HESTEEL(SZ:000709) Sou Hu Cai Jing·2026-02-17 12:12Core Viewpoint - Hebei Hegang Material Technology Research Institute Co., Ltd., Hebei Iron and Steel Group Co., Ltd., and Hebei Iron and Steel Co., Ltd. have applied for a patent for a method of producing medium carbon steel large round billets through continuous casting, aimed at improving the quality of the billets and reducing macro segregation [1]. Group 1: Patent Application Details - The patent titled "A Method for Producing Medium Carbon Steel Large Round Billets by Continuous Casting" was published with the application number CN121535151A, and the application date is November 2025 [1]. - The method involves electromagnetic stirring at three different solidification stages during the continuous casting process, specifically at the lower part of the crystallizer, at a solidification rate of 65%-75%, and at a solidification rate of 85%-90% [1]. - The electromagnetic stirring aims to improve the macro segregation of the large round billets by optimizing the flow field in the crystallizer and reducing the carbon segregation [1]. Group 2: Company Profiles - Hebei Hegang Material Technology Research Institute Co., Ltd. was established in 2022, located in Shijiazhuang, with a registered capital of 371.21 million RMB. The company has participated in 126 bidding projects and holds 533 patents [2]. - Hebei Iron and Steel Group Co., Ltd. was founded in 2008, also in Shijiazhuang, with a registered capital of 2 billion RMB. The company has invested in 56 enterprises and participated in 1555 bidding projects, holding 1155 patents [2]. - Hebei Iron and Steel Co., Ltd. was established in 1997, located in Shijiazhuang, with a registered capital of 1.0337 billion RMB. The company has invested in 39 enterprises and participated in 1843 bidding projects, holding 1499 patents [2].