论文部分内容阅读
通过对Ti-IF钢热镀铝锌板的冷轧和退火,获得了不同变形程度的板料。利用光学显微镜、显微硬度仪和拉伸试验机分别对变形后的钢板进行了显微组织观察、显微硬度测试和力学性能测试,研究了轧制变形量对钢板组织和性能的影响。结果表明:随着轧制变形量的增加,钢的组织逐步被纤维化。当轧制变形量在0%~10.7%时,材料屈服强度快速上升,但抗拉强度变化不大,伸长率下降和显微组织变化不明显;当轧制变形量在10.7%~75%时,屈服强度和抗拉强度均随着变形量增加而增加,伸长率逐渐下降;当轧制变形量在10.7%~30.1%时,伸长率快速从29.7%下降到5.6%;当变形量在1.8%~10.7%时,变形Ti-IF钢表层显微硬度大于心部,说明表层晶粒优先被加工硬化。
Through the cold-rolled and annealed Ti-IF hot-dip galvanized sheets, different deformations were obtained. The microstructures, microhardness and mechanical properties of the deformed steel sheets were investigated by optical microscopy, microhardness tester and tensile tester respectively. The effects of rolling deformation on the microstructure and properties of the steel sheets were investigated. The results show that with the increase of rolling deformation, the microstructure of steel is gradually fiberized. When the rolling deformation is between 0% and 10.7%, the yield strength of the material increases rapidly, but the tensile strength does not change much, the elongation decreases and the microstructure does not change obviously. When the rolling deformation is between 10.7% and 75% , The yield strength and tensile strength both increase with the increase of the deformation and the elongation decreases gradually. When the rolling deformation is from 10.7% to 30.1%, the elongation decreases rapidly from 29.7% to 5.6% When the amount is 1.8% ~ 10.7%, the microhardness of the deformed Ti-IF steel surface is greater than that of the heart, indicating that the surface grains are preferentially hardened.