Fe-15Cr-25Ni高温合金热压缩变形条件下的流变应力模型  

Model for Flow Stress of Fe-15Cr-25Ni Superalloy Under Hot Compression

作　　者：潘崇超[1] 李殿国[2] 凌刚[1] 尹法杰[2] 马天军[3] 

机构地区：[1]中国农业大学工学院,北京100083 [2]钢铁研究总院 [3]上海宝钢集团,上海201900

出　　处：《材料工程》2005年第6期7-10,30,共5页Journal of Materials Engineering

摘　　要：采用Gleeble-1500热模拟试验机对Fe-15Cr-25Ni高温合金在应变速率为0.005～1.0s-1,变形温度为950～1200℃条件下的流变应力进行了研究.结果表明:在实验范围内,Fe-15Cr-25Ni高温合金热压缩变形过程中发生明显的动态再结晶;用Zener-Hollomon参数的双曲对数函数能较好的描述Fe-15Cr-25Ni合金流变行为;所回归的峰值应力表达式为:σp＝21.3139lnε·+9.580495×105·Τ-1-538.12;热变形激活能Q＝373.71kJ/mol.The flow stress of Fe-15Cr-25Ni superalloy was investigated in the temperature range from 950°C to 1200°C and at strain rate range from 0.005 s-1 to 1.0 s-1 on Gletble-1500 test machine. The experimental results show that dynamic recrystallization occur in evidence during hot compression of Fe-15Cr-25Ni superalloy in the experiment condition. The flow stress of Fe-15Cr-25Ni superalloy can be represented by a Zener-Hollom parameter in the hyperbolic logarithm type equation. The regressed peak stress expression is σp=2.3139lnε + 9.580495 × 105 · T-1-538.12. The hot deformation activation energy of Fe-15Cr-25Ni superalloy during hot compression is 373.71 kJ/mol.

关 键 词：Fe-15Cr-25Ni高温合金 热压缩变形 流变应力 ZENER-HOLLOMON参数 热变形激活能 

分 类 号：TG111.7[金属学及工艺—物理冶金]