A high weathering resistance steel with yield strength ≥ 235mpa and its manufacturing method

By optimizing the chemical composition of high weather-resistant steel and using controlled rolling and cooling technology, the problem of galvanizing steel in the wire mesh industry has been solved, achieving coating-free and long-term corrosion-resistant effects, reducing costs and simplifying the processing flow.

CN122406103APending Publication Date: 2026-07-17武汉钢铁有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武汉钢铁有限公司
Filing Date
2026-05-06
Publication Date
2026-07-17

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Abstract

本发明公开了一种屈服强度≥235MPa高耐候钢，化学成分按重量百分比计为：C：0.05～0.10wt%、Si：0.3～0.6wt%、Mn：＜0.12wt%、P：0.035～0.095wt%、S＜0.025wt%、Cu：0.1～0.5wt%、Cr：1.0～2.0wt%，其余为Fe及不可避免的杂质；制造方法包括钢坯加热工序、轧制工序、风冷工序；其中，轧制工序确保入精轧温度为950±10℃，入减定径温度940±10℃，吐丝温度930±10℃；风冷工序采用斯太尔摩工艺控制冷却，保温盖、风机全关，确保出保温盖温度＞600℃；本发明采取全新的超级耐腐蚀成分体系，配合控轧控冷技术方案，在满足耐腐蚀性能的基础上形成利于拉拔、冷加工的微观组织，有望改变现有拉丝材用钢现状，实现下游加工流程的简化（免涂镀）和应用端的免维护，降低下游用户全流程采购成本。
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