上引连铸Cu-2.40Ni-0.63Si合金高温变形行为及热加工图  

High temperature deformation behavior and hot processing map of upward continuous casting Cu-2.40Ni-0.63Si alloy

作　　者：刘劲松[1,2] 徐亚楠 高博伦 邓偲瀛 王松伟 宋鸿武[2] LIU Jin-song;XU Ya-nan;GAO Bo-lun;DENG Si-ying;WANG Song-wei;SONG Hong-wu(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159 [2]中国科学院金属研究所,师昌绪先进材料创新中心,辽宁沈阳110016

出　　处：《材料热处理学报》2025年第3期93-103,共11页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52105413);辽宁省教育厅基本科研项目(LJKMZ20220591)。

摘　　要：在变形温度为650~950℃、应变速率为0.01~10 s^(-1)及总压缩应变量为60%的条件下,采用Gleeble-3800D型热模拟试验机对Cu-2.40Ni-0.63Si合金进行了热压缩试验,获得了其高温热压缩变形的应力-应变曲线,分析了合金的流变行为;基于试验结果建立了合金的热变形峰值应力模型,并基于不同应变量下的应力值及峰值应力值建立了该合金的热加工图。结果表明:Cu-2.40Ni-0.63Si合金的流变应力随变形温度的升高而减小,随应变速率的增大而增大;Cu-2.40Ni-0.63Si合金的较佳加工区域为变形温度为850~950℃,应变速率为0.01~1 s^(-1)。Under the conditions of deformation temperature of 650-950℃,strain rate of 0.01-10 s^(-1),and total compression strain of 60%,hot compression tests were conducted on Cu-2.40Ni-0.63Si alloy using Gleeble-3800D thermal simulation testing machine,the stress-strain curves of its high-temperature hot compression deformation were obtained,and the flow behavior of the alloy was analyzed.A peak stress model for hot deformation of the alloy was established based on experimental results,and a hot processing map of the alloy was established based on stress values and peak stress values under different strain variables.The results show that the flow stress of the Cu-2.40Ni-0.63Si alloy decreases with the increase of deformation temperature and increases with the increase of strain rate.The optimal processing area for the Cu-2.40Ni-0.63Si alloy is the deformation temperature of 850-950℃and the strain rate of 0.01-1 s^(-1).

关 键 词：CU-NI-SI合金 热压缩 本构方程 热加工图 显微组织 

分 类 号：TG146.1[一般工业技术—材料科学与工程]