科研之友
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摘要
A high-conductivity CuCrZr induction heating coil was additively manufactured by selective laser melting (SLM)．After reverse modeling and optimum design of the induction heating coil，the self-developed SLM equipment DiMetal-280 was used for manufacturing the coil．Results show that the relative density and electrical conductivity of SLM-processed CuCrZr parts is 99.34 % and 26% international annealed copper standard (IACS) value，respectively． An increase of the relative density is beneficial to improve the electrical conductivity．The process window of the SLM-processed CuCrZr alloy is located at high laser powers and low scanning speeds．After solid solution at 800 ℃ for 2 h，the conductivity of the CuCrZr alloy increases from about 20% IACS value to 88.96% IACS value．After heat treatment，the electroconductivity and mechanical properties of CuCrZr alloy are improved，and the outstanding comprehensive performance is obtained when heat treatment is performed at 500～600 °C．The tensile strength and electrical conductivity are above 475 MPa and 80% IACS values，respectively．Finally，an induction heating coil with complex structure was integrally fabricated by SLM．After 5 h aging heat treatment at 600 ℃，the average electrical conductivity is 82.80% IACS values，and the cooling water flow rate is 19.5 L/min，complying with the application requirements. ? 2023 Huazhong University of Science and Technology.
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