酸溶铝含量对低碳铝镇静钢组织性能及织构的影响

发布时间：2018-07-29 19:33

【摘要】：通过单向拉伸试验机测量两组不同酸溶铝含量低碳铝镇静钢试样的力学性能,利用光学显微镜观察其显微组织,利用电子背散射衍射仪(EBSD)观察其微观织构情况。结果表明,酸溶铝含量为0.1%的实验钢,屈服强度和抗拉强度过高,分别为257和336 MPa,而塑性应变比为0.84,几乎失去了深冲性能,而各取向织构在冶金生产过程中没有明显的密度变化,退火后有利的{111}取向织构密度仍较低;而酸溶铝含量为0.021%的低碳铝镇静钢强度较低,屈服强度和抗拉强度分别为190和282 MPa,塑性应变比为1.19,性能较为优异,且有利织构在退火后明显增加,因此实验钢的适宜酸溶铝质量分数控制在0.021%左右。
[Abstract]:The mechanical properties of two groups of low carbon aluminum killed steel samples with different acid soluble aluminum content were measured by uniaxial tensile testing machine. The microstructure was observed by optical microscope and the microstructure was observed by electron backscatter diffractometer (EBSD). The results showed that the yield strength and tensile strength of the test steel with 0.1% acid soluble aluminum were 257 and 336 MPA, respectively, and the plastic strain ratio was 0.84, which almost lost the deep drawing property. However, there was no obvious change of density in metallurgical production, and the density of {111} orientation texture was still low, while the strength of low carbon aluminum-killed steel with 0.021% acid soluble aluminum content was lower than that of low carbon aluminum-killed steel with 0.021% of acid soluble aluminum, and the density of {111} -oriented texture was still low after annealing. The yield strength and tensile strength are 190 and 282 MPa, respectively, the plastic strain ratio is 1.19, the properties are excellent, and the favorable texture increases obviously after annealing. Therefore, the suitable acid soluble aluminum mass fraction of the experimental steel is about 0.021%.
【作者单位】：江苏大学材料科学与工程学院;山东大学材料科学与工程学院;
【基金】：国家自然科学基金(51275216) 江苏大学高级人才科研启动基金(14JDG129)
【分类号】：TG142.1

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