Vol.19 No.3 吴冬梅等：含铌钛钢X-⑤2连铸坯的高温延塑性 ·253· 参考文献 1 Ouchi C.Hot Dutility in Nb-bearing High-strength Low -alloy Steels.Trans ISIJ,1982,68:181 2 Funnel G D.Effect of Aluminium Nitride Particles on Hot Dutility of Steel.Met Tech,1978.5:150 3 Mintz B,Arrowsmith J M.Hot Ductility Behaviour of C-Mn-Nb-Al Steels and Its Relationship to Crack Propagation During the Straightening of Continuously Cast Strand.Met Tech,1979,6:24 4 Weiss I,Jonas J J.Stress Relaxation Method for Investigation of Softening Kinetics in Hot Deformed Steels.Metal Trans,1979,10A:831 5 Karjalaimen L P.Interaction Between Recrystallization and Precipitation During the High Temperature Deformation of HSLA Steels.Mater Sci and Tech,1995,6,11:557 Hot Ductility of Nb-Ti Containing X-52 Steel CC Slab Wu Dongmei)Wang Xinhua Li Jingjie)Fei Huichun2)Zhang L2 1)Metallurgy School,UST Beijing,Beijing 100083,China 2)Baoshang Iron and Steel Company ABSTRACT The hot ductility of Nb-Ti containing X-52 steel cc slab has been examined over the temperature range from the melting point to 700 C.The loss of hot ductility was analyzed according to the characteristics of fractures and precipitates.It was found that there exist two low ductility temperature regions within the tested temperature range,that is,Region I from the melting point to 1380 C and Region III from 925 ~825 C.In region II,the ductility loss is due to the dynamic precipitation of fine particles of NbCN at the austenite grain boundaries.The good effect of titanium on hot ductility is attributed to titanium reducing precipitation of the more detrimental NbCN and preventing the formation of ferrite films around the austenite grain boundaries. KEY WORDS Nb-Ti containing Steel,cc slab,hot ductility,dynamic precipitation〔 〕 吴 冬梅等 二含锭钦钢跳。 包连铸坯 的高温延 塑性 参 考 文 献 一 比 一 沈 助 一 姗 ， ， 飞 断 瓦 亡 ， ， 肠 ， 而 七 一 肠 卜月 陇 ， 七巧 仃 ， 】灭 玩 萄 。 巧 代 吃 琦 无 气 ， ， 一 一 ， ’ 几 翔 ’ 凡 枷 人 ， 及 百， ， ， 飞 ， 卜 面 删 讲 加比 飞 伪 面 ， ， 因 称 一 ℃ ， 别 川 七 而 ， ，