一种具有高表面清洁度冷轧高耐候钢及其生产方法
By optimizing the hot rolling process and pickling method, and combining it with reasonable chemical composition control, the problem of poor surface cleanliness of cold-rolled high weathering steel was solved, and the production of cold-rolled high weathering steel with high surface cleanliness and good corrosion resistance was achieved.
CN117701848BActive Publication Date: 2026-07-17MASTEEL HEFEI IRON & STEEL CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MASTEEL HEFEI IRON & STEEL CO LTD
- Filing Date
- 2023-11-30
- Publication Date
- 2026-07-17
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Figure CN117701848B_ABST
Abstract
本发明公开了一种具有高表面清洁度冷轧高耐候钢及其生产方法，具体包括：铸坯在加热炉内的加热时间为100～120min，出炉后先进行第一次除磷，经过粗轧，再进行第二次除磷，然后进行热连轧，热连轧时开轧温度‑终轧温度≤200℃，热连轧时的每道次均进行除鳞；最后进行卷取；酸洗时，6.0≤耐候性能指数I值≤10的钢板所使用的酸洗液浓度小于耐候性能指数I值＞10的钢板；连续退火时通入氮气和氢气的混合气作为保护气，该方法能够获得具有高表面清洁度冷轧高耐候钢，其钢板表面反射率≥85％，该冷轧高耐候钢板的耐大气腐蚀性能指数I值≥6，同时产品的屈服强度≥360MPa，抗拉强度≥490MPa，延伸率≥30％，产品便于下游客户进行表面喷涂处理。
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