一种镀锌低合金高强钢及其生产方法

By adjusting the hot rolling process and the heritability of microstructure and properties, and combining flexible rolling and heat treatment processes, the problem of efficiently producing galvanized low-alloy high-strength steel of different strength levels in existing technologies has been solved. This has enabled the production of multi-specification steel plates with a single chemical composition, reducing costs and improving performance stability.

CN121951391BActive Publication Date: 2026-07-17BENGANG STEEL PLATES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BENGANG STEEL PLATES CO LTD
Filing Date
2026-04-01
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to efficiently produce galvanized low-alloy high-strength steel of different strength grades under the same composition system, resulting in high production costs and unstable performance. In particular, when adjusting the annealing temperature, it is necessary to add transition material, which affects production efficiency and performance consistency.

Method used

By adjusting the hot rolling process and the heritability of microstructure and properties, using a single chemical composition design, and combining flexible rolling and heat treatment processes, the heating temperature and final rolling temperature of the slab can be controlled to achieve the production of hot-rolled steel plates with different strength levels, and a stable strength level transition can be achieved in the subsequent continuous annealing process.

Benefits of technology

It has enabled the production of galvanized low-alloy high-strength steel of different strength levels under a single chemical composition system, meeting the diverse specifications and performance requirements of the automotive industry, reducing production costs, and improving production efficiency and performance stability.

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Abstract

本发明属于冶金技术领域，尤其涉及一种镀锌低合金高强钢及其生产方法，所述钢的成分按质量百分比计如下：C：0.05%～0.10%，Si：0.05%～0.15%，Mn：0.80%～1.50%，P≤0.020%，S≤0.008%，Al：0.020%～0.060%，Nb：0.020%～0.080%，Ti：0.01%～0.02%，Mo：0.06%～0.12%，O≤0.0060%，N≤0.0060%，其余为Fe及不可避免的杂质。本发明通过单一化学成分体系，结合柔性轧制与热处理工艺，获得不同强度级别的镀锌低合金高强钢，以满足汽车产业对板料多规格、多性能的需求并降低了制造成本。
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