摘要
采用激光选区熔化(SLM)增材制造技术成形高导电率CuCrZr感应加热线圈.对感应加热线圈进行逆向建模与优化设计后,使用自主研发的SLM设备DiMetal-280进行成形.结果表明:CuCrZr合金成形致密度与导电率分别达到99.34%与26%IACS(国际退火铜标准)值,提高致密度有利于改善导电性能;SLM成形CuCrZr合金的工艺窗口为高激光功率、低扫描速度;经过800℃固溶2 h后,CuCrZr合金的导电率从20%IACS值提升到88.96%IACS值;热处理后,其导电性能与力学性能得到提升,在500~600℃进行热处理时获得优异的综合性能,抗拉强度与导电率分别达到475 MPa及80%IACS值以上;最后,通过SLM一体化成形复杂结构的感应加热线圈,经过600℃时效5 h处理后平均导电率为82.80%IACS值,冷却水流量达到19.5 L/min,满足应用要求.
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℃.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.
作者
王迪
欧远辉
陶振青
韩昌骏
WANG Di;OU Yuanhui;TAO Zhenqing;HAN Changjun(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;GAC Toyota Engine Co.Ltd.,Guangzhou 511455,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第4期82-90,共9页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(52073105)
国家重点研发计划资助项目(2022YFB4600303)。
关键词
激光选区熔化
CUCRZR合金
感应加热线圈
热处理
导电率
selective laser melting
CuCrZr alloy
induction heating coil
heat treatment
electrical conductivity
