采用不同方法预测10Cr9MoW2VNbBN钢蠕变曲线的比较
A Comparison for Predicting Creep Curves of 10Cr9MoW2VNbBN Steel by Different Methods
摘 要
采用θ投影法和自行建立的复合修正模型对10Cr9MoW2VNbBN钢的蠕变曲线进行了预测,并与600℃和650℃时的蠕变试验数据进行了对比.结果表明:θ投影法能较好地描述蠕变应变与时间的关系,但对蠕变速率与时间的关系不能客观描述;自行建立的复合修正模型能够更客观地描述试验钢真实的蠕变行为;但基于复合修正模型的蠕变曲线结合断裂应变进行持久寿命外推时,其外推值高于真实值.
复合修正模型
10Cr9MoW2VNbBN钢
寿命预测
蠕变
θ projection method
composite correction model
10Cr9MoW2VNbBN steel
prediction life
creep
Abstract
A prediction for the creep curves of 10Cr9MoW2VNbBN steel through θ projection method and self-built correction model was performed,and then compared with the creep experimental data at 600℃ and 650℃.The results show that the θ projection method can well describe the relationship between the creep strain and time,however,it can not describe the relationship between the creep rate and time objectively.The self-built correction model in this paper can describe the real creep behavior of the tested steel.However,when the creep curves based on the self-built correction model combining with fracture strain were used to extrapolate the creep rupture life,the extrapolated value was much higher than the real one.
中图分类号 TG115.5
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(51134013;51171037)
收稿日期 2013/12/16
修改稿日期 2014/11/12
网络出版日期
作者单位点击查看
备注江冯(1990-),女,湖北潜江人,硕士研究生.
引用该论文: JIANG Feng,LIU Chun-hui,CHENG Cong-qian,ZHAO Jie. A Comparison for Predicting Creep Curves of 10Cr9MoW2VNbBN Steel by Different Methods[J]. Materials for mechancial engineering, 2015, 39(3): 89～93
江冯,刘春慧,程从前,赵杰. 采用不同方法预测10Cr9MoW2VNbBN钢蠕变曲线的比较[J]. 机械工程材料, 2015, 39(3): 89～93
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参考文献
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【2】孙海生,徐彤,关凯书.Omega蠕变寿命评估方法及应用[J].压力容器,2012,29(9):19-23.
【3】GRAHAM A,WALLES K F A.Relationships between long and short-time creep and tensile properties of a commercial alloy[J].Journal of the Iron and Steel Institute of Japan,1955,179:105-120.
【4】EVANS R W,WILSHIRE B.Creep of metals and alloys [M].London:Institute of Metals,1985.
【5】SAMUEL E I,CHOUDHARY B K,RAO K B S.Influence of temperature and strain rate on tensile work hardening behavior of type 316 LN austenitic stainless steel[J].Scripta Materialia,2002,46:507-512.
【6】陈国良,郭宏,孙继跃.耐热钢12Cr1MoV蠕变性能的描述和外推[J].北京科技大学学报,1997,19(2):19-22.
【7】蔡庆木,刘月明,黄昌清,等.火电厂高温压力管道寿命预测模型的可靠性及进展[J].机械工程材料[J].2012,36(12):5-9.
【8】SANDSTROM R.Basic model for primary and secondary creep in copper[J].Acta Materialia,2012,60:314-322.
【9】National Institude for Materials Science.NIMS creep data sheet[M].Tsukuba-shi,Ibaraki,Japan:［s.n］,2002.
【10】KIMURA K,SAWADA K,KUBO K,et al.Influence of stress on degradation and life prediction of high strength ferritic steels[J].ASME Pressure Vessel and Piping Division Conference Proceedings,2004,476:11-18.
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