The production process of hot-rolled bar includes preheating of billets, rolling, and finishing, etc., covering energy consumption, material consumption, waste treatment, and environmental emissions required in the production process.

Hot-rolled bars are long steel products manufactured through a hot rolling process. They are characterized by excellent strength and toughness, which allows them to withstand high tensile and compressive loads. These bars can be further processed into products such as threaded steel, wire, and rebar. Bearing steel hot-rolled bars are materials specifically designed for the manufacture of high-performance bearings and are processed into cylindrical bars through a hot rolling technique. This material is generally made from high-carbon chromium steel, with main components including carbon (0.95% to 1.1%) and chromium (1.3% to 1.4%). 65%), and small amounts of manganese, silicon, phosphorus, and sulfur. Hot-rolled bars of bearing steel are mainly used in the production of various precision bearings, such as ball bearings, roller bearings, and needle bearings. They are widely used in the automotive industry, mechanical engineering, railways, aerospace, and heavy industries.