2.25Cr-1Mo复杂应力状态下温度对低周疲劳寿命影响的研究  

A Study of the Influence of Temperature on the Low Cycle Fatigue Life of 2 25Cr 1Mo Steel under Complicated Stress State

作　　者：王正[1] 贾松峰[1] 崔宁 

机构地区：[1]抚顺石油学院

出　　处：《压力容器》1999年第3期21-23,29,共4页Pressure Vessel Technology

基　　金：辽宁省自然科学基金;中石化集团公司资助

摘　　要：１引言２．２５Ｃｒ－１Ｍｏ是石油化工设备（如加氢反应器、重整反应器等）常用材料。由于这类设备长期在较恶劣的工况下运行，而频繁的间断操作和开停工引起载荷、温度的波动，造成了材料的疲劳失效。因此，对２．２５Ｃｒ－１Ｍｏ材料复杂应力状态下低周疲劳性能的研究...Abstract Through low cycle fatigue experiment on 2 25Cr 1Mo steel at different temperatures,this paper studies the influence of temperature on the low cycle fatigue life of this material.Using the two surface model within non harden region(NHRDS)program to calculate the stress and strain at the point of crack,the results show:the low cycle fatigue life of this material under complicated stress state can be characterized by equivalent strain range by the form of formula Manson-Coffin,substituting the constants in the life calculating formula by functions of temperature,the influence of temperature on the fatigue life can be experssed in quantity.

关 键 词：复杂应力状态 低周疲劳寿命 温度 石油化工设备 

分 类 号：TQ050.41[化学工程]