再加工工艺对N18锆合金板残余应力的影响  

Effect of reprocessing on residual stress of N18 zirconium alloy plate

作　　者：杨攀[1] 张宏智 张毅勇 强瑞[1] 姜强[1] 赵勇 肖亚 Yang Pan;Zhang Hongzhi;Zhang Yiyong;Qiang Rui;Jiang Qiang;Zhao Yong;Xiao Ya(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu Sichuan 610213,China;School of Aeronautics and Astronautic,Sichuan University,Chengdu Sichuan 610065,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]四川大学空天科学与工程学院,四川成都610065

出　　处：《金属热处理》2020年第12期106-110,共5页Heat Treatment of Metals

摘　　要：采用"热轧+冷轧+退火"工艺对N18锆合金板进行再加工,通过X射线法分析板的表面残余应力,采用EBSD技术分析晶界取向差角分布和大小角度晶界。结果表明,热轧后N18锆合金板的表面残余应力呈现无规律分布状态;冷轧后板的表面残余应力均为压应力,其大小随着冷轧变形量的增加而增加;退火后板的表面残余应力值处于较低水平,当退火制度为500℃×2 h时,残余应力处于最低水平;退火后,板的微观结构以小角度晶界为主,且随着退火温度的升高,小角度晶界的密度先增加后趋于稳定。N18 zirconium alloy plates were reprocessed through"hot rolling+cold rolling+annealing".The surface residual stress was acquired by X-ray diffraction method.The disorientation angle distribution and the grain boundaries were analysed by means of EBSD.The results show that after hot rolling,the distribution of surface residual stress on the N18 zirconium alloy plate is no rule.After cold rolling,the surface residual stress increases with rise of cold rolling deformation quantity and entirely presents compression stress.After annealing,the surface residual stress level is low and reaches the lowest when annealing at 500℃ for 2 h.After annealing,the microstructure mainly consists of low angle grain boundaries,and the density of which shifts from increasing to stabilization with rise of annealing temperature.

关 键 词：N18锆合金板 残余应力 再加工 

分 类 号：TG166.7[金属学及工艺—热处理]