高渗透轧制对SA738 Gr.B厚板变形渗透性的影响  

Effect of High Permeability Rolling Process on Deformation Permeability of SA738 Gr.B Thick Plate

作　　者：李艳梅[1] 杨梦奇 张舒展 张田[1] LI Yan-mei;YANG Meng-qi;ZHANG Shu-zhan;ZHANG Tian(The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China.)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室

出　　处：《东北大学学报（自然科学版）》2019年第12期1711-1715,共5页Journal of Northeastern University(Natural Science)

基　　金：“十三五”国家重点研发项目(2017YFB0305301);国家自然科学基金重点资助项目(51604074)

摘　　要：AP1000的钢质安全壳主要用料是SA738 Gr.B特厚钢板,采用传统轧制方法,由于坯料尺寸和轧机能力限制,变形渗透性差,心部韧性不足,通过轧制-冷却一体化的高渗透轧制工艺有望改善厚板性能.采用数值模拟和实验相结合的方法,分析了高渗透轧制工艺对厚规格SA738 Gr.B轧制变形的影响规律.结果表明:为了获得相同的厚向轧制渗透效果,采用厚向温差300℃的高渗透轧制工艺所需单道次压下率相比常规轧制可减少3%~4%.对比实验结果可知,采用高渗透轧制工艺可以提高心部金属变形程度,同时可使各层金属流动更加均匀.The main material of AP1000 steel containment is SA738 Gr.B ultra-heavy plates.With the traditional rolling method,the deformation depth is limited and the core toughness is insufficient,which is mainly due to the blank size and the rolling mill capacity limitation.The high-permeability rolling process integrated by rolling-cooling is expected to improve the performance of the thick plates.The influence of high-permeability rolling process on the rolling deformation of a thick steel SA738 Gr.B was analyzed by numerical modeling and experiments.The results show that in order to obtain the same thick-direction rolling penetration effect,the single-pass reduction rate required for the high-permeability rolling process with a thickness-to-temperature difference of 300℃can be reduced by 3%~4%compared with conventional rolling.Comparing with the experimental results,it can be seen that the high-permeability rolling process can improve the degree of metal deformation of the core and make the metal flow of each layer more uniform simultaneously.

关 键 词：特厚板 SA738 Gr.B 高渗透轧制 低圧缩比 变形渗透度 

分 类 号：TG335.51[金属学及工艺—金属压力加工]