Technical Sharing: High Performance Copper Alloy Bar Manufacturing Technology and Applications [SMM Copper Industry Conference]

On April 22, at the CCIE-2025SMM (20th) Copper Conference and Copper Industry Expo - Copper Pipe & Tube Processing Industry Development Forum, hosted by SMM Information & Technology Co., Ltd., Shanghai Nonferrous Metals Network Metal Trading Center, and Shandong Aisi Information Technology Co., Ltd., co-sponsored by Jiangxi Copper Corporation and Yingtan Land Port Holding Co., Ltd., and specially co-organized by Shandong Humon Smelting Co., Ltd., with the assistance of Xinhuang Group and Zhongtiaoshan Nonferrous Metals Group Co., Ltd., Xiao Zhu, General Manager of Hunan Gaochuang Kewei New Materials Co., Ltd., shared insights on the topic of "High-Performance Copper Alloy Bar Manufacturing Technology and Applications." **Dispersion Copper Alloy Bars** ► Introduction to Dispersion Copper Products Product Characteristics: High strength, hardness, resistance to high-temperature softening at 980℃, excellent electrical and thermal conductivity, non-magnetic, and anti-adhesion. ► Preparation Methods of Dispersion Copper ► Issues in Dispersion Copper Material Preparation Excessive free oxygen and coarse alumina particles at grain boundaries are the root causes of hydrogen embrittlement and cold working cracking. If 100g of copper contains 100ppm of oxygen, it can generate 14cm³ of high-pressure water vapor during hydrogen annealing at 800℃, causing the copper to crack. ► Core Technologies and Production Processes of Dispersion Copper The company has effectively solved two core issues in the industrialization of dispersion copper: ppm-level free oxygen content control technology and the uniform distribution regulation technology of nano-level Al₂O₃ particles, achieving optimized process flow, controlled material microstructure, and enhanced comprehensive performance. ► Main Applications of Dispersion Copper in Welding Ideal material for new-generation electrodes: Nano Al₂O₃ particles reinforce the copper matrix, providing stable structure, high strength, high hardness, high electrical conductivity, and resistance to high-temperature softening. ► Applications of Dispersion Copper in Other Fields High-energy combustion chamber radiators, medical CT machine ball valves, inertial guidance components, high-voltage DC relay contacts, aerospace radar components, and high-energy physics experimental device photon absorbers. **Copper-Nickel-Tin Alloy** ► Introduction to Copper-Nickel-Tin Products Product Characteristics: Spinodal decomposition strengthened alloy, ultra-high strength, elasticity, excellent wear and corrosion resistance, beryllium-free, non-magnetic, and environmentally friendly. ► Technical Challenges Using first-principles and molecular dynamics to optimize alloy composition, employing powder metallurgy and continuous casting methods to prepare ingots, solving the severe segregation of Sn elements during alloy ingot preparation, and breaking through key technologies in high-performance bar preparation. Key Technology 1: Homogenization Manufacturing of Large-Scale Powder Metallurgy Ingots and Bar Control Forming Technology • Key preparation technology for large-size homogenized ingots, solving the severe segregation of Sn elements in large-scale ingots; key technologies in high-performance bar radial forging and heat treatment, solving the challenge of precise and efficient product forming. Key Technology 2: Homogenization Manufacturing of Large-Scale Cast Ingots and Combined Deformation Heat Treatment Technology • Through composition optimization, crystallizer design, and casting process control to suppress inverse segregation, significantly improving the dendritic structure of large-scale ingots, achieving homogenized ingot preparation; key technologies in combined deformation heat treatment of high-performance bars, achieving controlled product forming and enhanced comprehensive performance. ► Technical Features Forming a proprietary alloy system, combining physical metallurgy and first-principles calculations to optimize alloy composition; excellent mechanical properties, with prepared copper-nickel-tin bars having a uniform structure, tensile strength greater than 1100MPa, and elongation greater than 9%; forming industrial production capabilities, achieving high-quality manufacturing of large-scale copper-nickel-tin bars. ► Main Application Fields of Copper-Nickel-Tin Aerospace: Mainly used in the manufacturing of aircraft landing gear bushings and heavy-duty bearings; Petroleum: Mainly used in the manufacturing of drilling collars and roller bit floating pieces; Engineering Machinery: Mainly used in the manufacturing of wear-resistant components in various heavy-duty machinery; Industrial Robots: Can be used in the manufacturing of robot joints, reducers, and motors. **Conclusion and Outlook** High-Performance Copper Alloy Manufacturing Development Dimensions Relying on national-level platforms, tackling key technologies in high-end copper alloy manufacturing. Relying on multiple national/provincial-level platforms, innovating towards technological frontiers, solidifying professional technology with "double first-class" disciplines, and providing customized application-oriented services. Additionally, an overview of Hunan Gaochuang Kewei New Materials Co., Ltd. was provided. 》Click to view the special report on CCIE-2025SMM (20th) Copper Conference and Copper Industry Expo.