Cao Tieshan   

Associate Professor
Supervisor of Master's Candidates

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Language:English

Paper Publications

Title of Paper:基于应力松弛实验对服役25Cr35Ni型耐热钢的高温性能评估

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Date of Publication:2017-08-09

Journal:材料工程

Included Journals:Scopus、EI、CSCD

Volume:45

Issue:8

Page Number:96-101

ISSN No.:1001-4381

Key Words:25Cr35Ni型耐热钢;应力松弛;寿命预测;TTP参数法

Abstract:以服役的25Cr35Ni型钢为对象,研究利用应力松弛实验开展高温性能评估的方法以及对持久性能的预测效果.结果表明:由于高温服役后晶界处碳化物出现网链状和奥氏体基体内二次碳化物明显粗化,25Cr35Ni型耐热钢持久性能降低.通过得到的不同温度和应力的松弛蠕变速率曲线及外推关系,结合松弛蠕变速率-断裂时间关系方程,可以实现由松弛实验及少量蠕变持久实验开展持久寿命评估.与基于高温持久实验的预测结果比较,两者吻合较好.

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