Phase transformation behavior of the SMA490BW weathering steel |
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| Authors: | Da Li Yuan Nie Guoqing Gou Yan Liu Yonghui Zhu Qiuying Wang |
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| Institution: | Material Science and Engineer, Southwest Jiaotong University , Chengdu 610031 , China |
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| Abstract: | In order to optimize the heat treatment schedule and the welding procedure of the SMA490BW weathering steel, a precise determination of the continuous cooling transformation and simulated heat affected zone continuous cooling transforming diagrams were carried out. Meanwhile, the hardnesses of the specimens with different cooling rates were measured and the microstructures were observed. The microstructures are composed of pearlite, polygonal ferrite, granular structure, acicular ferrite, and lath bainite depending on the cooling rates and transformation temperature. The experiment results provide a useful guide for the heat treatment and welding of this steel. |
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| Keywords: | continuous cooling transformation diagram microhardness microstructure simulated heat affected zone continuous cooling transforming diagram weathering steel |
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