Development of low-alloy NM400 wear-resistant steel coil based on 2250mm hot rolling production line
With the continual development of China's steel production industry, hot rolling production lines and new grades of steel have become increasingly automated. The 2250 hot rolling production line of ZX Steel, one of China's leading steel manufacturers, is no exception. ZX Steel has recently introduced a low-alloy NM400 wear-resistant steel coil based on this production line, providing outstanding abrasion resilience, excellent toughness and good weldability. This breakthrough development ensures the smooth transition of steel to applications in the most demanding industrial settings.
NM400 Wear-Resistant Steel Coil Overview
NM400 is a low-alloy wear-resistant steel coil with a hardness of 400 HBW. It features outstanding abrasion resilience and excellent toughness, making it ideally suitable for large-scale engineering and mining applications. As compared to other types of steel, the NM series provides enhanced resistance to wear, shock and fatigue load, as well as improved weldability.
Manufacturing Process
The production of low-alloy NM400 wear-resistant steel coil utilizes the 2250mm hot rolling production line of ZX Steel. The coil is composed of the core material, low-alloy steel, and high carbon elements on the surface layer. The production process includes several key steps. Firstly, billets are heated and rolled on the hot rolling mill, in order to achieve a specified thickness. Secondly, the strip is cooled as it moves through an water-cooling cylinder. This is important to ensure the correct mechanical properties of the material. Thirdly, the strip is opened and then coated with a layer of iron powder. The iron powder prevents sticking of the surfaces during the pressing process, thus ensuring a favourable shape. Fourthly, the opened strip is heated, pressed and direct-rolled in order to achieve a required thickness. Finally, a layer of wear-resistant material is applied on the surface of the strip before cutting, to provide further protection against wear.
Performance Characteristics
The low-alloy wear-resistant steel coil produced on the 2250mm hot rolling production line of ZX Steel displays excellent abrasion resilience and toughness. The coil offers excellent weldability due to its improved mechanical properties, which allows for the use of all conventional steel welding methods. Furthermore, the low-alloy wear-resistant steel coil demonstrates a very low friction coefficient and good sliding properties, making it ideal for applications in mining and construction projects.
Conclusion
The development of low-alloy NM400 wear-resistant steel coil based on the 2250mm hot rolling production line of ZX Steel is an important milestone in the history of China's steel production industry. The low-alloy wear-resistant steel coil offers excellent abrasion resilience, excellent toughness, improved weldability and very low friction coefficient, thus making it ideal for the most demanding industrial applications. This breakthrough development has opened new avenues for the future of the steel production industry in China.
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