CLA16F/M钢燃料元件电磁渐进成形规律及精确控制研究  

Forming Rules and Accurate Control Method of CLA16F/M Steel Fuel Cell Subjected to Electromagnetic Incremental Forming

作　　者：郑勇 邱绍宇[1] 魏连峰[1] 严思梁 程实建 陈高詹 姚力夫 田大容 Zheng Yong;Qiu Shaoyu;Wei Lianfeng;Yan Siliang;Cheng Shijian;Chen Gaozhan;Yao Lifu;Tian Darong(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu 610213,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]中国核动力研究设计院反应堆燃料及材料重点实验室,四川成都610213 [2]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《稀有金属材料与工程》2024年第1期234-241,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51705119);中核集团领创科研基金(XXXXX);材料成形与模具技术国家重点实验室开放课题(P2021-015);陕西省高性能精确成形技术与装备重点实验室开放课题(PFTE-2020-KF-01);大学生创新训练项目(202210359013)。

摘　　要：基于LS-DynaR8.0软件平台建立CLA16F/M钢燃料元件电磁渐进成形电磁场-结构场顺序耦合有限元-边界元模型,对不同放电电压、内外管间隙以及外管壁厚条件下燃料芯体多道次电磁渐进成形过程进行仿真分析与样件试制,研究其局部塑性流动及缺陷形成规律,并多方位表征其成形质量。结果显示过大的放电电压会导致变形区域向集磁器两端集中,覆管与基管碰撞加剧,引发截面畸变;过小的放电电压无法激发覆管与基管碰撞、变形与贴合,从而导致连接失效。合理选择覆管-基管间隙可以有效避免失稳起皱与壁厚不均匀缺陷。经过模拟燃料元件电磁渐进成形多参数优化,实现了全流程高质量精确成形与缺陷控制,试件覆管-基管贴合精度达到10μm。This work is aimed to investigate time-spatial distribution rules and the effect of process parameters and geometric parameters on the forming quality of CLA16F/M steel manufactured by electromagnetic incremental forming.Based on LS-DynaR8.0 platform,an electromagnetic field-structure field sequential coupled finite element-boundary element model of electromagnetic incremental forming process of dummy fuel element was established.With the aid of the numerical simulation model,the electromagnetic forming process of dummy fuel element under different discharging voltages,flyer tube-base tube clearances and wall thickness of flyer tube were simulated and analyzed,and the sample fuel element was manufactured,for the sake of studying the local plastic flow rules,defects generation rules and characterizing the forming quality.Results show that oversized discharging voltage brings about the concentration of deformation zones to both ends of the tube.Also,the collision between the flyer tube and the base tube is aggravated and section distortion is introduced.Undersized discharging voltage cannot generate the collision,deformation and sticking and thus cause disconnection.Appropriate clearance between base tube and flyer tube can effectively avoid wrinkling and nonuniformity of wall thickness.By comprehensive optimization of process parameters,through-process high quality precise forming of defects control of dummy fuel element was realized and the sticking precision between base tube and flyer tube reaches 10μm.

关 键 词：燃料元件 CLA16铁马钢 电磁渐进成形 成形缺陷 

分 类 号：TL341[核科学技术—核技术及应用] TG142[一般工业技术—材料科学与工程]