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EFFECT OF INITIAL GRAIN SIZE ON STATIC RECRYSTALLIZA-TION SOFTENING IN Cr STEEL USING STRESS RELAXATION TECHNIQUE

A.R. Morgridge

金属学报(英文版)

Effect of initial grain size (I.G.S.) on static recrystallization softening in Cr steel(0.77wt.% CR) has been investigated through the use of interrupted hot compressiontests and stress relaxation curves from Gleeble 1500. Initial grain sizes were variedbetween 20 and 93 microns. Stress strains curves for Cr steel for different initialgrain sizes and recrystallization times have been highlighted. Similar observation wasmade for metadynamic recrystallization with shorter retardation times. Staticallyrecrystallized grain size also increased as initial grain size increases. It is found thatthe values of initial grain size have significant effects on the mean flow stress andstatic recrystallization kinetics as well as the peak strain values to initiate dynamicrecrystallization.

关键词: initial grain size , null , null

初始晶粒尺寸和轧制间回复退火对Ni-9.3at％W合金基带立方织构形成影响的研究

王金华 , 索红莉 , 马麟 , 田辉 , 孟易辰 , 李孟晓 , 王毅 , 刘敏 , 王高生

稀有金属材料与工程

无磁性、高强度Ni-9.3at％W (Ni9W)合金由于其较低的层错能,难以通过传统的轧制及再结晶退火得到强立方织构.本工作采用熔炼制坯路线,结合均匀化退火和中间再结晶退火的方法得到了晶粒尺寸细小,合金元素W均匀分布的Ni9W坯锭,通过总变形量为99％的轧制,中间引入四次轧制间回复退火得到了厚度为80 μm的Ni9W轧制基带,最后采用两步再结晶退火的方式得到了再结晶立方织构含量为80.2％ (＜10°)的Ni9W合金基带.

关键词: 基带 , 均匀化退火 , 初始晶粒尺寸 , 回复退火 , 立方织构

EFFECT OF INITIAL GRAIN SIZE ON STATIC RECRYSTALLIZA-TION SOFTENING IN Cr STEEL USING STRESS RELAXATION TECHNIQUE

金属学报(英文版)

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