Effects of B on microstructure and hardenability of resistance seam welded HSLA linepipe steel
The effects of B on the microstructural and mechanical characteristics of resistance seam welded high strength low alloy linepipe steel were investigated at different regions, such as weld, heat affected zone (HAZ) and base. Because most of the solute B atoms were already precipitated as iron boroca...
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| Veröffentlicht in: | Science and technology of welding and joining 2012-01, Vol.17 (1), p.77-84 |
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| container_title | Science and technology of welding and joining |
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| creator | Jung, J-G Kim, J Noh, K-M Park, K K Lee, Y-K |
| description | The effects of B on the microstructural and mechanical characteristics
of resistance seam welded high strength low alloy linepipe steel were investigated
at different regions, such as weld, heat affected zone (HAZ) and
base. Because most of the solute B atoms were already precipitated as iron
borocarbides and iron borides in as welded steels, the improved hardenability
was not observed regardless of the observed regions. The amount of dissolved
B precipitates increased with austenitising temperature, and the pre-existing
B precipitates were fully dissolved at 950°C for 180 s. The segregation
of solute B atoms into austenite grain boundaries was more marked at higher
austenitising temperatures, and the segregated solute B atoms greatly increased
the hardenability of the austenitised pipes, resulting in hard microstructures
like bainite and martensite. The B addition also effectively compensated for
the deteriorated hardness at the weld and HAZ of the tempered specimens, although
B atoms were precipitated during tempering. |
| doi_str_mv | 10.1179/1362171811Y.0000000082 |
| format | Article |
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of resistance seam welded high strength low alloy linepipe steel were investigated
at different regions, such as weld, heat affected zone (HAZ) and
base. Because most of the solute B atoms were already precipitated as iron
borocarbides and iron borides in as welded steels, the improved hardenability
was not observed regardless of the observed regions. The amount of dissolved
B precipitates increased with austenitising temperature, and the pre-existing
B precipitates were fully dissolved at 950°C for 180 s. The segregation
of solute B atoms into austenite grain boundaries was more marked at higher
austenitising temperatures, and the segregated solute B atoms greatly increased
the hardenability of the austenitised pipes, resulting in hard microstructures
like bainite and martensite. The B addition also effectively compensated for
the deteriorated hardness at the weld and HAZ of the tempered specimens, although
B atoms were precipitated during tempering.</description><identifier>ISSN: 1362-1718</identifier><identifier>EISSN: 1743-2936</identifier><identifier>DOI: 10.1179/1362171811Y.0000000082</identifier><language>eng</language><publisher>London, England: Taylor & Francis</publisher><subject>Boron distribution ; Dissolution ; Hardenability ; Heat affected zone ; High strength low alloy steels ; HSLA linepipe steel ; Microstructure ; Precipitates ; Resistance seam welding ; Seams ; Steels</subject><ispartof>Science and technology of welding and joining, 2012-01, Vol.17 (1), p.77-84</ispartof><rights>2012 Institute of Materials, Minerals and Mining Published by Maney on behalf of the Institute 2012</rights><rights>2012 Crown in Right of Canada Published by Maney on behalf of the Institute</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c390t-8ef84c392c219801f8a2d0fac62618b0b69c51dc0cf0747373239d2292756ca43</citedby><cites>FETCH-LOGICAL-c390t-8ef84c392c219801f8a2d0fac62618b0b69c51dc0cf0747373239d2292756ca43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1179/1362171811Y.0000000082$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://journals.sagepub.com/doi/10.1179/1362171811Y.0000000082$$EHTML$$P50$$Gsage$$H</linktohtml><link.rule.ids>314,776,780,21798,27901,27902,43597,43598</link.rule.ids></links><search><creatorcontrib>Jung, J-G</creatorcontrib><creatorcontrib>Kim, J</creatorcontrib><creatorcontrib>Noh, K-M</creatorcontrib><creatorcontrib>Park, K K</creatorcontrib><creatorcontrib>Lee, Y-K</creatorcontrib><title>Effects of B on microstructure and hardenability of resistance seam welded HSLA linepipe steel</title><title>Science and technology of welding and joining</title><description>The effects of B on the microstructural and mechanical characteristics
of resistance seam welded high strength low alloy linepipe steel were investigated
at different regions, such as weld, heat affected zone (HAZ) and
base. Because most of the solute B atoms were already precipitated as iron
borocarbides and iron borides in as welded steels, the improved hardenability
was not observed regardless of the observed regions. The amount of dissolved
B precipitates increased with austenitising temperature, and the pre-existing
B precipitates were fully dissolved at 950°C for 180 s. The segregation
of solute B atoms into austenite grain boundaries was more marked at higher
austenitising temperatures, and the segregated solute B atoms greatly increased
the hardenability of the austenitised pipes, resulting in hard microstructures
like bainite and martensite. The B addition also effectively compensated for
the deteriorated hardness at the weld and HAZ of the tempered specimens, although
B atoms were precipitated during tempering.</description><subject>Boron distribution</subject><subject>Dissolution</subject><subject>Hardenability</subject><subject>Heat affected zone</subject><subject>High strength low alloy steels</subject><subject>HSLA linepipe steel</subject><subject>Microstructure</subject><subject>Precipitates</subject><subject>Resistance seam welding</subject><subject>Seams</subject><subject>Steels</subject><issn>1362-1718</issn><issn>1743-2936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhhdRsNT-BcnRy9Z8bPfjWEu1QsGDevBiyGYnGslu1iRL6b83yxb05lxmYJ53hvdNkmuCl4QU1S1hOSUFKQl5W-JTlfQsmZEiYymtWH4e5wilI3WZLLzXNSaM0oyxbJa8b5UCGTyyCt0h26FWS2d9cIMMgwMkugZ9CtdAJ2ptdDiOoAOvfRCdBORBtOgApoEG7Z73a2R0B73u4yYAmKvkQgnjYXHq8-T1fvuy2aX7p4fHzXqfSlbhkJagyiyOVFJSlZioUtAGKyFzmpOyxnVeyRVpJJYKF1nBCkZZ1VBa0WKVS5GxeXIz3e2d_R7AB95qL8EY0YEdPCeY4LKID_KI5hM6-vQOFO-dboU7RoiPmfI_mfLfTKOQTUIvPoB_2cF10dL_qvWk0p2yrhUH60zDgzga65SLGWrP2T83fgDCQYty</recordid><startdate>20120101</startdate><enddate>20120101</enddate><creator>Jung, J-G</creator><creator>Kim, J</creator><creator>Noh, K-M</creator><creator>Park, K K</creator><creator>Lee, Y-K</creator><general>Taylor & Francis</general><general>SAGE Publications</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20120101</creationdate><title>Effects of B on microstructure and hardenability of resistance seam welded HSLA linepipe steel</title><author>Jung, J-G ; Kim, J ; Noh, K-M ; Park, K K ; Lee, Y-K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c390t-8ef84c392c219801f8a2d0fac62618b0b69c51dc0cf0747373239d2292756ca43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Boron distribution</topic><topic>Dissolution</topic><topic>Hardenability</topic><topic>Heat affected zone</topic><topic>High strength low alloy steels</topic><topic>HSLA linepipe steel</topic><topic>Microstructure</topic><topic>Precipitates</topic><topic>Resistance seam welding</topic><topic>Seams</topic><topic>Steels</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jung, J-G</creatorcontrib><creatorcontrib>Kim, J</creatorcontrib><creatorcontrib>Noh, K-M</creatorcontrib><creatorcontrib>Park, K K</creatorcontrib><creatorcontrib>Lee, Y-K</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Science and technology of welding and joining</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jung, J-G</au><au>Kim, J</au><au>Noh, K-M</au><au>Park, K K</au><au>Lee, Y-K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of B on microstructure and hardenability of resistance seam welded HSLA linepipe steel</atitle><jtitle>Science and technology of welding and joining</jtitle><date>2012-01-01</date><risdate>2012</risdate><volume>17</volume><issue>1</issue><spage>77</spage><epage>84</epage><pages>77-84</pages><issn>1362-1718</issn><eissn>1743-2936</eissn><abstract>The effects of B on the microstructural and mechanical characteristics
of resistance seam welded high strength low alloy linepipe steel were investigated
at different regions, such as weld, heat affected zone (HAZ) and
base. Because most of the solute B atoms were already precipitated as iron
borocarbides and iron borides in as welded steels, the improved hardenability
was not observed regardless of the observed regions. The amount of dissolved
B precipitates increased with austenitising temperature, and the pre-existing
B precipitates were fully dissolved at 950°C for 180 s. The segregation
of solute B atoms into austenite grain boundaries was more marked at higher
austenitising temperatures, and the segregated solute B atoms greatly increased
the hardenability of the austenitised pipes, resulting in hard microstructures
like bainite and martensite. The B addition also effectively compensated for
the deteriorated hardness at the weld and HAZ of the tempered specimens, although
B atoms were precipitated during tempering.</abstract><cop>London, England</cop><pub>Taylor & Francis</pub><doi>10.1179/1362171811Y.0000000082</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1362-1718 |
| ispartof | Science and technology of welding and joining, 2012-01, Vol.17 (1), p.77-84 |
| issn | 1362-1718 1743-2936 |
| language | eng |
| recordid | cdi_sage_journals_10_1179_1362171811Y_0000000082 |
| source | SAGE Complete |
| subjects | Boron distribution Dissolution Hardenability Heat affected zone High strength low alloy steels HSLA linepipe steel Microstructure Precipitates Resistance seam welding Seams Steels |
| title | Effects of B on microstructure and hardenability of resistance seam welded HSLA linepipe steel |
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