搅拌摩擦加工IF钢的组织性能
发布时间：2019-06-22 16:57
【摘要】：对3 mm厚的DC04冷轧IF钢板进行搅拌摩擦加工,研究加工区域的微观组织与力学性能.在旋转速度为950 r·min-1,加工速度为60 mm·min-1时,采用加工后强制冷却技术可获得光滑平整且没有缺陷的加工表面.搅拌摩擦加工后组织显著细化,加工中心的平均显微硬度约为HV 135.6,是母材硬度的1.4倍,表面细晶层硬度最高可达到HV 312.8,细晶层和过渡层的抗拉强度分别比母材的抗拉强度提高50.9%和47.6%,加工前后试样的拉伸断口均呈微孔聚合韧性断裂特征.细晶强化对材料抗拉强度的提高起主要作用.
[Abstract]:The friction stir processing of DC04 cold rolled IF steel plate with 3 mm thickness was carried out, and the microstructure and mechanical properties of the machining area were studied. When the rotating speed is 950r 路min-1 and the machining speed is 60 mm 路min-1, a smooth and undefective machined surface can be obtained by forced cooling after machining. The average microhardness of the machining center is about 135.6, which is 1.4 times of that of the base metal, and the highest hardness of the surface fine grain layer is up to HV 312.8. The tensile strength of the fine grain layer and the transition layer is 50.9% and 47.6% higher than that of the base metal, respectively. the tensile fracture of the samples before and after processing shows the characteristics of microporous polymerization toughness fracture. Fine grain strengthening plays a major role in improving the tensile strength of materials.
【作者单位】： 西安建筑科技大学冶金工程学院;西部钛业有限责任公司;
【基金】：国家自然科学基金联合基金资助项目(U1360105)
【分类号】：TG457.11
[Abstract]:The friction stir processing of DC04 cold rolled IF steel plate with 3 mm thickness was carried out, and the microstructure and mechanical properties of the machining area were studied. When the rotating speed is 950r 路min-1 and the machining speed is 60 mm 路min-1, a smooth and undefective machined surface can be obtained by forced cooling after machining. The average microhardness of the machining center is about 135.6, which is 1.4 times of that of the base metal, and the highest hardness of the surface fine grain layer is up to HV 312.8. The tensile strength of the fine grain layer and the transition layer is 50.9% and 47.6% higher than that of the base metal, respectively. the tensile fracture of the samples before and after processing shows the characteristics of microporous polymerization toughness fracture. Fine grain strengthening plays a major role in improving the tensile strength of materials.
【作者单位】： 西安建筑科技大学冶金工程学院;西部钛业有限责任公司;
【基金】：国家自然科学基金联合基金资助项目(U1360105)
【分类号】：TG457.11
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