en.Wedoany.com Reported - Recently, JISCO Hongxing Hongbo New Materials Company, a subsidiary of Jiuquan Iron and Steel (Group) Co., Ltd. located in Gansu, China, has expanded the thickness of its non-magnetic steel products to a full range of 6 to 100 millimeters through comprehensive process technology research. The off-line products exhibit good flatness and significantly improved surface finish, with all indicators surpassing industry standards. Non-magnetic steel, which combines the corrosion resistance of stainless steel with the strength and toughness of carbon steel, is widely used in the manufacturing of core components for large power equipment such as transformers, reactors, and mutual inductors. However, constrained by the conditions of the original medium plate production line, the company's non-magnetic steel previously suffered from quality issues such as surface roughness and shelling after rolling, which became the main technical bottleneck restricting product quality upgrades and entry into the high-end market.

To overcome the aforementioned bottleneck, the company leveraged the advantages of its newly built heavy plate production line, simultaneously focusing on source control and process optimization. "The unit weight of the slab is not only the foundation for achieving full product coverage but also the key to leveraging the advantages of the heavy plate rolling mill's high reduction and cooling capabilities to improve the surface quality of non-magnetic steel," said a technician from Hongbo New Materials Company. Specifically, the research team innovated slab specification design on one hand, increasing slab width to better adapt to the rolling characteristics of the heavy plate production line; on the other hand, they conducted multiple rounds of trials and verification around key parameters such as slab soaking time in the furnace, finishing rolling temperature, and descaling process, ultimately locking in the optimal process window and effectively avoiding defects like edge cracks and surface shelling. Verified by batch production, the improved non-magnetic steel plate has seen a significant increase in surface finish and a notable reduction in iron oxide scale peeling, with product quality highly recognized by high-end customers.

While consolidating the quality foundation, the company is also continuously expanding its non-magnetic steel product portfolio. Since last year, Hongbo New Materials Company has accelerated the pace of new product development for application scenarios such as heat resistance and wear resistance, and has now formed a differentiated product layout across multiple series. Among them, heat-resistant non-magnetic steel, while maintaining low magnetic permeability, has effectively enhanced its high-temperature and corrosion resistance, making it applicable not only in traditional fields like transformers but also extendable to high-temperature working condition components such as submerged arc furnace charge pipes and distribution chutes. For wear-resistant non-magnetic steel, batch supply of products with thickness specifications of 10 to 20 millimeters has been achieved, with some products even exported to overseas markets through partners.

Going forward, the company's R&D team will continue to optimize the composition system and rolling process of non-magnetic steel, promoting more grades of products to the market and providing basic material support for the high-end equipment manufacturing industry.

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