GNEE STEEL is a family-owned steel supplier.GNEE Global Enterprises stands tall with an impressive international footprint, exporting its products to over 70 countries and regions. From the United States to the European Union, our products have gained a strong reputation for their exceptional quality and services. We are proud to have established ourselves as a reliable global player in our industry.
What is the ship plate production technology?
The general strength A and B class ship plates can meet their process and mechanical performance requirements through ordinary rolling, so the production process is relatively simple; while the production of D, E class and high strength class ship plates requires relatively complete equipment. Under the equipment, it is realized through controlled rolling and controlled cooling process or heat treatment process. At the same time, the requirements for the inherent steel purity of the supplied steel billets are relatively high, especially the content of S, P, N, O, H, etc. in the steel must be strictly controlled.
In order to reduce costs, it is a good idea to produce ship plates by hot rolling or controlled rolling instead of normalizing. High-strength ship plates with a thickness less than 35mm have been produced by two-stage controlled rolling; high-strength ship plates with a thickness greater than 35mm are mostly produced by hot rolling and normalizing.
In order to ensure the performance of high-strength ship plates, micro-alloying technology is used. By adding Nb, V, Ti and other alloying elements to the steel, combined with the controlled rolling process, the grains are refined and the strength and toughness are improved. Due to limitations of billet shape and billet weight, many manufacturers cannot produce extra-thick ship plates. Pudong Steel Thick Plate Factory and Wugang Heavy Plate Factory can use large slabs or large steel ingots to roll ship plates with a thickness greater than 50mm.
D and E series ship plates require good low-temperature toughness and good welding performance. This must first be guaranteed in the steel smelting process, and secondly, an effective controlled rolling and cooling process must be implemented. In recent years, major domestic steel companies have fully realized the importance of improving the intrinsic quality of steel. Relying on advances in smelting technology, they have made improvements in hot metal desulfurization and slag removal, steelmaking, hydrogen blowing, and vacuum refining outside the furnace, which have significantly reduced harmful substances in steel. Content of elements and impurities.
