论文部分内容阅读
Effect of RE-N on the solidification microstructures of Fe-B-Ti alloy containing 0.3%C, 2.0%B, and 1.0%(mass fraction)Ti was investigated by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD) analysis. The results indicate that the solidification microstructures of Fe-B-Ti alloy consist of Fe2B, TiB2, pearlite, ferrite and martensite. The shape of Fe2B is continuous and netlike. TiB2 is distributed in the form of independent blocks. The amount of TiB2 is obviously less than that of Fe2B. After modification with RE-N, the grain and eutectic structure of Fe-B-Ti alloy refine obviously and the distribution of the borides is homogeneous. The borides are still Fe2B and TiB2 in the modified Fe-B-Ti alloy and there are many obvious necking and broken net in the borides. The reason why RE-N changes the morphology and distribution of borides was particularly discussed.
Effect of RE-N on the solidification microstructures of Fe-B-Ti alloy containing 0.3% C, 2.0% B and 1.0% mass fraction Ti was investigated by optical microscopy (OM), scanning electron microscopy The results indicate that the solidification microstructures of Fe-B-Ti alloy consist of Fe2B, TiB2, pearlite, ferrite and martensite. The shape of Fe2B is continuous (disperse X-ray spectrometry TiB2 is distributed in the form of independent blocks. The amount of TiB2 is obviously less than that of Fe2B. After modification with RE-N, the grain and eutectic structure of Fe-B-Ti alloy refine obviously and the distribution of the borides are still Fe2B and TiB2 in the modified Fe-B-Ti alloy and there are many obvious necking and broken net in the borides. The reason why RE-N changes the morphology and distribution of borides were classified .