The microstructure and the characteristics of the inclusions embedded in ferrite matrix in simu lated coarse-grain heat affected zone (CGHAZ) of a Ti-Zr-treated high strength low alloy (HSLA) steel have been investigated. The microstructure of the simulated CGHAZ dominantly consisted of intragranular acicular ferrite (IAF) combining with a small amount of polygonal ferrite (PF), widmanstatten ferrite (WF), bainite ferrite (BF), pearlite and martensite-austenite (M-A) islands. The PF, WF and BF were generally observed at the prior austenite grain boundaries and the interlocking acicular ferrite was usually found intragranularly. It was found that the inclusions were composed of Ti2O3, ZrO2 Al2O3 locating at the center of the particles and MnS lying on the surface layer of the inclusions. The intragranular complex inclusions prornoted the acicular ferrite formation and the refinement of microstructure whilst those at prior austenite grain boundaries caused PF formation on the inclusions. The simulated CGHAZ con sisting of such complicated microstructure exhibited desired mechanical properties.
参考文献
| [1] | R J Hattingh;G Pienaar.[J].International Journal of Pressure Vessels and Piping,1998:661. |
| [2] | Y.LI;D.N.CROWTHER;M.J.W.GREEN .The Effect of Vanadium and Niobium on the Properties and Microstructure of the Intercritically Reheated Coarse Grained Heat Affected Zone in Low Carbon Microalloyed Steels[J].ISIJ International,2001(1):46-55. |
| [3] | K Yamamoto;T Hasegawa;J I Takamura.[J].ISIJ International,1996(01):80. |
| [4] | S St-Laurent;G L'Espérance.[J].Materials Science and Engineering A:203. |
| [5] | T K Lee;H J Kim;B Y Kang;S K Hwang.[J].ISIJ International,2000(12):1260. |
| [6] | K He;D V Edmonds.[J].Materials Science and Technology:289. |
| [7] | J.-L. LEE;Y.-T. PAN .The formation of intragranular acicular ferrite in simulated heat-affected zone[J].ISIJ International,1995(8):1027-1033. |
| [8] | Y Horii;M Wakabavashi;S Ohkita;M Namura .Nippon Steel Technical Report No. 37[R].UDC 621.791.011.539.56,Nippon Steel Co.,Tokyo,1988. |
| [9] | M. HAMADA;Y. FUKADA;Y. KOMIZO .Microstructure and precipitation behavior in heat affected zone of C-Mn microalloyed steel containing Nb, V and Ti[J].ISIJ International,1995(10):1196-1202. |
| [10] | M Enomoto.Encyclopedia of Materials: Science and Technology[M].Elsevier science Publisher Amsterdam,2001:6393. |
| [11] | M Enomoto;N Maruyama;K M Wu;T Tarui,#.[J].Materials Science and Engineering:151. |
| [12] | J I Takamura;S Mizoguchi;H Saka.Proc. of the 6th International Iron and Steel Congress[C].Nagoya,ISIJ,1990:591. |
| [13] | F J Barbaro;P Krauklis;K E Easterling.[J].Materials Science and Technology:1057. |
| [14] | H.Mabuchi .The Role of Mn Depletion in Intra-Granular Ferrite Transformation in the Heat Affected Zone of Welded Joints with Large Heat Input in Structural Steels[J].ISIJ International,1996(11):1406-1412. |
| [15] | K J He;T N Baker.[J].Materials Science and Engineering:57. |
| [16] | T Sawai;M Wakoh;Y Ueshima;S Mizoguchi.[J].ISIJ International,1992(01):169. |
| [17] | D V Edmonds;R C Cochrane.[J].Metallurgical and Materials Transactions:1527. |
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