MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202637113726 A) filed by Advanced Technology & Materials Co. , Ltd.; and At & M Amorphous Technology Co. , Ltd. on September 23, 2026, for Iron-Based Nanocrystalline Ribbon And Preparation Method Therefor.
Inventors include Li, Baisong; Li, Lijun; Li, Huibo; and Liu, Tiancheng.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: The present invention belongs to the technical field of nanocrystalline soft magnetic alloy materials, and discloses an iron-based nanocrystalline ribbon and a preparation method therefor. The preparation method for an iron-based nanocrystalline ribbon of the present invention comprises the following steps: killing molten steel; and enabling the killed molten steel to flow from a nozzle to the surface of a cooling roller to form a melt puddle, wherein the molten steel in the melt puddle is cooled by the cooling roller, so as to obtain an iron-based nanocrystalline ribbon. The characteristic parameter of the melt puddle is as shown in formula (I), wherein k is the characteristic parameter of the melt puddle, and k=1.0-2.0; l is the distance between the roller and the nozzle, and l=0.20-0.25 mm; a is the slit width of the nozzle, and a=0.25-0.30 mm; ? is the thermal conductivity of the cooling roller, and ?=160-200 W/(m·K); and V is the rotation speed of the cooling roller, and V=25-35 m/s. In the present invention, by comprehensively adjusting and controlling the distance between the bottom surface of the nozzle and the outer circumferential surface of the cooling roller, the slit width of the nozzle, the thermal conductivity of the cooling roller and the rotation speed of the cooling roller during ribbon preparation, the characteristic parameter of the melt puddle during the ribbon preparation process is controlled within the range of 1.0-2.0, and a wide ultra-thin nanocrystalline ribbon having a thickness of 8-14 µm can be continuously and stably prepared.
Disclaimer: Curated by HT Syndication.
