以管线钢X52为研究对象,在Gleeble 1500热模拟机上,进行了奥氏体未再结晶区不同形变速度、形变量和冷却速度对X52的相变行为及显微组织影响的研究.通过光学显微镜、扫描电镜分析可以发现,随变形速率、形变量和冷却速度的增加,晶粒明显变细.同时,低碳钢不同的是在奥氏体未再结晶区轧制时,第二相的析出可以抑制再结晶,并且析出物的存在不仅阻碍位错的运动,而且会造成位错的增殖,因而微合金钢细化晶粒的机理主要有:形变诱导铁素体、铁素体的动态再结晶和第二相的析出抑制晶粒长大使晶粒细化.
参考文献
| [1] | Sato A.Research Project on Innovative Steels in Japan (STX21 Project)[A].Tsukuba,Japan,2000:1-10. |
| [2] | Lee WP.Development of High Perforrmance Sturctural Steels for 21st Century[A].Tsukuba,Japan,2000:33-63. |
| [3] | R. HICKSON .The Effect of Chemistry on the Formation of Ultrafine Ferrite in Steel[J].ISIJ International,1999(11):1176-1180. |
| [4] | HicksonMR;Gibs R K;Hodgson P D .Effect of preroll quendching and post-roll quenching on production and properties of ultra-fine ferrite in steels[J].Materials Science and Technology,1995,15(01):85-90. |
| [5] | Matsumura Y;Yada H .Evolution of ultrafine-grainer ferrite in hot stuccessive deformation[J].Transactions of the Iron and Steel Institute of Japan,1987,27:492. |
| [6] | Lee S;Kwon D;Lee Y K et al.Transformation strengthening by thermomechanical treatment in C-Mn-Ni-Nb steels[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,26(05):1093-I100. |
| [7] | 柳得橹;林昌;傅杰 等.高纯净微合金钢的连续冷却转变与组织细化[J].金属学报,1999,35(09):923-927. |
| [8] | D.Q.Bai S.Yue .Effect of Deformation and Cooling Rate on the Microstructures of Low Carbon Nb-B Steels[J].ISIJ International,1998(4):371-379. |
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