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Microstructure and Mechanical Properties of Intercritical Heat-affected Zone of X80 Pipeline Steel in Simulated In-Service Welding 被引量:4

Microstructure and Mechanical Properties of Intercritical Heat-affected Zone of X80 Pipeline Steel in Simulated In-Service Welding
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摘要 The intercritical heat-affected zone(ICHAZ) of X80 pipeline steel was simulated by using the Gleeble-3500thermal/mechanical simulator according to the thermal cycle of in-service welding.The microstructures of ICHAZ with different cooling rates were examined,and the hardness,the toughness and corresponding fractography were investigated.Results show that untransformed bainite and ferrite as well as retransformed fine bainite and martensite–austenite(M–A)constituents constitute the microstructure of ICHAZ.The two different morphologies of M–A constituents are stringer and block.Second phase particles which mainly composed of Ti,Nb,C,Fe and Cu coarsened in ICHAZ.Compared with normal welding condition,the toughness of ICHAZ is poor when the cooling time is short under in-service welding condition because of the large area fraction and size of M–A constituents that connect into chains and distribute at the grain boundaries.The Vickers hardness of ICHAZ that decreases with the increase in the cooling time is independent with the area fraction of M–A constituents. The intercritical heat-affected zone(ICHAZ) of X80 pipeline steel was simulated by using the Gleeble-3500thermal/mechanical simulator according to the thermal cycle of in-service welding.The microstructures of ICHAZ with different cooling rates were examined,and the hardness,the toughness and corresponding fractography were investigated.Results show that untransformed bainite and ferrite as well as retransformed fine bainite and martensite–austenite(M–A)constituents constitute the microstructure of ICHAZ.The two different morphologies of M–A constituents are stringer and block.Second phase particles which mainly composed of Ti,Nb,C,Fe and Cu coarsened in ICHAZ.Compared with normal welding condition,the toughness of ICHAZ is poor when the cooling time is short under in-service welding condition because of the large area fraction and size of M–A constituents that connect into chains and distribute at the grain boundaries.The Vickers hardness of ICHAZ that decreases with the increase in the cooling time is independent with the area fraction of M–A constituents.
出处 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2015年第7期883-891,共9页 金属学报(英文版)
基金 supported by Key Project of Tianjin Municipal Science and Technology Support Program (No.11ZCGYSF00100) Tianjin Natural Science Foundation (No.11JCYBJC06000) the Gansu province Science and Technology Support Program (No.1204GKCA007)
关键词 X80 pipeline steel In-service welding Heat-affected zone MICROSTRUCTURE TOUGHNESS X80 pipeline steel In-service welding Heat-affected zone Microstructure Toughness
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  • 1Z.Y.Huang,Q.Shi,F.Q.Chen,Y.F.Shi,Acta Metall.Sin.(Engl.Lett.)27,421(2014).
  • 2A.Lambert-Perlade,A.F.Gourgues,J.Besson,T.Sturel,A.Pineau,Metall.Mater.Trans.A 35,1053(2004).
  • 3L.Y.Lan,C.L.Qiu,D.W.Zhao,X.H.Gao,L.X.Du,Mater.Sci.Eng.A 529,200(2011).
  • 4Y.You,C.J.Shang,N.Wenjin,S.Subramanian,Mater.Sci.Eng.A 558,701(2012).
  • 5L.Y.Lan,C.L.Qiu,D.W.Zhao,X.H.Gao,L.X.Du,Acta Metall.Sin.47,1054(2011).
  • 6M.A.Wahab,P.N.Sabapathy,M.J.Painter,J.Mater.Process.Technol.168,422(2005).
  • 7X.L.Xue,J.G.Zhu,G.E.O.Widera,Z.F.Sang,J.Press.Vessel Technol.129,72(2005).
  • 8C.W.Li,Y.Wang,Mater.Des.52,1057(2013).
  • 9V.T.Farid,M.A.Hamed,J.Appl.Sci.9,626(2009).
  • 10P.T.Jia,T.Han,Y.Wang,Trans.China Weld.Inst.34,37(2013).

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