A preparation method of a niobium reinforced hot galvanizing aluminum magnesium S550GD+XM steel suitable for arid and high-cold regions

CN122105226APending Publication Date: 2026-05-29XINJIANG BAYI IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-30
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Hot-dip galvanized aluminum-magnesium alloy steels struggle to achieve a stable balance between high strength, high corrosion resistance, and good formability, making them unsuitable for meeting the long-term corrosion protection requirements of photovoltaic brackets in arid and cold regions.

Method used

By designing the matrix composition and coordinating the process, using the ratio of C, Mn, and Nb elements, combined with annealing and zinc-aluminum-magnesium plating processes, controlling the strip thickness and surface cleaning, high strength and good formability are ensured. Nb element is added for precipitation strengthening and grain refinement, the content of harmful impurities is strictly controlled, and the finishing and passivation processes are optimized.

Benefits of technology

The prepared niobium-reinforced hot-dip galvanized aluminum-magnesium S550GD+XM steel achieves a balance in terms of high strength, high corrosion resistance, and good formability, meeting the requirements for photovoltaic brackets and improving the durability and economy of the material.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of steel metallurgy, and particularly discloses a preparation method of niobium reinforced hot galvanizing aluminum magnesium S550GD+XM steel suitable for arid and high-cold regions and used for photovoltaics, which comprises the following steps: molten iron is subjected to desulfurization, converter smelting, LF furnace refining, continuous casting, hot rolling, cold rolling and zinc aluminum magnesium process to produce finished steel, wherein a double-taper work roll is used for the cold continuous rolling mill, and the zinc aluminum magnesium process is controlled around the plate temperature as the control core. In view of the demand of photovoltaic support in arid and high-cold regions, the niobium reinforced hot galvanizing aluminum magnesium steel prepared through the base component design and process synergistic regulation matches the use requirement of the photovoltaic support, the core element ratio of C, Mn and Nb is regulated, the precipitation strengthening and grain refinement effect of the Nb element are taken as the core, the solid solution strengthening synergistic effect of carbon and manganese is combined, the high-strength indexes of the base material yield strength and tensile strength are ensured, and the bearing requirement of the photovoltaic support is met.
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