Cu-15Ni-8Sn合金的热变形行为和热加工图  

Thermal deformation behavior and thermal processing map of Cu-15Ni-8Sn alloy

作　　者：谢桂兰[1,2] 王永威 朱戴博 韩坦 李娟 李晶鑫[1,2] 张雅婷 李杰 江超华[1] XIE Gui-lan;WANG Yong-wei;ZHU Dai-bo;HAN Tan;LI Juan;LI Jing-xin;ZHANG Ya-ting;LI Jie;JIANG Chao-hua(School of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China;Engineering Research Center of Complex Tracks Processing Technology and Equipment of MoE,Xiangtan 411105,China;Kinkou Suzhou Co Ltd,Taicang 215400,China;Guangdong Zhongfa Modan Co Ltd,Foshan 528000,China)

机构地区：[1]湘潭大学机械工程与力学学院,湖南湘潭411105 [2]复杂轨迹加工工艺及装备教育部工程研究中心,湖南湘潭411105 [3]苏州金江铜业有限公司,江苏太仓215400 [4]广东中发摩丹科技有限公司,广东佛山528000

出　　处：《材料热处理学报》2023年第3期184-195,共12页Transactions of Materials and Heat Treatment

基　　金：湖南省自然科学基金面上项目(2022JJ30570);湖南省优秀博士后创新人才项目(2021RC2087);湖南省水利厅科技项目(XSKJ2021000-31);佛山市南海区“蓝海”人才项目(2030032000861)。

摘　　要：借助Gleeble-3500热模拟试验机研究了Cu-15Ni-8Sn合金在变形温度为933~1083 K,应变速率为0.001~10 s^(-1)条件下的热压缩变形行为,通过Arrhenius模型建立了合金的热压缩变形本构方程并对其准确性进行了验证,基于动态材料模型得到了合金的3D热加工图。结果表明:合金适宜的热加工区间为变形温度993~1083 K,应变速率0.01~0.1 s^(-1);在应变速率为0.01 s^(-1)时,随着变形温度的升高,合金的位错密度逐渐降低,动态再结晶体积分数逐渐增加,小角度晶界逐渐转化为大角度晶界,动态再结晶产生的软化效果使得合金的变形抗力逐渐降低。The thermal compression deformation behavior of Cu-15Ni-8Sn alloy under the conditions of deformation temperature of 933-1083 K and strain rate of 0.001-10 s^(-1)was studied with Gleeble-3500 thermal simulation testing machine.The thermal compression deformation constitutive equation of the alloy was established by Arrhenius model and its accuracy was verified.The 3D thermal processing map of the alloy was obtained based on the dynamic material model(DMM).The results show that the suitable thermal processing range of the alloy is as follows:the deformation temperature of 993-1083 K,and the strain rate of 0.01-0.1 s^(-1).When the strain rate is 0.01 s^(-1),with the increase of deformation temperature,the dislocation density of the alloy gradually decreases,the volume fraction of dynamic recrystallization gradually increases,the small angle grain boundary gradually transforms into the large angle grain boundary,and the softening effect caused by dynamic recrystallization gradually reduces the deformation resistance of the alloy.

关 键 词：CU-15NI-8SN合金 本构方程 热加工图 

分 类 号：TG146.1[一般工业技术—材料科学与工程]