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                预应力钢丝

                冷拉预应力钢丝用优质高碳钢盘条经表面处理后冷拔而成,钢的含碳量在0.6-0.9的范围选择,冷拔前要经过酸洗磷化或其它形式的表面处理,冷拔后横截面积一般会减少50-85%,通过冷加工硬化原理提高强度。冷拔预应力钢丝如再经稳定化处理(Stabilizing),就成为低松弛(low?relaxation)预应力钢丝,获得低松弛特性,并显眼改善屈服强度、延伸率和伸直性。预应力钢丝为直径一般在4-12毫米范围,目前中国常用5毫米和7毫米规格。
                冷拉预应应力钢丝执行*标准:GB/T5223-2002?
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