水淬温度对Fe-13Cr-2Al-Si合金中Zener弛豫峰的影响  

Effect of quenching temperature on Zener relaxation internal stress in Fe-Cr-Al alloy

作　　者：邹吉猛 蒋卫斌 郝汀 王先平 方前锋 ZOU Ji-meng;JIANG Wei-bin;HAO Ting;WANG Xian-ping;FANG Qian-feng(Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院固体物理研究所材料物理重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《材料热处理学报》2018年第7期73-79,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(11274309)

摘　　要：通过内耗技术测量锻态Fe-13Cr-2Al-Si合金在800~1200℃范围内水淬处理后Zener弛豫峰的变化。结果表明：随水淬温度的升高,Zener峰峰温和激活能等弛豫参量先降低后升高,而晶粒尺寸随水淬温度升高呈线性增加;分析认为Zener峰弛豫参量的剧烈变化是由于水淬过程改变了材料微观内应力,在高温回复阶段,热锻材料内部位错密度逐步减小,内应力降低,而再结晶完成后,随着水淬温度的升高,内应力又逐渐增大;两种不同热处理方式的叠加使得内应力在变温水淬过程中出现非线性变化,从而使Zener弛豫参量发生非线性变化;本实验也验证了内耗谱技术对材料的前期热处理过程具有高度敏感性。The influence of water quenching at 800-1200 ℃ on Zener relaxation peak of forged Fe-13 Cr-2 Al-Si alloy was investigated by internal friction technique. The results show that the relaxation parameters such as the peak temperature and the activation energy of the Zener peak decrease firstly and then increase with the increasing of water quenching temperature,while the grain size increases linearly with the increasing of water quenching temperature. It is considered that the sharp change of relaxation parameters of the Zener peak is due to the change of micro-stress in the process of water quenching. During the recovery at high temperature,the dislocation density and internal stress decrease gradually,but after recrystallization is completed,with the increasing of water quenching temperature,the internal stress increases gradually. The superposition of two different heat treatment methods makes the internal stress change nonlinear in the process of water quenching at variable temperature,thus making the Zener relaxation parameter change nonlinear. The experiment also verifies that the internal friction spectrum technology is highly sensitive to the pre-heat treatment process of the material.

关 键 词：内耗 Zener峰 水淬 内应力 

分 类 号：TG115.24[金属学及工艺—物理冶金] TG135.7[金属学及工艺—金属学]