微量稀土对紫铜药型罩晶粒及动态冲击性能的影响  

Effect of trace rare earth on grain size and dynamic impact properties of copper liner

作　　者：张鸣一 杨吉春[1] 贾晓斌 王伟 李淑利 孙全喜 ZHANG Mingyi;YANG Jichun;JIA Xiaobin;WANG Wei;LI Shuli;SUN Quanxi(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014000,China;Inner Mongolia Institute of metal materials,Baotou 014034,China;Inner Mongolia North Heavy Industry Group Co.Ltd.,Baotou 014034,China;Beijing University of Science and Technology,Beijing 100083,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014000 [2]内蒙金属材料研究所,内蒙古包头014034 [3]内蒙古北方重工业集团有限公司,内蒙古包头014034 [4]北京科技大学,北京100083

出　　处：《兵器材料科学与工程》2023年第6期51-56,共6页Ordnance Material Science and Engineering

基　　金：内蒙古关键技术攻关项目(2021GG0273);所列基金项目、联合基金项目(NBFJ2022-29);国防科工局稳定支持经费专项(WDZC2020122)。

摘　　要：为了细化紫铜药型罩晶粒从而提升其性能,通过添加稀土对材料进行改性,用低倍显微镜、金相显微镜及扫描电镜观察了铜药型罩铸态晶粒及再结晶情况,用万能试验机、布氏硬度计和霍普金森压杆装置,测试了铜药型罩力学性能及动态性能,研究了稀土对紫铜药型罩铸态晶粒、再结晶晶粒及动态性能的影响。结果表明:添加稀土后,铜锭铸态晶粒明显细化,再结晶晶粒平均尺寸由0.04 mm减至0.03 mm,再结晶程度由92.1%提高至96.3%;与不添加稀土药型罩相比,试样强度提升20 MPa;伸长率提升0.5%;硬度提升4.4HB;此外,动态性能测试表明:随应变率提高,含稀土的2#试样峰值应力明显增高,2#试样比1#试样对应变率敏感;添加稀土后试样消耗的应变能增大。In order to refine the grain size of copper liner and improve its mechanical properties,the material was modified by adding rare earth,the grain and recrystallization of the copper liner were observed by means of low power microscopy,metallographic microscopy and scanning electron microscopy.The mechanical properties and dynamic properties of the as-cast copper liner were tested by universal testing machine.Brinell hardness tester and Hopkinson pressure bar device,and the effect of rare earth on grain,recrystallized grain and dynamic properties of red copper liner was studied.The results show that after adding rare earth,the grain size of as-cast copper ingot is obviously refined,the average grain size of recrystallization is changed from 0.04 mm to 0.03 mm,and the recrystallization degree is increased from 92.1%to 96.3%.Compared to the liner without rare earth addition,the tensile strength,elongation and hardness of the sample increases by 20 MPa,0.5%and 4.4HB,respectively.Besides,the dynamic property test shows that with the increase of strain rate the peak stress increasing range of the sample increases obviously,and the strain rate of specimen 2#is more sensitive than that of specimen 1#,and the strain energy consumed by the specimen increases after adding rare earth.

关 键 词：稀土 紫铜 铜药型罩 晶粒度 动态性能 

分 类 号：TG413.2[金属学及工艺—焊接] TG146.11[一般工业技术—材料科学与工程]