Linggang Stock applied for a patent for low heat storage bearing steel billet heating production to improve product quality

Lingyuan Iron & Steel Co., Ltd. (hereinafter referred to as "Lingyuan Iron & Steel") has applied for a patent entitled "A low-heat storage bearing steel ingot heating production method", with the patent publication number CN202410541331.X and the application date of April 2024.

The patent abstract shows that the invention relates to a low-heat storage bearing steel ingot heating production method, which mainly includes the following steps: filling the steel into the regenerative furnace, performing the initial heat preservation preheating after the filling is completed, and then slowly heating it to a suitable carbon diffusion temperature, and performing a secondary heat preservation treatment at this temperature. The steel is discharged in batches, and after each discharge, it is heated again to the carbon diffusion temperature and then continues to discharge. This method utilizes the low-temperature preheating technology of high-carbon steel, which can achieve the slow heating of bearing steel before the austenite phase transformation, and effectively avoid the problem of ingot cracking caused by excessive thermal stress. At the same time, through the high-temperature carbon diffusion technology, it is ensured that the carbide is fully dissolved and evenly diffused, thereby reducing the level of technical indicators such as carbide liquid precipitation. In addition, the intermittent steel tapping method can make up for the lack of heating furnace capacity, ensure the diffusion effect of bearing steel at high temperature, reduce the idling time of the rolling mill, and thus reduce the overall production cost, making the production of large-section steel more efficient.

The application of this patented technology helps to improve the quality of bearing steel, reduce energy consumption and costs in the production process, and is of great significance to enhancing the competitiveness of Linggang Co., Ltd. in the bearing steel market.