锻压技术

镍基耐蚀合金G3后动态再结晶行为研究

英文标题：Postdynamic softening behavior of nickelbase corrosion resistant alloy G3

作者：王珏董建新张麦仓郑磊

单位：北京科技大学

分类号：TG302;TG146.2

出版年,卷(期):页码：2012,37(2):143-147

摘要：

为了研究镍基耐蚀合金G3的后动态再结晶软化行为，在1100~1200℃，0.1~10s-1的变形条件范围内，进行了3种方式的热压缩：变形量为15%和60%单道次热压缩，15%+15%的双道次热压缩和15%热压缩并保温。得出以下结论：在变形温度范围内，15%变形量的第1道次压缩使G3合金发生动态再结晶，使其在后续保温过程中发生由亚动态和静态再结晶共同控制的后动态再结晶软化行为；并进一步得出G3合金的后动态再结晶动力学受应变速率影响，但最终的软化率只随温度而改变；通过15%压缩和保温获得的后动态再结晶组织均匀性低于压缩60%的动态再结晶组织。

In order to investigate the post-dynamic softening behavior of nickel-base corrosion resistant alloy G3, three types of hot compression: single-hit with deformation of 15% and 60%, double-hit with deformation of 15%+15%, single-hit with 15% deformation followed by various holding time were carried out over the temperature range of 1100 to 1200℃, and at the strain rates of 0.1, 1 and 10s-1. The results show that dynamic recrystallization occurs when G3 alloy is compressed with deformation of 15%. Post-dynamic softening is observed during the holding time after deformation, which is governed by meta-dynamic and conventional static recrystallization concurrently. The kinetics of post-dynamic softening for G3 alloy is influenced by strain rate. However, with the same strain, the final softening rate is decided by temperature only. The homogeneity of microstructure after post-dynamic recrystallization is worse than that of dynamic recrystallization after 60% compression.

基金项目：

国家自然科学基金资助项目（50831008）

参考文献：

［1］陈长风，范成武，郑树启,等. 高温高压H2S/CO2 G3合金表面的XPS分析[J]. 中国有色金属学报，2008，11（11）： 2050-2055.
［2］崔世华，李春福，荣金仿,等. 镍基合金G3在高含H2S/CO2环境中的腐蚀影响因素研究[J]. 热加工工艺，2009，38（6）：29-34.
［3］佟梅，包耀宗，董瀚,等. 高酸性气田用油管材料G3、825合金的高温变形特性[J]. 机械工程材料，2009，33（2）：56-58.
［4］罗坤杰，张麦仓，王宝顺,等. Hastelloy G3合金热变形特性研究[J]. 稀有金属材料与工程，2011，40（4）：605-609.
［5］苏玉华，包耀宗，董瀚,等. 镍基耐蚀合金GH536B（G3）的高温变形特性[J]. 特殊钢，2008，29（1）：31-33.
［6］Uranga P, Fernandez A I, Lopez B, et al. Transition between static and metadynamic recrystallization kinetics in coarse Nb microalloyed austenite[J]. Materials Science and Engineering A, 2003, (345):319-327.
［7］Roucoules C, Hodgson P D, Yue S, et al. Softening and microstructural change following the dynamic recrystallization of austenite[J]. Metallurgical and Materials Transactions A, 1994, (25A): 389-400.
［8］Roucoules C, Yue S, Jonas J J. Effect of alloying elements on metadynamic recrystallization in HSLA steels[J]. Metallurgical and Materials Transactions A, 1995,(26A):181-190.
［9］Sakai T. Dynamic recrystallization microstructures under hot working conditions[J]. Journal of Materials Processing Technology, 1995,(53): 349-361.
［10］Sakai T, Ohashi M, Chiba K, et al. Recovery and recrystallization of polycrystalline nickel after hot working[J]. Acta Metallurgica, 1988, (36): 1781-1790.
［11］Sakai T, Jonas J J. Overview no.35 dynamic recrystallization: Mechanical and microstructural considerations[J]. Acta Metallurgica, 1984,(32):189-209.

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