Abstract
Dynamic CCT (continuous cooling transformation) curves and efects of microstructures and M/A islands of X100 hot roled strip on mechanical properties were studied by means of a thermal simulator, a scanning electron microscope (SEM), a transmission electron microscope (TEM), a digital micro-hardness tester and Image-Pro Plus analysis software. The results show that high contents of C and Mo can make transformation lines of acicular ferrite and bainite shift rightward. High Mo tested strip has higher strength and microGhardness and lower toughness than the other one because lath bainite appears instead of quasi-polygonal ferrite. Tested strip with granular bainite, lath bainit M/A islands has beter mechanical properties and in the microstructures lath bainite content is around 36.5% and M/A islands ar fine and disperse in the matrix.
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Foundation Item: Item Sponsored by National Key Technology Research and Development Program in 12th Five-year Plan of China (2011BAE35B01)
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Duan, Ln., Chen, Y., Liu, Qy. et al. Microstructures and Mechanical Properties of X100 Pipeline Steel Strip. J. Iron Steel Res. Int. 21, 227–232 (2014). https://doi.org/10.1016/S1006-706X(14)60035-2
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DOI: https://doi.org/10.1016/S1006-706X(14)60035-2