轮到中国卡脖子了！该技术被列入禁止出口清单，美国3次求购遭拒

Core Viewpoint - The article highlights the significant advancements in metal 3D printing technology developed by Huazhong University of Science and Technology, which integrates casting, forging, and milling into a single process, leading to increased efficiency, reduced costs, and enhanced material utilization in aerospace applications [1][3][5]. Group 1: Technological Innovation - The research team began exploring metal 3D printing in the late 1990s, initially facing challenges with strength and internal defects but eventually developed a method that combines casting and forging using electric arc as a heat source [3][5]. - The integrated technology allows for a material utilization rate exceeding 90%, drastically reducing costs to a fraction of previous methods, and enables the production of complex internal structures that traditional forging cannot achieve [7][9]. Group 2: Market Impact and Recognition - The technology gained international attention after being recognized as leading globally by nine academicians in 2018, and it has been applied in the production of critical aerospace components such as titanium alloy frames and rocket storage tanks [9][11]. - The technology has shifted China from being dependent on foreign suppliers for large titanium alloy components to achieving self-sufficiency, enhancing design freedom and stability for military and civilian applications [11][13]. Group 3: Export Control and Strategic Importance - The Chinese government has implemented strict export controls on this technology due to its dual-use nature, preventing foreign acquisition attempts, including multiple high-value offers from U.S. companies [13][15]. - The protective measures include patenting and regulatory listings to safeguard the technology's core processes and equipment, emphasizing its critical role in national security and industrial independence [15][17]. Group 4: Future Developments and Applications - The technology has been rapidly adopted in various applications, including high-speed maglev train components and military aircraft, with ongoing upgrades to equipment that enhance flexibility and efficiency [18][20]. - Future iterations of the technology are expected to produce larger components at faster speeds, further solidifying China's leading position in aerospace and nuclear power sectors, while also fostering talent and technology transfer to enterprises [24].