BlueScope Steel. has filed a patent for an Al-Zn-Si-Mg alloy coated strip with unique microstructure containing Mg2Si particles. The coating has a specific distribution of Mg2Si particles, with the surface region having minimal or no Mg2Si particles. GlobalData’s report on BlueScope Steel gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on BlueScope Steel, Rainwater Harvesting Systems was a key innovation area identified from patents. BlueScope Steel's grant share as of January 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
Alloy coated strip with specific mg2si particle distribution
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A newly filed patent (Publication Number: US20240026512A1) describes a hot-dip coating method for producing a corrosion-resistant and cracking-resistant Al—Zn—Si—Mg alloy coated steel strip. The method involves passing a steel strip through a hot dip coating bath containing specific percentages of aluminum, zinc, silicon, and magnesium to form an alloy coating. The coating thickness is controlled to ensure a short-range variation of no more than 40% in a 5 mm diameter section, with the microstructure distribution of Mg2Si particles being controlled to have no more than 10 wt. % in the surface region of the coating. This precise control results in the formation of a high-quality alloy coated steel strip.
Furthermore, the patent outlines additional details such as the coating thickness variation being limited to no more than 30% in a 5 mm diameter section, the coating thickness being maintained between 7 µm and 30 µm, and the inclusion of elements like strontium, iron, vanadium, and chromium in the hot dip coating bath to enhance the properties of the alloy coating. The method also specifies that the surface region of the coating should have substantially no Mg2Si particles to ensure optimal corrosion resistance and cracking resistance. Cooling of the alloy coating is carried out at specific rates depending on the coating mass, further contributing to the overall quality of the Al—Zn—Si—Mg alloy coated steel strip.
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