In 2026, Haoyang Casting and Forging of Jinan will launch gradient hardness forged steel balls. Using the "double-frequency quenching" process, the surface hardness reaches 65HRC while the core has a toughness of 15J/cm², resulting in a 50% increase in wear resistance and a 40% improvement in mining grinding efficiency. This technology has obtained a national patent and has been supplied in batches to enterprises such as Zijin Mining and exported overseas. The company plans to invest 20 million yuan to expand the production line, with a target annual production capacity of 30,000 tons, aiming to occupy 30% of the domestic high-end market share.