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...
Main Authors: | , , , , , , , |
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Format: | Article |
Language: | English |
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Prince of Songkla University
2015-06-01
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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. |
first_indexed | 2024-12-22T20:55:44Z |
format | Article |
id | doaj.art-0fb191920e3d4f458239b603725c80d5 |
institution | Directory Open Access Journal |
issn | 0125-3395 |
language | English |
last_indexed | 2024-12-22T20:55:44Z |
publishDate | 2015-06-01 |
publisher | Prince of Songkla University |
record_format | Article |
series | Songklanakarin Journal of Science and Technology (SJST) |
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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