轧制及退火工艺对C5071青铜带材组织与性能的影响  

Effect of Rolling and Annealing Process on Microstructure and Properties of C5071 Bronze Strip

作　　者：胡斐斐 章志浩 刘羽飞 江平华 刘诚毅 HU Fei-fei;ZHANG Zhi-hao;LIU Yu-fei;JIANG Ping-hua;LIU Cheng-yi(Jiangxi Jiang Copper High Precision Plate Belt Co.,Ltd.,Nanchang Jiangxi 330096,China;Jiangxi Copper Group Copper Plate Belt Co.,Ltd.,Nanchang Jiangxi 330096,China)

机构地区：[1]江西江铜高精板带有限公司,江西南昌330096 [2]江西铜业集团铜板带有限公司,江西南昌330096

出　　处：《热处理技术与装备》2024年第1期10-14,23,共6页Heat Treatment Technology and Equipment

摘　　要：C5071青铜带材制备过程中,轧制工序不同道次加工率及中间去应力退火工艺对带材的组织与力学性能具有重要影响。结果表明,选取较小的加工率86.21%开坯粗轧至2.0 mm时,带材表面平整,无边裂缺陷及明显组织缺陷;中轧工序加工率为66.0%时,带材抗拉强度、延伸率及硬度合适,板型较平直。最优轧制工艺制备的0.5 mm成品分别在210、230和290℃温度下保温3.5 h进行低温退火处理,随着退火温度升高,成品抗拉强度由526 MPa降至500 MPa,延伸率由13.4%提高至17.2%。退火温度低,带材抗拉强度偏高;退火温度高,带材力学性能偏低,230℃×3.5 h退火后产品综合性能均位于技术要求中间范围。During the preparation of C5071 bronze strip,the microstructure and mechanical properties of the strip are greatly affected by the different processing rates and intermediate stress relief annealing process.The results showed that the strip had flat surface,no crack defect and obvious microstructure defects when the processing rate was 86.21% and rolled to 2.0 mm.When the processing rate of middle rolling was 66.0%,the tensile strength,elongation rate and hardness of the strip were suitable,and the plate shape was relatively straight.The 0.5 mm finished products prepared by the optimal rolling process was subjected to low-temperature annealing treatment at temperatures of 210,230 and 290℃ for 3.5 h,respectively.With the increase of annealing temperature,the tensile strength of finished products decreased from 526 MPa to 500 MPa,and the elongation rate increased from 13.4% to 17.2%.The tensile strength of the strip with low annealing temperature was higher,the mechanical properties of the strip with high annealing temperature were lower,and the comprehensive properties of the strip after annealing at 230℃ for 3.5 h were in the middle range of technical requirements.

关 键 词：C5071青铜带材 道次加工率 去应力退火 抗拉强度 延伸率 

分 类 号：TG156.2[金属学及工艺—热处理]