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本研究在实验室和生产条件下,全面比较了高硫稀土蠕铁和低硫稀土蠕铁的金相组织(尤其是薄壁部分的金相组织)、白口倾向、断面敏感性、强度性能、蠕化衰退倾向。并以轨道车变速箱壳体蠕铁件的研制作为试验结果的佐证。高硫原铁水制成的稀土蠕铁具有白口倾向小、断面敏感性小、在薄壁处易获得高蠕化率(φ10mm可达60—70％)的优点,但是抗弯、抗拉强度稍低,衰退要快一些。这些试验结果对全面认识高硫蠕铁的特性有一定的参考价值。
In this study, laboratory and production conditions, a comprehensive comparison of the high-sulfur rare earth vermiculite and low-sulfur rare earth vermiculite microstructure (especially the thin-walled part of the microstructure), white mouth tendency, section sensitivity, strength properties , Vermicular decay tendency. And railway railroad gear box housing parts of the development of iron as evidence of test results. The rare earth vermiculite made from high-sulfur raw hot metal has the advantages of small whiteness tendency, small cross-sectional sensitivity, easy to obtain high creep rate (up to 60-70% of φ10mm) at the thin wall, but the bending and tensile strength Slightly lower, recession faster. These test results have a certain reference value for fully understanding the characteristics of high-sulfur vermicular iron.