A steel wire rod for an ultra-high strength nitrogen-containing card clothing and a manufacturing method thereof

By introducing nitrogen to replace some alloying elements in steel wire for needle cloth, and combining this with precise process control, the problem of manufacturing high-strength, high-wear-resistant, and low-cost steel wire has been solved, achieving high-strength and low-cost production results.

CN122406115APending Publication Date: 2026-07-17JIANGYIN XINGCHENG GOLD MATERIALS CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGYIN XINGCHENG GOLD MATERIALS CO LTD
Filing Date
2026-04-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to provide high-strength, high-wear-resistance, and low-cost steel wire for carding without increasing costs. In particular, the addition of alloying elements in traditional methods leads to high production costs and insufficient tensile strength of the resulting wire rods, which cannot meet the needs of modern carding machines.

Method used

By introducing nitrogen to replace some expensive alloying elements, combined with precise process control, the chemical composition and manufacturing process are optimized, including steps such as converter smelting, nitrogen control in refining, continuous casting and rolling cooling, to ensure uniform chemical composition and optimized microstructure. The use of a range-based Stellmore cooling process improves the strength and drawing performance of the steel wire.

Benefits of technology

It achieves a tensile strength of over 1280MPa in wire rod without increasing costs, meeting the wear resistance requirements of high-speed carding machines, and eliminating the need for annealing treatment, thus reducing production costs and providing excellent surface and internal quality.

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Abstract

本发明公开了一种超高强含氮针布用钢线材及其制造方法，属于铁基特种线材技术领域。该线材化学成分质量百分比为：C：0.85%‑0.95%，Mn：0.30%‑0.60%，Si：0.10%‑0.40%，P≤0.025%，S≤0.025%，Cr：0.10%‑0.30%，Nb：0.01%‑0.05%，V：0.05%‑0.50%，N：0.01%‑0.05%，O≤0.005%，其余为 Fe 及不可避免的杂质。制造方法包括转炉冶炼 ‑ 精炼控氮 ‑ 低过热度连铸 ‑ 高温扩散开坯 ‑ 高线轧制 ‑ 区间式斯泰尔摩冷却。本发明通过氮元素替代部分合金元素，结合精确的工艺控制，使 φ5.5mm 热轧盘条抗拉强度达 1280‑1350MPa，面缩率 32%‑45%，索氏体比例≥90%，脱碳层深度≤0.02mm，中心偏析≤1 级，网状渗碳体≤2 级，具有高强度、高耐磨性、低成本的优点，可满足现代高转速梳理机的使用要求。
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