【摘 要】
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The differences of microstructure and property of non-quenched and tempered bainitic steel under different finish rolling temperatures was analyzed by the methods of color metallographic,scanning elec
【机 构】
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Engineering Research Institute,University of Science and Technology Beijing,100083,China
论文部分内容阅读
The differences of microstructure and property of non-quenched and tempered bainitic steel under different finish rolling temperatures was analyzed by the methods of color metallographic,scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results show that the sample with finish rolling temperature 870℃,has high yield strength,tensile strength and impact energy.Comparing with finish rolling temperature 750℃and 800℃,the sample has a higher content of bainite phase and bainitic lath is smaller at finish rolling temperature 870℃.Meanwhile,the percentage of retained austenite is 15%and retained austenite has dispersed distribution.It indicates that,when the finish rolling temperature is higher,the experimental steel has fine phase composition,microstructure distribution and excellent mechanical properties.
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