Accelerating homogenization kinetics and enhancing hot-workability of as-cast nickel-based superalloy via prior hot-deformation  

作　　者：Jia-jun Chen Yang Zhou Hao-ran Han Xian-guang Zhang Goro Miyamoto Ping-mei Tang Dong-ping Xiao Jian-hui Fu Peng Shi Yi-wu Pei Jian Zhang 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China [2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]Chengdu Advanced Metal Materials Industrial Technology Institute Co.,Ltd.,Chengdu 610300,Sichuan,China [4]Institute for Materials Research,Tohoku University,Sendai 980-8577,Aoba-Ku,Japan

出　　处：《Journal of Iron and Steel Research International》2025年第1期215-226,共12页钢铁研究学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.51804232);Beijing Municipal Natural Science Foundation(No.2212041);supported by the Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(FRF-IDRY-20-020);GIMRT Program of the Institute for Materials Research,Tohoku University(202303-RDKGE-0518).

摘　　要：Enhancing homogenization efficiency and hot-workability is the key issue for wrought superalloys in the industry.A novel approach for simultaneous accelerating the homogenization kinetics and improving hot-workability via a simple way of prior hot-deformation was proposed,which was not widely accepted for wrought superalloys.The homogenization efficiency is increased by 40%-70%via performing 10%-20%prior hot-deformation.Both theoretical and experimental analyses revealed that the increment in homogenization efficiency is mainly attributed to the decrease in interdendritic-segregation spacing,and thus the necessary diffusion distance,rather than that of dislocations.In addition,dynamic and static recrystallizations occurred during the prior hot-deformation and diffusion-annealing processes,and the grains were significantly refined even after the homogenization.Furthermore,the size of the precipitates was refined as well.These enhanced the hot-workability of the homogenized ingot for the subsequent cogging process.

关 键 词：Nickel-based superalloy Homogenization kinetics Prior hot-deformation Grain size Hot workability 

分 类 号：TG132.3[一般工业技术—材料科学与工程]