laserweldingstudyforfurtherdevelopmentinessentialpowerplantpartrepairs
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