文章信息/Info

Title:

Research Status and Development Tendency of Ultra-High Strength Steel Wire for Bridge Cables

文章編號:

1674-3962(2020)05-0395-09

作者:

馮路路1; 2; 4; 吳開明1; 魯修宇3; 喬文瑋4

（1. 武漢科技大學 國際鋼鐵研究院，湖北 武漢 430081）（2. 荊楚理工學院機械工程學院，湖北 荊門 448000）（3. 武漢鋼鐵（集團）研究院，湖北 武漢 430080）（4. 江蘇華能電纜股份有限公司，江蘇 高郵 225613）

Author(s):

FENG Lulu1; 2; 4;  WU Kaiming1;  LU Xiuyu3;  QIAO Wenwei4

(1. International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China) (2. School of Mechanical Engineering, Jingchu University of Technology, Jingmen 448000, China) (3. Research Institute of Wuhan Iron & Steel Group, Wuhan 430080, China) (4. Jiangsu Huaneng Cable Co., Ltd., Gaoyou 225613, China)

關(guān)鍵詞:

橋梁纜索用鋼絲; 超高強度; 扭轉(zhuǎn)性能; 微觀組織; 滲碳體

Keywords:

bridge cable steel wire;  ultra-high strength;  torsional property;  microstructure;  cementite

分類號:

TU511.3；U443.38

DOI:

10.7502/j.issn.1674-3962.201904017

文獻標志碼:

A

摘要:

隨著橋梁建設(shè)向跨海、跨江、跨越大灣區(qū)以及跨越高山峽谷的方向發(fā)展，懸索橋和斜拉橋的跨度越來越大，對橋梁纜索用鋼絲的要求也越來越高。橋梁纜索用鋼絲的微觀結(jié)構(gòu)具有雙層復合結(jié)構(gòu)，由滲碳體片層和鐵素體片層相互間隔組成，滲碳體片層決定其強度，鐵素體片層決定其塑韌性，二者層間距的大小對其強韌性配比尤為重要。首先論述了國內(nèi)外橋梁建設(shè)的發(fā)展以及橋梁纜索用超高強度鋼絲的國內(nèi)外生產(chǎn)與研究現(xiàn)狀；然后討論了橋梁纜索用超高強度鋼絲的微觀組織與宏觀力學性能之間的關(guān)系，分析了其強韌化機理以及國內(nèi)外熱處理技術(shù)的優(yōu)缺點。盤條的原始抗拉強度和冷拉拔加工過程中的形變量共同決定了冷拉拔鋼絲的最終抗拉強度，在冷拉拔過程中組織形貌變化和累計的形變能是造成熱鍍鋅過程中鋼絲扭轉(zhuǎn)性能降低的關(guān)鍵因素。橋梁纜索用超高強度鋼絲存在的不足主要是缺乏與更高強度盤條相匹配的成分設(shè)計和熱處理技術(shù)，及缺乏防止鋼絲在熱鍍鋅過程中扭轉(zhuǎn)性能降低的先進冷拉拔加工技術(shù)。

Abstract:

With the development of bridge construction in the direction of sea-crossing, river-crossing, bay-crossing and mountain-crossing, the requirement of bridge cable steel wire is higher since the span of suspension bridges and cable-stayed bridges is getting larger. The double-layer composite microstructure of bridge cable steel wire is composed of cementite lamellae and ferrite lamellae with certain intervals. And, the strength and plasticity�瞭oughness of bridge cable steels are depended on cementite lamellae and ferrite lamellae, respectively. The distance between two lamella is particularly important for the strength and toughness of bridge cable steels. Firstly, the production and research status of ultra-high strength steel wire（UHSSW) for bridge cables worldwide was reviewed in this paper, as well as the development of bridge construction. Moreover, the relationship between microstructure and mechanical properties of UHSSW for bridge cables was discussed. Its strengthening-toughening mechanism was analyzed. The advantages and disadvantages of heat treatment technology being applied on UHSSW for bridge cables were also analyzed. The final tensile strength of cold drawing steel wire is determined by both original tensile strength of wire rod and deformation during cold drawing process. The microstructure variation and accumulated deformation energy during cold drawing process are the key factors for reducing torsional property of steel wire in hot�瞕ip galvanizing process. Meanwhile, the shortcomings of UHSSW for bridge cables were pointed out. These are lack of composition design and heat treatment technology matching higher strength wire rod, and advanced cold drawing technology for preventing the torsional property degradation of steel wire during hot-dip galvanizing.