脱碳对2100 MPa级V微合金化桥梁缆索钢丝力学性能的影响

苏启豪; 亓海全; 李新茹; 李腊梅; 杨子康; 谢盈盈; 姚小凤; 周忠成

doi:10.7513/j.issn.1004-7638.2025.06.019

脱碳对2100 MPa级V微合金化桥梁缆索钢丝力学性能的影响

doi: 10.7513/j.issn.1004-7638.2025.06.019

苏启豪^{1, 2,},
亓海全^{1, 2, ,},
李新茹^{1, 2},
李腊梅^{1, 2},
杨子康^{1, 2},
谢盈盈^{1, 2},
姚小凤^{1, 2},
周忠成³

1.
桂林理工大学材料科学与工程学院, 广西桂林541004
2.
广西光电材料与器件重点实验室, 广西桂林541004
3.
江苏应流机械制造有限责任公司, 江苏盐城224400

基金项目: 广西科技计划项目(桂科AD25069100)。

详细信息

作者简介:
苏启豪，2001年出生，男，河北邢台人，硕士研究生，主要从事先进钢铁材料研究，E-mail：jinzhikuye22333@163.com

通讯作者:
亓海全，1981年出生，男，山东莱芜人，副教授，主要从事钢铁材料与热处理研究，E-mail：alexander_qi@163.com

中图分类号: TG142.1
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- 文章访问数: 30
- HTML全文浏览量: 17
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2025-08-15
- 录用日期: 2025-12-05
- 修回日期: 2025-12-04
- 网络出版日期: 2025-12-31
- 刊出日期: 2025-12-31

The influence of decarburization on the mechanical properties of 2100 MPa grade V microalloyed bridge cable steel wire

SU Qihao^{1, 2
,},
QI Haiquan^{1, 2
, ,},
LI Xinru^{1, 2},
LI Lamei^{1, 2},
YANG Zikang^{1, 2},
XIE Yingying^{1, 2},
YAO Xiaofeng^{1, 2},
ZHOU Zhongcheng³

1.
School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
2.
Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin 541004, Guangxi, China
3.
Jiangsu Yingliu Machinery Manufacturing Co., LTD, Yancheng 224400, Jiangsu, China

摘要

摘要: 为了量化脱碳层对超高强缆索钢丝力学性能的影响，系统研究了2100 MPa级V微合金化镀锌铝缆索钢丝的径向硬度分布、脱碳层深度及逐层剥离脱碳层后钢丝的力学性能。结果表明：①钢丝基体的径向硬度由表及里呈规律性提高，硬度(HV)最外层为601，心部为678，硬度数据证实钢丝的实际脱碳层深度可达(150±10) μm；②钢丝镀锌铝层厚度约为30 μm，镀锌铝层降低钢丝强度为11.17 MPa，对钢丝强度影响较小；③逐层剥离脱碳层后，钢丝基体的强度由2134.04 MPa增至2225.97 MPa，脱碳层使钢丝强度降低91.93 MPa，剥离140 μm后强度趋于稳定。由数据可知，脱碳层明显降低了缆索钢丝的整体强度，故严格控制盘条脱碳是开发超高强缆索钢丝的重要环节。
- 缆索钢丝 /
- 脱碳 /
- 钒 /
- 力学性能 /
- 硬度分布
Abstract: To quantify the influence of decarburization layers on the mechanical properties of ultra-high strength cable steel wires, in this paper the radial hardness distribution, decarburization layer depth and mechanical properties of 2100 MPa grade V microalloyed zinc-aluminum cable steel wires after layer-by-layer stripping of decarburization layers had been systematically studied. The results show that the radial hardness of the steel wire substrate increases regularly from the surface to the core, with the hardness (HV) being 601 at the outermost layer and 678 at the core. The hardness data confirm that the actual decarburization layer depth of the steel wire can reach (150±10) μm. The thickness of achieved zinc-aluminum coating on the steel wire is approximately 30 μm, which reduces the steel wire's strength by 11.17 MPa, indicating a minor impact on the steel wire's strength. After the layer-by-layer removal of the decarburized layer, the strength of the steel wire substrate increases from 2134.04 MPa to 2225.97 MPa. The decarburized layer reduces the steel wire's strength by 91.93 MPa, and the strength tends to stabilize after removing a 140 μm layer. It can be seen from the data that the decarburization layer significantly reduces the overall strength of the cable steel wire. Therefore, well controlling the decarburization of the wire rods is an important factor in the development of ultra-high strength cable steel wire.
- cable steel wire /
- decarburization /
- vanadium /
- mechanical properties /
- hardness distribution

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图 1 拉伸试样实物

Figure 1. Physical drawing of the tensile specimen

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图 2 2100 MPa级钢丝显微组织

(a)(a1)(b)(b1)光学显微组织；(c)(c1)(d)(d1)SEM显微组织; 边部：(a)(c)横截面；(a1)(c1)纵截面；心部：(b)(d)横截面；(b1)(d1)纵截面

Figure 2. Optical microstructure of 2100 MPa grade steel wire

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图 3 2100 MPa级钢丝镀层附近EDS成分分析

(a)钢丝镀层附近SEM显微组织；(b)EDS成分分析结果

Figure 3. EDS analysis on the surface near the coating of 2100 MPa grade steel wire

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图 4 2100 MPa钢丝显微硬度分布

(a)钢丝表面、1/2半径处、心部显微硬度分布；(b)钢丝脱碳部位显微硬度分布

Figure 4. Microhardness distribution of 2100 MPa steel wire

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图 5 拉伸试样断口形貌

(a)(a1)(a2)(a3)试样A；(b)(b1)(b2)(b3)试样B；(c)(c1)(c2)(c3)试样C；(d)(d1)(d2)(d3)试样D；(e)(e1)(e2)(e3)试样E；(f)(f1)(f2)(f3)试样F

Figure 5. Fracture surface morphology of tensile specimen

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表 1 钢丝的化学成分

Table 1. Chemical composition of steel wire %

C	Si	Mn	Cr	V	Al	P	S	Fe
0.98	1.24	0.73	0.31	0.05	0.02	0.009	0.002	Bal.

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表 2 不同剥层深度下钢丝的力学性能

Table 2. Mechanical properties of steel wire at different delamination depths

Specimen number	Delamination depth /μm	Tensile strength /MPa	Percentage elongation /%	Reduction of area /%
A	0	2122.87	9.6	39.0
B	30	2134.04	9.5	39.4
C	70	2195.81	9.0	35.2
D	140	2223.72	8.3	34.6
E	210	2225.97	8.3	34.6
F	280	2220.75	7.5	34.2

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