非真空熔铸Cu-Cr-Zr合金的热变形行为及动态再结晶临界条件  

Thermal Deformation Behavior and Critical Conditions of Dynamic Recrystallization of Cu-Cr-Zr Alloy Melted under Non-vacuum Condition

作　　者：丁宗业[1] 贾淑果[1,2] 郭望望[1] 邓猛[1] 宋克兴[1] 刘平[1] 

机构地区：[1]河南科技大学,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《稀有金属材料与工程》2014年第2期408-412,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50571035);河南省高校科技创新团队支持计划(2012IRTSTHN008);河南省高等学校青年骨干教师资助计划(09003047);河南科技大学科研创新培育基金(2010CZ0008)

摘　　要：采用Gleeble．1500热模拟实验机对Cu．0．90Cr-0．18Zr合金在变形温度为500～800℃、应变速率为0.01～1s^-1变形条件下进行热压缩变形实验，研究该合金的流变应力、本构方程及动态再结晶临界条件。结果表明：Cu．Cr—Zr合金的流变应力随变形温度的升高而降低，随应变速率的增加而增加，计算出该合金的热变形激活能为584．87kJ／mol并构建本构方程；利用合金的1nθ-ε曲线出现拐点及-（1θ-ε）／ε·ε曲线出现最小值来研究动态再结晶临界应变。The thermal deformation tests of Cu-0.90Cr-0.18Zr alloy were conducted at the deformation temperature of 500-800 ℃ and the strain rate of 0.01-1 s-1 on the Gleeble-1500 thermal-mechanical simulator. The flow stress, the constitutive equation and the critical conditions of dynamic recrystallization were studied. The results show that the flow stress decreases with the increasing of deformation temperature or with the decreasing of strain rate, The constitutive equation was established with the activation energy 584.87 kJ/mol. The critical strain of dynamic recrystallization was studied by inflection point of 1nθ-ε curve and minimum value of -（1nθ-ε）/ε-ε curve.

关 键 词：Cu-0 90Cr-0 18Zr合金 流变应力 本构方程 动态再结晶临界应变 

分 类 号：TG291[金属学及工艺—铸造]