CITIC Group has patented a method for producing low-carbon, nitrogen-containing austenitic stainless steel bars. The process involves smelting, electroslag remelting with a specific slag composition, and forging techniques, resulting in high-strength steel with uniform chemical composition and high purity. GlobalData’s report on CITIC Group 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 CITIC Group, was a key innovation area identified from patents. CITIC Group's grant share as of July 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
The patent US12024754B2 outlines a method for manufacturing a low-carbon, nitrogen-containing austenitic stainless steel bar. The process begins with smelting to produce a steel ingot, followed by electroslag remelting using a specific slag composition that includes CaF2, Al2O3, CaO, and MgO in defined weight percentages. The crystallized steel ingot is then subjected to a soaking treatment at temperatures between 1130-1150°C, followed by a series of forging steps that include upsetting-and-drawing and radial forging. The method specifies precise parameters for each forging step, including temperature ranges, deformation methods, and time durations, ultimately resulting in a stainless steel bar with a diameter of 200 mm.
The composition of the final stainless steel bar is carefully controlled, with specific weight percentages for elements such as carbon, silicon, manganese, chromium, and nickel, among others. The patent also details additional steps, such as cutting and surface-polishing the steel ingot before remelting, and the use of an electrode bar during the electroslag remelting process. The resulting stainless steel bar is characterized by significant mechanical properties, including a tensile strength of at least 410 MPa at 350°C and 560 MPa at room temperature, as well as yield strengths of 140 MPa and 260 MPa at the respective temperatures. This method aims to enhance the quality and performance of austenitic stainless steel products.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
