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一、前言低碳螺纹钢丝是国外70年代初开发的一种新型高效建筑钢材,它是将普通低碳钢热轧圆盘条通过冷轧减轻和冷轧螺纹的冷加工强化工艺,使普通低碳钢线材的抗拉强度由380N/mm~2提高到≥550N/mm~2,而延伸率仍不低于8%。由于这种钢筋具有强度高、塑性好、与砼握裹力强等优点,因而在国外得到迅速的发展。长期以来,我国一直沿用冷拔低碳光面钢丝作为水泥制品的配筋材料。由于光面钢丝与砼间的握裹力差,在实际生产中普遍存在着钢
I. INTRODUCTION Low-carbon thread steel wire is a new type of high-efficiency construction steel developed abroad in the early 1970s. It is a cold-worked strengthening process for cold rolling and cold rolling of ordinary low-carbon steel hot-rolled discs, making ordinary low-carbon steel The tensile strength of steel wire rod increases from 380N/mm~2 to ≥550N/mm~2, and the elongation is still not less than 8%. Because of its advantages of high strength, good plasticity, and strong grip strength, it has been rapidly developed abroad. For a long time, China has been using cold-drawn low-carbon smooth steel wire as a reinforcing material for cement products. Due to the poor grip between smooth steel wire and concrete, steel is prevalent in practical production.