攪拌摩擦加工IF鋼的組織性能
發(fā)布時間:2019-06-22 16:57
【摘要】:對3 mm厚的DC04冷軋IF鋼板進行攪拌摩擦加工,研究加工區(qū)域的微觀組織與力學性能.在旋轉速度為950 r·min-1,加工速度為60 mm·min-1時,采用加工后強制冷卻技術可獲得光滑平整且沒有缺陷的加工表面.攪拌摩擦加工后組織顯著細化,加工中心的平均顯微硬度約為HV 135.6,是母材硬度的1.4倍,表面細晶層硬度最高可達到HV 312.8,細晶層和過渡層的抗拉強度分別比母材的抗拉強度提高50.9%和47.6%,加工前后試樣的拉伸斷口均呈微孔聚合韌性斷裂特征.細晶強化對材料抗拉強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.
【作者單位】: 西安建筑科技大學冶金工程學院;西部鈦業(yè)有限責任公司;
【基金】:國家自然科學基金聯(lián)合基金資助項目(U1360105)
【分類號】: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.
【作者單位】: 西安建筑科技大學冶金工程學院;西部鈦業(yè)有限責任公司;
【基金】:國家自然科學基金聯(lián)合基金資助項目(U1360105)
【分類號】:TG457.11
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