增刊1 李永超等：连轧钢管限动芯棒温度场及热疲劳有限元分析 ·71· 程，至冷却结束时，芯棒表面最高温度为98℃. [5]Ma M T.The Bauschinger Effect of Metal Alloys and Its Application (2)脱管后，芯棒表面轴向和环向压缩热应力 in Industrial Production.Beijing:Mechanical Industry Press, 1994 均达到900MPa,第三次水冷结束时刻，轴向拉伸热 (马鸣图.金属合金的包辛格效应及其在工业生产中的应用 应力达到186MPa,环向拉伸热应力达到221MPa. 北京：机械工业出版社，1994) (3)芯棒的拉压交变热应力使表面发生热疲劳 [6]Li M.Hot die steel mechanical basis of thermal fatigue cracks. 裂纹的萌生，热应力对轴向裂纹萌生的促进作用强 Mech Eng Mater,1993,17(6):29 于环向裂纹. (李明.热作模具钢热疲劳裂纹的力学基础.机械工程材料， (4)萌生的裂纹在热应力作用下会向内部扩 1993,17(6):29) Paris P C.Erdogan F.A critical analysis of crack propagation 展，当环向裂纹扩展至距表面17.5mm深、轴向裂纹 laws.J Basic Eng,1963,85(4):528 扩展至距表面20mm深时会显著受阻，热应力对轴 [8]Cui W C.A state-oftthe-art review on fatigue life prediction meth- 向裂纹扩展的促进作用强于环向裂纹. ods for metal structure.J Mar Sci Technol,2002,7(1):43 Elber W.Fatigue crack closure under cyclic tension.Eng Fract 参考文献 Meeh,1970,2(1):37 [1]Zhao Z Y,Qi X M,Su H C,et al.Finite element analysis of metal [10]Miller K J.Behaviour of short cracks and their initiation:Part I. flow during tube continuous rolling by a full float mandrel mill.J A review of two recent books.Fatigue Fract Eng Mater Struct, Unir Sci Technol Beijing,2010,32(2):183 1987,10(1):75 (赵志毅，齐秀美，苏慧超，等.全浮动芯棒钢管连轧金属流动 [11]Miller K J.The behaviour of short cracks and its initiation:Par 的有限元分析.北京科技大学学报，2010,32(2)：183) II.A general summary.Fatigue Fract Eng Mater Struct,1987, Devadas C,Samarasekera I V.Heat transfer during hot rolling of 10(2):93 steel strip.Ironmaking Steelmaking,1986,13(6):311 [12]Newmana J A,Piascik R S.Interactions of plasticity and oxide B]Fletcher J D,Beynon J H.Heat transfer conditions in roll gap in crack closure mechanisms near the fatigue crack growth thresh- hot strip rolling.Ironmaking Steelmaking,1996,23(1):52 old.Int J Fatigue,2004,26(9):923 4]Feng X P.Mold Failure Analysis.Beijing:Mechanical Industry [13]Vasudeven A K,Sadananda K,Louat N.A review of crack clo- Press,1987 sure,fatigue crack threshold and related phenomena.Mater Sci (冯晓普.模具的失效分析.北京：机械工业出版社，1987) EmgA,1994,188(1/2):1增刊 1 李永超等: 连轧钢管限动芯棒温度场及热疲劳有限元分析 程，至冷却结束时，芯棒表面最高温度为 98 ℃ ． ( 2) 脱管后，芯棒表面轴向和环向压缩热应力 均达到 900 MPa，第三次水冷结束时刻，轴向拉伸热 应力达到 186 MPa，环向拉伸热应力达到 221 MPa． ( 3) 芯棒的拉压交变热应力使表面发生热疲劳 裂纹的萌生，热应力对轴向裂纹萌生的促进作用强 于环向裂纹． ( 4) 萌生的裂纹在热应力作用下会向内部扩 展，当环向裂纹扩展至距表面 17. 5 mm 深、轴向裂纹 扩展至距表面 20 mm 深时会显著受阻，热应力对轴 向裂纹扩展的促进作用强于环向裂纹． 参 考 文 献 ［1］ Zhao Z Y，Qi X M，Su H C，et al． Finite element analysis of metal flow during tube continuous rolling by a full float mandrel mill． J Univ Sci Technol Beijing，2010，32( 2) : 183 ( 赵志毅，齐秀美，苏慧超，等． 全浮动芯棒钢管连轧金属流动 的有限元分析． 北京科技大学学报，2010，32( 2) : 183) ［2］ Devadas C，Samarasekera I V． Heat transfer during hot rolling of steel strip． Ironmaking Steelmaking，1986，13( 6) : 311 ［3］ Fletcher J D，Beynon J H． Heat transfer conditions in roll gap in hot strip rolling． Ironmaking Steelmaking，1996，23( 1) : 52 ［4］ Feng X P． Mold Failure Analysis． Beijing: Mechanical Industry Press，1987 ( 冯晓普． 模具的失效分析． 北京: 机械工业出版社，1987) ［5］ Ma M T． The Bauschinger Effect of Metal Alloys and Its Application in Industrial Production． Beijing: Mechanical Industry Press， 1994 ( 马鸣图． 金属合金的包辛格效应及其在工业生产中的应用． 北京: 机械工业出版社，1994) ［6］ Li M． Hot die steel mechanical basis of thermal fatigue cracks． Mech Eng Mater，1993，17( 6) : 29 ( 李明． 热作模具钢热疲劳裂纹的力学基础． 机械工程材料， 1993，17( 6) : 29) ［7］ Paris P C，Erdogan F． A critical analysis of crack propagation laws． J Basic Eng，1963，85( 4) : 528 ［8］ Cui W C． A state-of-the-art review on fatigue life prediction meth￾ods for metal structure． J Mar Sci Technol，2002，7( 1) : 43 ［9］ Elber W． Fatigue crack closure under cyclic tension． Eng Fract Mech，1970，2( 1) : 37 ［10］ Miller K J． Behaviour of short cracks and their initiation: Part Ⅰ． A review of two recent books． Fatigue Fract Eng Mater Struct， 1987，10( 1) : 75 ［11］ Miller K J． The behaviour of short cracks and its initiation: Part Ⅱ． A general summary． Fatigue Fract Eng Mater Struct，1987， 10( 2) : 93 ［12］ Newmana J A，Piascik R S． Interactions of plasticity and oxide crack closure mechanisms near the fatigue crack growth thresh￾old． Int J Fatigue，2004，26( 9) : 923 ［13］ Vasudeven A K，Sadananda K，Louat N． A review of crack clo￾sure，fatigue crack threshold and related phenomena． Mater Sci Eng A，1994，188( 1 /2) : 1 ·71·