一种高耐蚀无碳Cr-Ni-Mo实心焊丝及其制备方法

By preparing high corrosion-resistant carbon-free Cr-Ni-Mo solid welding wire with extremely low carbon content, the problems of weld purity and dimensional stability were solved, achieving high strength, low-temperature toughness and excellent corrosion resistance, making it suitable for welding deep-sea and polar equipment.

CN122400902APending Publication Date: 2026-07-17CHINA SHIPBUILDING INDUSTRY CORPORATION NO725 RESEARCH INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA SHIPBUILDING INDUSTRY CORPORATION NO725 RESEARCH INSTITUTE
Filing Date
2026-06-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing welding wires cannot completely avoid carbide precipitation in extreme environments, resulting in limited weld purity and dimensional stability, insufficient strength and toughness, and alloy ratios that are not optimized for carbon-free systems, thus failing to meet the high corrosion resistance requirements of deep-sea and polar equipment.

Method used

High corrosion-resistant carbon-free Cr-Ni-Mo solid welding wire with a carbon content ≤0.001% is used. Through processes such as vacuum induction melting, AOD refining, multi-pass hot rolling and cold drawing, combined with carbon-free refractory materials, a welding wire with uniform structure and high strength and toughness is prepared. Carbon-free strengthening is achieved by relying on alloys such as nickel, molybdenum and chromium.

Benefits of technology

It achieves high strength, low-temperature toughness and excellent corrosion resistance in weld metal, making it suitable for deep-sea and polar environments. It also has excellent welding processability, contributing to the localization of high-end equipment.

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Abstract

本发明涉及焊接材料技术领域，尤其涉及一种高耐蚀无碳Cr‑Ni‑Mo实心焊丝及其制备方法。一种高耐蚀无碳Cr‑Ni‑Mo实心焊丝以Fe为基体，碳含量≤0.001%，按质量百分比计，具体合金元素组分为：C≤0.001%，Mn：0.3%‑0.8%、Si：0.1%‑0.4%、Cr：8.0%‑10.0%、Mo：3.2%‑4.0%、Ni：12.0%‑13.5%、Nb：0.1%‑0.3%、Ti：0.05%‑0.15%，余量为Fe及杂质。制备方法包括：S100、真空感应熔炼；S200、AOD 脱碳精炼；S300、多道次热轧制盘条；S400、多道次冷拔拉丝；S500、真空退火；S600、精整抛光。一种高耐蚀无碳Cr‑Ni‑Mo实心焊丝，其优势在于，焊丝具有超高强韧性，极端工况安全可控，具有良好的极致尺寸稳定性，超强耐腐蚀性，焊接工艺性优良，应用场景广泛，助力高端装备国产化。
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