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研究了低碳铝镇静钢08Al中单独添加硼、钛和同时添加硼、钛对其组织和力学性能的影响,结果显示,在相同控轧控冷工艺条件下,单独添加微量硼对盘条的屈服强度和抗拉强度影响不大,单独添加质量分数0.057%的钛可使盘条屈服强度和抗拉强度升高约20 MPa,同时添加质量分数为0.004 8%的硼和质量分数为0.07%的钛可使盘条屈服强度和抗拉强度显著提高,试验中,屈服强度由260升高到316 MPa,提高了56 MPa,抗拉强度由363升高到463 MPa,提高了100 MPa。同时添加硼和钛使强度提高的原因主要是由于获得了具有高位错密度的不规则的准多边形铁素体,同时细片层珠光体相变强化对该钢强度的升高也有一定贡献。
The effects of addition of boron and titanium and simultaneous addition of boron and titanium on the microstructure and mechanical properties of the low carbon aluminum killed steel 08Al were investigated. The results show that under the same controlled rolling and controlled cooling conditions, Yield strength and tensile strength have little effect. Adding 0.057% titanium alone can increase the yield strength and tensile strength of the wire rod by about 20 MPa, adding 0.004 8 mass% boron and 0.07% Of titanium can significantly improve the yield strength and tensile strength of the wire rod. In the test, the yield strength increased from 260 to 316 MPa, 56 MPa increased, and the tensile strength increased from 363 to 463 MPa, an increase of 100 MPa. The reason why the addition of boron and titanium at the same time increase the strength is mainly due to the irregular quasi-polygonal ferrite with high dislocation density, and the enhancement of the pearlite transformation by fine lamellar layer also contributes to the increase of the strength of the steel.