Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista soldagem & inspeção (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242021000100207 |
Resumo: | Abstract: P91 steels are used as substrate material for steam turbine components like bush, valve seat internals, and engineering valves. These components have hardfacing of cobalt-based material to reduce the high temperature wear loss and to improve the surface hardness. However, delamination failure and higher heat affected zone (HAZ) hardness were identified challenges for P91 steels. Hence, this demands the development of a suitable weld hardfacing approach to resolve the said challenges. In this work, NiCrSiBC (Colmonoy 6) has been considered as a hardfacing material to replace cobalt-based Stellite 6 material due to elimination of radiation activity, lower cost, and higher coating hardness. FCAW and PTA techniques were used to deposit buffer layer (SS-309L) and hardfacing layer (NiCrSiBC) respectively. Sample WBL (with deposition of buffer layer) and sample WOBL (without deposition of buffer layer) are considered approaches to study the metallurgical characterization for each case. Higher coating hardness, lower HAZ hardness and lower Fe dilution were observed in sample WBL. Cr7C3, Cr2B, and Cr5B3 hard phases in block shape together with ϒ- nickel matrix solid solution was observed in coating region of sample WBL. Overall, sample WBL approach was considered to overcome weld hardfacing challenges for steam turbine industries. |
id |
ABS-1_98f2bddd21d9aa7d89c1888a95624893 |
---|---|
oai_identifier_str |
oai:scielo:S0104-92242021000100207 |
network_acronym_str |
ABS-1 |
network_name_str |
Revista soldagem & inspeção (Online) |
repository_id_str |
|
spelling |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine ComponentsWeld hardfacingBuffer layerP91 steelNiCrSiBC hardfacingMetallurgical characterizationAbstract: P91 steels are used as substrate material for steam turbine components like bush, valve seat internals, and engineering valves. These components have hardfacing of cobalt-based material to reduce the high temperature wear loss and to improve the surface hardness. However, delamination failure and higher heat affected zone (HAZ) hardness were identified challenges for P91 steels. Hence, this demands the development of a suitable weld hardfacing approach to resolve the said challenges. In this work, NiCrSiBC (Colmonoy 6) has been considered as a hardfacing material to replace cobalt-based Stellite 6 material due to elimination of radiation activity, lower cost, and higher coating hardness. FCAW and PTA techniques were used to deposit buffer layer (SS-309L) and hardfacing layer (NiCrSiBC) respectively. Sample WBL (with deposition of buffer layer) and sample WOBL (without deposition of buffer layer) are considered approaches to study the metallurgical characterization for each case. Higher coating hardness, lower HAZ hardness and lower Fe dilution were observed in sample WBL. Cr7C3, Cr2B, and Cr5B3 hard phases in block shape together with ϒ- nickel matrix solid solution was observed in coating region of sample WBL. Overall, sample WBL approach was considered to overcome weld hardfacing challenges for steam turbine industries.Associação Brasileira de Soldagem2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242021000100207Soldagem & Inspeção v.26 2021reponame:Revista soldagem & inspeção (Online)instname:Associação Brasileira de Soldagem (ABS)instacron:ABS10.1590/0104-9224/si26.08info:eu-repo/semantics/openAccessNaik,H. V.Kalyankar,V. D.eng2021-05-17T00:00:00Zoai:scielo:S0104-92242021000100207Revistahttp://abs-soldagem.org.br/s&i/https://old.scielo.br/oai/scielo-oai.php||revista-si@abs-soldagem.org.br0104-92241980-6973opendoar:2021-05-17T00:00Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS)false |
dc.title.none.fl_str_mv |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
title |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
spellingShingle |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components Naik,H. V. Weld hardfacing Buffer layer P91 steel NiCrSiBC hardfacing Metallurgical characterization |
title_short |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
title_full |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
title_fullStr |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
title_full_unstemmed |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
title_sort |
Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components |
author |
Naik,H. V. |
author_facet |
Naik,H. V. Kalyankar,V. D. |
author_role |
author |
author2 |
Kalyankar,V. D. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Naik,H. V. Kalyankar,V. D. |
dc.subject.por.fl_str_mv |
Weld hardfacing Buffer layer P91 steel NiCrSiBC hardfacing Metallurgical characterization |
topic |
Weld hardfacing Buffer layer P91 steel NiCrSiBC hardfacing Metallurgical characterization |
description |
Abstract: P91 steels are used as substrate material for steam turbine components like bush, valve seat internals, and engineering valves. These components have hardfacing of cobalt-based material to reduce the high temperature wear loss and to improve the surface hardness. However, delamination failure and higher heat affected zone (HAZ) hardness were identified challenges for P91 steels. Hence, this demands the development of a suitable weld hardfacing approach to resolve the said challenges. In this work, NiCrSiBC (Colmonoy 6) has been considered as a hardfacing material to replace cobalt-based Stellite 6 material due to elimination of radiation activity, lower cost, and higher coating hardness. FCAW and PTA techniques were used to deposit buffer layer (SS-309L) and hardfacing layer (NiCrSiBC) respectively. Sample WBL (with deposition of buffer layer) and sample WOBL (without deposition of buffer layer) are considered approaches to study the metallurgical characterization for each case. Higher coating hardness, lower HAZ hardness and lower Fe dilution were observed in sample WBL. Cr7C3, Cr2B, and Cr5B3 hard phases in block shape together with ϒ- nickel matrix solid solution was observed in coating region of sample WBL. Overall, sample WBL approach was considered to overcome weld hardfacing challenges for steam turbine industries. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242021000100207 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242021000100207 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-9224/si26.08 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Soldagem |
publisher.none.fl_str_mv |
Associação Brasileira de Soldagem |
dc.source.none.fl_str_mv |
Soldagem & Inspeção v.26 2021 reponame:Revista soldagem & inspeção (Online) instname:Associação Brasileira de Soldagem (ABS) instacron:ABS |
instname_str |
Associação Brasileira de Soldagem (ABS) |
instacron_str |
ABS |
institution |
ABS |
reponame_str |
Revista soldagem & inspeção (Online) |
collection |
Revista soldagem & inspeção (Online) |
repository.name.fl_str_mv |
Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS) |
repository.mail.fl_str_mv |
||revista-si@abs-soldagem.org.br |
_version_ |
1754213004439715840 |