Microstructure of Coarse-grained Heat Affected Zone of Zr Microalloyed HSLA Steel

XI Tian-hui; CHEN Xiao; LI Jun-feng; CHEN Yan-tang; GUO Ai-ming; BU Yong

Materials and Mechanical Engineering > 2006 > 30(11): 77-80.

XI Tian-hui, CHEN Xiao, LI Jun-feng, CHEN Yan-tang, GUO Ai-ming, BU Yong. Microstructure of Coarse-grained Heat Affected Zone of Zr Microalloyed HSLA Steel[J]. Materials and Mechanical Engineering, 2006, 30(11): 77-80.

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Microstructure of Coarse-grained Heat Affected Zone of Zr Microalloyed HSLA Steel

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Received Date: October 11, 2006

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Microstructure of simulated coarse grain heat affected zone (CGHAZ) of Zr Microalloyed HSLA Steel are investigated using optical microscopy and transmission electron microscopy.The austenite grain size of simulated CGHAZ increases with the increase of weld heat input.The grain size of simulated CGHAZ without Zr treatments is larger while that of Zr treated are smaller after same heat input welding.The microstructure of simulated CGHAZ consist of bainite mainly after 30kJ/cm heat input weld.The amount of the M-A constituent gets less and ferrite and pearlite appear with the increase of weld heat input.The inclusions are changed from chain shape with acute angle to spherical shape.Those are complex inclusions with the Zr containing inclusions are the nuclei for the inclusions,Al2O3 and / or MnS are located in the surface layer of the inclusions whose size is in the range of 10 to 3.0 μm.
- zirconium,
- coarse grain heat affected zone,
- microstructure

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[1]	Takamura J,Mizoguchi S.Roles of oxides in steels performance[A].Proc.6th.Int.Iron and Steel Cong[C].Tokyo:ISIJ,1990.
[2]	SHIM Jse-Hyeok,BYUN Jung-Soo.Hot deformation and acicular ferrite microstructure in C-Mn steel containing Ti2O3 inclusions[J].ISIJ International,2000,(8):819-823.
[3]	PARK Ji-Yong,PAK J K,CHOO W Y.Effect of Ti addition on the potency of MnS for ferrite nucleation in C-Mn-V steels[J].ISIJ International,2000,(12):1253-1259.
[4]	Hitchcock W N,Copeland W D.The effect of Al and Ti on the hardenbility,tensile properties and impact toughness of boron-treated plate steel tempered at 620 ℃[J].Speich Symposium Proceedings,1992,(7):247-256.
[5]	Bang K S,Jeong H S.Effect of nitrogen content on simulated heat affected zone toughness of titanium containing thermomechanically controlled rolled steel[J].Materials Science and Techology,2002,(6):649-654.
[6]	Thomas R.Free energy of formation of binary compounds[M].USA:M I T Press,1971.
[7]	习天辉,陈晓,李平和,等.Zr含量对微合金钢组织和性能的影响[J].武汉科技大学学报,2003,(4):339-342.
[8]	王笑天.金属材料学[M].北京:机械工业出版社,1987.
[9]	翁宇庆.超细晶钢[M].北京:冶金工业出版社,2003.
[10]	杜则裕,张德勤,田志凌.低碳低合金钢焊缝金属的显微组织及其影响因素[J].钢铁,1999,10(增刊):67-70.
[11]	张文钺.焊接物理冶金[M].天津:天津大学出版社,1991.
[12]	Takashi SAWAI,Masamitsu WAKOH,Yoshiyuki UESHIMA,et al.Analysis of oxide dispersion during solidification in Ti,Zr-deoxidized steels[J].ISIJ International,1992,(1):169-173.
[13]	GUO Chang Jiang,YU Ru Zhu,SHU Qiang Guo,et al.The existence of intragranular fettite plates and nucleating inclusions in the heat affected zone of X-60 pipe steel[J].Journal of Materials Science,1997,32:2985-2989.

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