热等静压态FGH96合金的热变形行为及热加工图  

Hot deformation behavior and hot processing map of as-HIPed FGH96 alloy

作　　者：陈蕾蕾 瞿宗宏 王泽钰 赖运金 梁书锦 Chen Leilei;Qu Zonghong;Wang Zeyu;Lai Yunjin;Liang Shujin(ERC of 3D Printing Metal Powder Material,Sino-Euro Materials Technologies of Xi’an Co.,Ltd.,Xi’an Shaanxi 710018,China)

机构地区：[1]西安欧中材料科技有限公司西安市3D打印用金属粉末材料工程技术研究中心,陕西西安710018

出　　处：《金属热处理》2022年第7期63-70,共8页Heat Treatment of Metals

基　　金：陕西省重点研发计划(2021LLRH-05)。

摘　　要：采用Gleeble-3800热模拟压缩试验机对热等静压态FGH96合金进行了不同温度和应变速率的等温热压缩试验,研究了FGH96合金在变形温度分别为1040、1070、1100、1130℃,应变速率为0.001、0.01、0.1和1 s^(-1),最大真应变为0.7条件下的高温热变形行为,分析了真应力-真应变曲线,建立了本构方程,并利用Origin软件构建了热加工图,结合变形温度和应变速率对组织的影响确定了FGH96合金合适的热加工参数。结果表明,热等静压态FGH96合金的真应力-真应变曲线呈现典型的动态再结晶特征,其峰值应力随变形温度的降低和应变速率的增加而增加,结合本构方程、热加工图以及微观组织确定了FGH96合金合适的热加工区域为变形温度1060~1080℃,应变速率0.0001~0.004 s^(-1)。Compression experiments of hot isostatic pressed FGH96 alloy at different temperatures and strain rates were carried out by Gleeble-3800 thermal simulation compression testing machine.The high temperature hot deformation behavior of the FGH96 alloy at deformation temperatures of 1040,1070,1100 and 1130℃,strain rates of 0.001,0.01,0.1 and 1 s^(-1)and the maximum true strain of 0.7 were studied.The true stress-true strain curve was analyzed and the constitutive equation was established,and the hot processing maps were constructed by Origin software,and the optical hot processing parameters were determined combined with the effect of deformation temperature and strain rate on microstructure.The results show that the true stress-true strain curve of hot isostatic pressed FGH96 alloy shows typical dynamic recrystallization characteristics,and the peak stress increases with the decrease of deformation temperature and the increase of strain rate.Combined with constitutive equation,hot working diagram and microstructure,the optical hot processing area of the FGH96 alloy is 1060-1080℃and 0.0001-0.004 s^(-1).

关 键 词：FGH96合金 热变形行为 本构方程 热加工图 

分 类 号：V256[一般工业技术—材料科学与工程]