Mo-14Re合金热变形行为及热加工图  

Hot Deformation Behavior and Hot Processing Map of Mo-14Re Alloy

作　　者：王先俊 杨俊宙 王世臣 王智轩 胡卜亮[1,2] 王力 白润[1,4] 高选乔 张文 胡平[1,2] Wang Xianjun;Yang Junzhou;Wang Shichen;Wang Zhixuan;Hu Boliang;Wang Li;Bai Run;Gao Xuanqiao;Zhang Wen;Hu Ping(College of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;National and Local Joint Engineering Research Center for Functional Materials Processing,Xi’an 710055,China;School of Mechanical and Electrical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]功能材料加工国家地方联合工程研究中心,陕西西安710055 [3]西安建筑科技大学机电工程学院,陕西西安710055 [4]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2024年第10期2891-2896,共6页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2022YFB3705400);陕西省创新能力支持计划科技创新团队项目(2022TD-30);西安市科技计划(2023JH-GXRC-0020);陕西省高校青年创新团队(2019-2022);中国博士后科学基金(2023T160503)。

摘　　要：利用Gleeble-3500热模拟试验机对Mo-14Re合金棒料进行了恒应变速率的压缩实验,研究Mo-14Re合金在1400、1500、1600℃和应变速率0.01、0.1、1、10 s^(-1)时的高温流变行为。研究表明,在热变形过程中,流变应力随着变形温度的升高和应变速率的降低而降低,这是由于加工硬化和动态软化这2个竞争机制在不同条件下的相对影响所导致的。基于Arrhenius模型和Zener-Hollomon函数,建立了Mo-14Re合金的流变应力本构方程,求得Mo-14Re合金的热变形激活能为588310 J·mol^(-1)。根据所建立的热加工图,得出Mo-14Re合金的合理成形工艺参数为温度在1400~1600℃,应变速率在0.0089~0.14 s^(-1),功率耗散系数不低于0.22。The constant strain rate compression experiments were conducted on Mo-14Re alloy by the Gleeble-3500 thermal simulation testing machine.The rheological behavior of Mo-14Re alloy at 1400,1500 and 1600℃,and strain rate of 0.01,0.1,1 and 10 s^(-1)was studied.The results show that during the hot deformation process,the flow stress decreases with the increase in deformation temperature and the decrease in strain rate,which is due to the relative effect of work hardening and dynamic softening under different conditions.Based on the Arrhenius model and Zener-Hollomon function,a constitutive equation of the flow stress of Mo-14Re alloy is established,and the activation energy for hot deformation of Mo-14Re alloy is obtained to be 588310 J·mol^(-1).According to the established hot processing map,the reasonable forming process parameters of Mo-14Re alloy are as follows:temperature is 1400–1600℃,the strain rate is 0.0089–0.14 s^(-1),and the power dissipation coefficientηis not less than 0.22.

关 键 词：Mo-14Re合金 热变形行为 本构方程 热加工图 

分 类 号：TG146.412[一般工业技术—材料科学与工程]