论文部分内容阅读
预应力混凝土用高强度钢丝(简称预应力钢丝)是用优质碳素钢盘条加热至850～950℃,并经500～600℃的铅浴淬火,然后经过酸洗冷拔而成。预应力钢丝按交货状态分冷拉与矫直回火两种。预应力钢丝经过矫直回火后,可消除钢丝冷拔中产生的残余应力,提高钢丝的比例极限、屈服强度和弹性模量,并改善塑性;同时解决钢丝的伸直性,方便施工。在先张法构件中为保证高强度钢丝与混凝土的可靠粘结,钢丝的表面需要经过刻痕处理。预应力混凝土用高强度钢绞线(简称预应力钢绞线)是在绞线机上以一根钢丝为中心,其余钢丝围绕其进行螺旋状绞合,再经低
Prestressed concrete high-strength steel wire (abbreviated as prestressed steel wire) is heated to 850-950°C by high-quality carbon steel wire rod, quenched by a lead bath at 500-600°C, and then cold-drawn by pickling. Prestressed steel wire according to the delivery status of cold drawn and straightened tempered two. After the straightening and tempering of the prestressed steel wire, the residual stress generated in the cold drawing of the steel wire can be eliminated, and the proportional limit, the yield strength and the elastic modulus of the steel wire can be increased, and the plasticity can be improved. At the same time, the straightness of the steel wire can be solved to facilitate the construction. In order to ensure the reliable bonding of high-strength steel wire and concrete in the pre-tensioned components, the surface of the steel wire needs to be scored. Prestressed concrete high-strength steel strands (abbreviated as prestressed steel strands) are centered on a wire at the stranding machine, and the remaining steel wires are spirally twisted around them and then low