Core Viewpoint - The development of DHA1 mold steel represents a significant breakthrough in China's high-end mold steel sector, reducing reliance on imports and showcasing the country's capabilities in advanced material innovation [1][7]. Material Characteristics - DHA1 mold steel features a unique alloy composition with 5.5-6.5% chromium, 2.0-3.0% molybdenum, and 0.8-1.2% vanadium, achieving an optimal balance of hardness and toughness [2]. - The addition of niobium allows DHA1 to maintain a hardness of HRC45 or above at 600°C, outperforming traditional H13 steel by approximately 15% [2]. Heat Treatment Process - The optimal heat treatment process involves oil quenching at 1030-1050°C followed by secondary tempering at 520-550°C, resulting in a fatigue life exceeding 30,000 cycles, which is about 20% better than imported counterparts [4]. - In practical applications, DHA1 mold steel has shown a lifespan extension of 30-40% in aluminum alloy die-casting compared to traditional materials, allowing for over 150,000 casting operations per mold [4]. Application Areas - DHA1 has demonstrated versatility in various applications, including the production of large structural components for electric vehicles and precision plastic molds, significantly extending maintenance cycles and reducing production costs [4][5]. - In the aerospace sector, DHA1 has outperformed imported materials in high-temperature oxidation resistance, increasing mold lifespan by over 25% [5]. Market Feedback - DHA1's market price ranges from 48,000 to 52,000 yuan per ton, which, while higher than standard H13 steel, offers over 30% savings compared to similar performance imported materials [5]. - By 2024, DHA1 is expected to capture an 18% market share in China's high-end mold steel sector, with projections to exceed 25% by 2025 [5]. Industry Impact - The successful development of DHA1 has spurred collaborative innovation across the supply chain, with upstream steel manufacturers and downstream toolmakers working together to enhance production processes [5]. - The project has received significant recognition, including the "Metallurgical Science and Technology Award" from the China Iron and Steel Association in 2024, highlighting its technological advancements [6]. Global Market Position - DHA1's emergence is reshaping the global mold steel market, traditionally dominated by Swedish, German, and Japanese firms, with expectations to capture 15% of the high-end mold steel market within three years [6]. - The ongoing challenges include maintaining quality during mass production and establishing internationally recognized material standards [6]. Broader Implications - The success of DHA1 symbolizes China's ascent in high-end manufacturing, demonstrating the potential for domestic innovation to compete on a global scale [7]. - With continued support from national policies, similar innovations are anticipated to emerge, reinforcing the foundation for high-quality development in China's manufacturing sector [7].