Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo

Detalhes bibliográficos
Autor(a) principal: Luz, Temístocles de Sousa
Data de Publicação: 2009
Tipo de documento: Tese
Idioma: por
Título da fonte: Repositório Institucional da UFU
Texto Completo: https://repositorio.ufu.br/handle/123456789/14682
Resumo: Ferritic stainless steels in general present low weldability when compared with austenitic stainless steels. This factor has limited their applicability in welded structures. To achieve better mechanical behavior for these alloys it is necessary, besides alloy composition control, rigorous heat treatments. One example of these treatments is the Box furnace annealing, which promotes greater control of the parameters, allowing better microstructural homogeneity that in turn tends towards better mechanical characteristics of the final product. Nowadays, though, the differential is to achieve improved mechanical properties at a low processing cost. One of the processes capable of achieving lower costs is continuous furnace annealing, which achieves more productivity therefore reducing the production costs. Taking into account that welding is one of the most important material bonding processes, it is greatly important for the material to be, in some sense, able to be welded and to assure good weld quality. Thus, the present study aims to analyze, using the mechanical characteristics of the alloy, the efficiency of the continuous furnace heat treatment process, for an 11% chromium stainless steel alloy. This study also covers the process and metallurgy applied to welding of this alloy. Two types of continuous consumables for alloy welding were used for this: A solid, commercial (AWS ER309LSi), conventionally used for ferritic alloys, and an experimental tubular electrode of class AWS EC 409. A survey of the metal transfer characteristics was taken for each of these consumables in order to establish adequate parameters for welding of this experimental alloy. Once those parameters were established, two heat treatment conditions (Box Furnace and Continuous Furnace) of this alloy were welded, with two welding energy conditions, for each type of consumable. All conditions were submitted to microstructural analysis by optical microscopy and SEM, besides being evaluated by Charpy-V impact toughness. The results showed that the structure of this new alloy presents good base metal characteristics, allowing utilization of continuous furnace treatment. At the welding, though, the region submitted to high temperatures (heat affected zone HAZ) tends to form delta-ferrite. This component is the result of cold work remains and may, under certain conditions, embrittle the HAZ.
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spelling 2016-06-22T18:39:23Z2009-12-022016-06-22T18:39:23Z2009-05-08LUZ, Temístocles de Sousa. Operational and metallurgic aspects in welding of ferritic stainless steel with 11% chromium. 2009. 233 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2009.https://repositorio.ufu.br/handle/123456789/14682Ferritic stainless steels in general present low weldability when compared with austenitic stainless steels. This factor has limited their applicability in welded structures. To achieve better mechanical behavior for these alloys it is necessary, besides alloy composition control, rigorous heat treatments. One example of these treatments is the Box furnace annealing, which promotes greater control of the parameters, allowing better microstructural homogeneity that in turn tends towards better mechanical characteristics of the final product. Nowadays, though, the differential is to achieve improved mechanical properties at a low processing cost. One of the processes capable of achieving lower costs is continuous furnace annealing, which achieves more productivity therefore reducing the production costs. Taking into account that welding is one of the most important material bonding processes, it is greatly important for the material to be, in some sense, able to be welded and to assure good weld quality. Thus, the present study aims to analyze, using the mechanical characteristics of the alloy, the efficiency of the continuous furnace heat treatment process, for an 11% chromium stainless steel alloy. This study also covers the process and metallurgy applied to welding of this alloy. Two types of continuous consumables for alloy welding were used for this: A solid, commercial (AWS ER309LSi), conventionally used for ferritic alloys, and an experimental tubular electrode of class AWS EC 409. A survey of the metal transfer characteristics was taken for each of these consumables in order to establish adequate parameters for welding of this experimental alloy. Once those parameters were established, two heat treatment conditions (Box Furnace and Continuous Furnace) of this alloy were welded, with two welding energy conditions, for each type of consumable. All conditions were submitted to microstructural analysis by optical microscopy and SEM, besides being evaluated by Charpy-V impact toughness. The results showed that the structure of this new alloy presents good base metal characteristics, allowing utilization of continuous furnace treatment. At the welding, though, the region submitted to high temperatures (heat affected zone HAZ) tends to form delta-ferrite. This component is the result of cold work remains and may, under certain conditions, embrittle the HAZ.Os aços inoxidáveis ferríticos, geralmente, apresentam baixa soldabilidade em relação aos austeníticos, fato que limitou sua a aplicabilidade em estruturas soldadas durante muito tempo. Para que se consiga boas propriedades mecânicas nessas ligas, além do controle da composição da liga, esses aços passam por rigorosos tratamentos térmicos como é o caso do forno tipo Box, que permite maior homogeneidade microestrutural, com tendência de melhores características mecânicas desse aço. Atualmente, o grande diferencial é conseguir boas características mecânicas a um baixo custo de processamento e isso é passível de se conseguir com o tratamento térmico em forno contínuo, pela maior produtividade e menor custo de produção. Levando em consideração que a soldagem atualmente é um dos principais processos de união de materiais, é de grande importância que o material desenvolvido seja, de certa forma, passível de soldagem com boas características. Assim, o presente estudo visa analisar, operacional e metalurgicamente, a eficiência do processo de tratamento térmico (forno tipo Box e contínuo) em uma liga de aço inoxidável com teor de cromo de 11% submetido à soldagem. Para tanto, foram utilizados dois tipos de consumíveis contínuos para a união da liga, sendo um maciço, comercial (AWS ER309LSi), convencionalmente utilizado para as ligas ferríticas, e um eletrodo tubular de caráter experimental da classe AWS EC 409. Para cada um desses consumíveis foi realizado um levantamento das características de transferência metálica a fim de se estabelecer parâmetros adequados à soldagem do material ferrítico. Estabelecidos tais parâmetros, foram soldadas amostras das duas condições de tratamento térmico da liga (em forno tipo Box e em Contínuo) em duas condições de energia de soldagem, para cada tipo de consumível. Todas as condições foram submetidas à análise microestrutural, através de microscopia óptica e MEV, além de ser avaliada a tenacidade ao impacto, através de charpy-V. Os resultados mostraram que a estrutura dessa nova liga permite boas características do metal de base, existindo a possibilidade de utilização do tratamento em forno contínuo. Constatou-se ainda a presença e a influência marcante da ferrita δ sobre as características de tenacidade ao impacto da região da ZAC.Conselho Nacional de Desenvolvimento Científico e TecnológicoDoutor em Engenharia Mecânicaapplication/pdfporUniversidade Federal de UberlândiaPrograma de Pós-graduação em Engenharia MecânicaUFUBREngenhariasAço inoxidável ferríticoSoldagemCharpy-VFerrita-δAço inoxidávelFerritic stainless steelWeldingCharpy-VDelta-ferriteCNPQ::ENGENHARIAS::ENGENHARIA MECANICAAspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromoOperational and metallurgic aspects in welding of ferritic stainless steel with 11% chromiuminfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisFarias, Jesualdo Pereirahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793198Y6Ferraresi, Valtair Antôniohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787800U3Silva, Márcio Bacci dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785913J0Scotti, Américohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781109E4Buschinelli, Augusto Jose de Almeidahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4721446D7Motta, Marcelo Ferreirahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792805H6http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760135Y9Luz, Temístocles de Sousa81756465info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFUTHUMBNAILTese Parte 01.pdf.jpgTese Parte 01.pdf.jpgGenerated Thumbnailimage/jpeg1279https://repositorio.ufu.br/bitstream/123456789/14682/7/Tese%20Parte%2001.pdf.jpg62070c3da77a0785fd191f4ac9a10426MD57Tese Parte 02.pdf.jpgTese Parte 02.pdf.jpgGenerated Thumbnailimage/jpeg1428https://repositorio.ufu.br/bitstream/123456789/14682/8/Tese%20Parte%2002.pdf.jpg81481a0129aee5a92b78d9bcf6e0abbcMD58Tese Parte 03.pdf.jpgTese Parte 03.pdf.jpgGenerated Thumbnailimage/jpeg1572https://repositorio.ufu.br/bitstream/123456789/14682/9/Tese%20Parte%2003.pdf.jpgd3317ae8e5101441aadf19a5c8caa35aMD59ORIGINALTese Parte 01.pdfapplication/pdf4718980https://repositorio.ufu.br/bitstream/123456789/14682/1/Tese%20Parte%2001.pdfecdb9f3551cbe085ec39dfa0723b2f40MD51Tese Parte 02.pdfapplication/pdf9056954https://repositorio.ufu.br/bitstream/123456789/14682/2/Tese%20Parte%2002.pdf854ef2213fab21a12bb40e5391521776MD52Tese Parte 03.pdfapplication/pdf8921911https://repositorio.ufu.br/bitstream/123456789/14682/3/Tese%20Parte%2003.pdf79f3ac5c000990a9a6e2dea533245518MD53TEXTTese Parte 01.pdf.txtTese Parte 01.pdf.txtExtracted texttext/plain140650https://repositorio.ufu.br/bitstream/123456789/14682/4/Tese%20Parte%2001.pdf.txt1be2c658845c3614ea6f448c408813d7MD54Tese Parte 02.pdf.txtTese Parte 02.pdf.txtExtracted texttext/plain134211https://repositorio.ufu.br/bitstream/123456789/14682/5/Tese%20Parte%2002.pdf.txtdb97d798562cc470b4c35a879308ef36MD55Tese Parte 03.pdf.txtTese Parte 03.pdf.txtExtracted texttext/plain140914https://repositorio.ufu.br/bitstream/123456789/14682/6/Tese%20Parte%2003.pdf.txtcb5caa9082ad2861c4e6aa3560da20edMD56123456789/146822021-09-17 10:09:57.242oai:repositorio.ufu.br:123456789/14682Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2021-09-17T13:09:57Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false
dc.title.por.fl_str_mv Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
dc.title.alternative.eng.fl_str_mv Operational and metallurgic aspects in welding of ferritic stainless steel with 11% chromium
title Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
spellingShingle Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
Luz, Temístocles de Sousa
Aço inoxidável ferrítico
Soldagem
Charpy-V
Ferrita-δ
Aço inoxidável
Ferritic stainless steel
Welding
Charpy-V
Delta-ferrite
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
title_short Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
title_full Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
title_fullStr Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
title_full_unstemmed Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
title_sort Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
author Luz, Temístocles de Sousa
author_facet Luz, Temístocles de Sousa
author_role author
dc.contributor.advisor-co1.fl_str_mv Farias, Jesualdo Pereira
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793198Y6
dc.contributor.advisor1.fl_str_mv Ferraresi, Valtair Antônio
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787800U3
dc.contributor.referee1.fl_str_mv Silva, Márcio Bacci da
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785913J0
dc.contributor.referee2.fl_str_mv Scotti, Américo
dc.contributor.referee2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781109E4
dc.contributor.referee3.fl_str_mv Buschinelli, Augusto Jose de Almeida
dc.contributor.referee3Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4721446D7
dc.contributor.referee4.fl_str_mv Motta, Marcelo Ferreira
dc.contributor.referee4Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792805H6
dc.contributor.authorLattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760135Y9
dc.contributor.author.fl_str_mv Luz, Temístocles de Sousa
contributor_str_mv Farias, Jesualdo Pereira
Ferraresi, Valtair Antônio
Silva, Márcio Bacci da
Scotti, Américo
Buschinelli, Augusto Jose de Almeida
Motta, Marcelo Ferreira
dc.subject.por.fl_str_mv Aço inoxidável ferrítico
Soldagem
Charpy-V
Ferrita-δ
Aço inoxidável
topic Aço inoxidável ferrítico
Soldagem
Charpy-V
Ferrita-δ
Aço inoxidável
Ferritic stainless steel
Welding
Charpy-V
Delta-ferrite
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
dc.subject.eng.fl_str_mv Ferritic stainless steel
Welding
Charpy-V
Delta-ferrite
dc.subject.cnpq.fl_str_mv CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
description Ferritic stainless steels in general present low weldability when compared with austenitic stainless steels. This factor has limited their applicability in welded structures. To achieve better mechanical behavior for these alloys it is necessary, besides alloy composition control, rigorous heat treatments. One example of these treatments is the Box furnace annealing, which promotes greater control of the parameters, allowing better microstructural homogeneity that in turn tends towards better mechanical characteristics of the final product. Nowadays, though, the differential is to achieve improved mechanical properties at a low processing cost. One of the processes capable of achieving lower costs is continuous furnace annealing, which achieves more productivity therefore reducing the production costs. Taking into account that welding is one of the most important material bonding processes, it is greatly important for the material to be, in some sense, able to be welded and to assure good weld quality. Thus, the present study aims to analyze, using the mechanical characteristics of the alloy, the efficiency of the continuous furnace heat treatment process, for an 11% chromium stainless steel alloy. This study also covers the process and metallurgy applied to welding of this alloy. Two types of continuous consumables for alloy welding were used for this: A solid, commercial (AWS ER309LSi), conventionally used for ferritic alloys, and an experimental tubular electrode of class AWS EC 409. A survey of the metal transfer characteristics was taken for each of these consumables in order to establish adequate parameters for welding of this experimental alloy. Once those parameters were established, two heat treatment conditions (Box Furnace and Continuous Furnace) of this alloy were welded, with two welding energy conditions, for each type of consumable. All conditions were submitted to microstructural analysis by optical microscopy and SEM, besides being evaluated by Charpy-V impact toughness. The results showed that the structure of this new alloy presents good base metal characteristics, allowing utilization of continuous furnace treatment. At the welding, though, the region submitted to high temperatures (heat affected zone HAZ) tends to form delta-ferrite. This component is the result of cold work remains and may, under certain conditions, embrittle the HAZ.
publishDate 2009
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2016-06-22T18:39:23Z
dc.date.issued.fl_str_mv 2009-05-08
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dc.identifier.citation.fl_str_mv LUZ, Temístocles de Sousa. Operational and metallurgic aspects in welding of ferritic stainless steel with 11% chromium. 2009. 233 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2009.
dc.identifier.uri.fl_str_mv https://repositorio.ufu.br/handle/123456789/14682
identifier_str_mv LUZ, Temístocles de Sousa. Operational and metallurgic aspects in welding of ferritic stainless steel with 11% chromium. 2009. 233 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2009.
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dc.publisher.none.fl_str_mv Universidade Federal de Uberlândia
dc.publisher.program.fl_str_mv Programa de Pós-graduação em Engenharia Mecânica
dc.publisher.initials.fl_str_mv UFU
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publisher.none.fl_str_mv Universidade Federal de Uberlândia
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