高强度冷拉钢丝用盘条及钢丝性能研究.pdf

2013年第5期
宝钢技术
分析与研究
高强度冷拉钢丝用盘条及钢丝性能研究
赞,张忠绊,张弛
(宝山钢铁股份有限公司研究院,上海201900)
摘要;高强度冷拉钢丝是生产建筑用预应力钢绞线和桥梁缆索用镀锌钢丝的基础材料,具
有广阔的应用前景,随着技术的进步,工程建设对钢丝强度等级提出了更高的要求。对高强度
冷拉钢丝用钢的化学成分、组织,生产エ艺进行了研究。通过提高軋轧后斯太尔摩冷却速度,细
化索氏体片层结构,使得盘条强度达到1368MPa,同时面缩率达到33%,具有良好的拉拔性
能。拥有更细显微组织的高强度盘条拉拔过程中加工硬化率更高,当拉拔总压缩率达到
83.8%时,5.24钢丝强度达到2140MPa,其强度提高的同时扭转值下降并不明显,仍达到25
次,具有良好的强塑性配合。
关键词:高碳钢;斯太尔摩线;索氏体盘条;冷拉拔;高强度钢丝
中图分类号:TGI13文献标志码:B文章编号:1008-0716(2013)05-0055-04
doi:10.3969/j.isn.1008-0716.2013.05.010
High-strength wire rod and properties of cold-drawn steel wires made of it
YAO Zan, ZHANG Zhonghua and ZHANG Chi
( Research Institute, Baoshan Iron &Steel Co, Ltd, Shanghai 201900, China)
Abstract High-strength cold-drawn steel wires have been widely used to produce PC strands
and bridge cables, With the progress in technology, engineering construction demands steel wires of
higher strength. The alloying composition, microstructure and production process of high-strength
wire rod and cold-drawn steel wires made of it were investigated in this paper. By increasing the
Stelmor cooling rate and refining the lamellar sorbite, a tensile strength of 1 368 Mpa and an area
contraction rate of 33 % were obtained for the wire rod, which means that it has a good drawin
property. Wire rod with a thinner lamella structure showed a higher work-hardening rate, and the
tensile strength reached 2 140 Mpa for the ]5. 24 mm wire with a drawing rate of 83. 8%. The
torsion value of the steel wire didn't decrease obviously with the increase of strength, which suggests
that it has a good combination of strength and plasticity
Key words: high carbon steel; Stelmor line; sorbitic wire rod; cold drawing; high-strength
steel wire
预应力混凝土用钢绞线是一种新型的高效节设等方面得到广泛应用。镀锌钢丝是桥梁缆
能钢材,其抗拉强度远高于热轧钢筋,它的应用可索制造的关键材料,根据桥梁建设形式和使用部
极大地节约钢材和混凝土,使工程造价降低约位的不同可分为斜拉素用钢丝、悬索用钢丝和吊
40%,目前已在大型桥梁桥面、工业及民用预制楼杆用钢丝三类。斜拉索桥和悬索桥是目前跨江、
板、铁路枕轨、电杆、大口径高压水泥管、核电站建跨海、跨峡谷等大跨径桥梁建设的主要形式,因
此,桥梁的建设对缆索用镀锌钢丝需求量非常
姚赞博士1982年生2010年毕业于北京航空航大大学
大3?。高强度冷拉钢丝是生产高强度预应力钢
现从事金属材料硏究电话26649455
绞线和镀锌钢丝的基础,目前常用钢丝强度水平
E-mailyaozan(@baosteel.com
已达到1860MPa(3-,随着技术的进步和发展,