Vol19 管克智等：紫铜热变形流动应力的实验研究 ·17· Flow Stress of Red Copper at Hot Deformation Guan Kezhi Fan Bailin Zhou Jihua Co;:ege of Mechanical Engineering,USTB.Beijing 10083,PRC) ABSTRACT This paper mainly studies the mathematical models for flow stress of red cop- per by doing experiment with a cam plastometer at a constant deforming rate.The paper provides many flow stress diagrams concerning red copper under different strain temperatures, different strain rates and different deformation degrees.At the same time,on the foundation of analyzing and comparing the regression results of nonlinear models,mathematical models of high accuracy for flow stress was put forward. KEY WORDS red copper,flow stress,mathematical model,cam plastometer ⊙●⊙年⊙年⊙⊙年⊙米O年⊙⊙米⊙O◆*今⊙⊙*⊙#◇票◇年⊙米◇⊙⊙中*⊙⊙⊙##⊙单O*C年⊙南QO第OC年◇⊙年⊙ (上接第8页) 2李中华等.钻杆接头螺纹在拉伸载荷下弹塑性有限元分析.石油专用管，19941)：53~56 Finite Element Analysis of Casing Threads under Tensile Load Zang Yong College of Mechanical Engineering,USTB,Beijing 100083,PRC ABSTRACT This paper discusses the mechanical behavior of the API 8 Round casing con- nection under tensile load by the FEM,the regular pattern of stresses/strain distribution along pin/box has been given. KEY WORDS casing,thread,FEMV bl . 19 管克智等 : 紫铜热变形流动应力 的实脸研究 l 7 F l o w S t res s o f R ed C o P pe r a t H o t 氏fo 们m 以t i o n G u a n K 改h i 于h n B a i li n Z h ou Ji h u a 吻; ;卿 of M eC 如知 i司 E 吧~ ng , US 珊 , eB ij ng IJ 粥 3 , P R C) A 狡汀R A C T hT is p a p er am iul y st du ies hte anI ht ~ t lca l om d els of r ofl w s t n 岌洛 of 耐 co p - Per b y d o ign xe P enm t iw t h a ca m Pl as ot n 玲te r a t a co ns at n t d e of nm g ar te . hT e P a P er Por v id 巴 am n y fl o w st l℃骆 d in g ar ms co n cenu g dre co P P er u n d er d迁re re n t s iat in te lr 甲aer t u n 乏 , d i fe er n t s xat i n ar 此 a n d d i fe er n t d efo an it o n d eg 端 . iA ht e sa 此 t毗 , o n ht e fo un d a iot n o f a n a ly 乙 n g a n d co m Pa n n g ht e 啡端io n esr ul st o f no ilr ane r mo d els , anr ht e r 迢 t ica l mo d els o f h ig h a c c u r a cy fo r fl o w s t l璐s ~ P u t fo 哪心 . K E Y W O R D S 耐 co P Per , flo w s t n 泛洛 , anr t he anr t i以 1 mo d el , ca m P l a s t o n 此 et r ( 上 接第 8 页 ) 2 李 中华等 . 钻杆接头螺纹在拉 伸载荷下弹塑性 有限元分析 . 石油专用 管 , 1男叫l) : 53 一 56 F iin te E l e me n t A卫a lys is o f C as ign u n d e r eT ns il e L o a d aZ gn y’o ” g oC n卿 of M eC h a n i司 E卿~ gn , sU BT , 决巧Ing l 〕叉)83 , P R C A R 汀R A 〔T hT is P a Per d is c 侧骆巴 ht e n 袄℃h a n ica l be h a vi o r o f ht e AP I S R o u n d 哪m g co n - n 。 =t io n u n d e r t e ns ile l o a d b y ht e F E M , t h e er g ul a r P a et m o f s t n 污 , 乏 s/恤 in d is itr b u t i o n a fo n g Pin b/ o x h as b 沈 n g i v e n · K E Y W O RD S 以 s i n g , t h雌d , F E M