Grain Refi ning of Flange Plate for Welded H Section Steel Made under Asynchronous Rolling Condition  

作　　者：戴辉 

机构地区：[1]Research Institute of Metallurgical Engineering,University of Science & Technology Beijing [2]Tangshan Iron & Steel Design & Research Institute Co., Ltd.,Hebei Iron & Steel Group

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2011年第6期1121-1127,共7页武汉理工大学学报（材料科学英文版）

摘　　要：Asynchronous rolling technology was adopted for the accumulated ten passes cold rolling, flange plate steel, and for welded H section steel, respectively. The metallographic microstructure analysis, tensile test and annealing test were carried out for cold rolled pieces; thus the ratio of length to width of grain, tensile strength, relationship between the grain size and asynchronous rolling process parameters after annealing can be obtained. The experimental results show that the relationship between the asynchronous rolling and the shearing deformation of rolled pieces can make a reasonable interpretation of the mechanism that asynchronous rolling may improve the strain accumulated energy of rolled pieces and the strength of flange plate steel. This paper provides a theoretical basis for the application of asynchronous rolling in improving the strength of flange plate steel.Asynchronous rolling technology was adopted for the accumulated ten passes cold rolling, flange plate steel, and for welded H section steel, respectively. The metallographic microstructure analysis, tensile test and annealing test were carried out for cold rolled pieces; thus the ratio of length to width of grain, tensile strength, relationship between the grain size and asynchronous rolling process parameters after annealing can be obtained. The experimental results show that the relationship between the asynchronous rolling and the shearing deformation of rolled pieces can make a reasonable interpretation of the mechanism that asynchronous rolling may improve the strain accumulated energy of rolled pieces and the strength of flange plate steel. This paper provides a theoretical basis for the application of asynchronous rolling in improving the strength of flange plate steel.

关 键 词：asynchronous rolling additional shear strain grain refinement 

分 类 号：TG335.1[金属学及工艺—金属压力加工]