在Gleeble-1500热模拟试验机上进行了热拉伸试验和单道次热压缩变形试验,研究了254SMo的热塑性以及变形温度、变形速率等对其热变形行为的影响。根据热拉伸试验,确定了254SMo的最佳热塑性温度区间为1 200～1 250℃,热加工温度区间窄;由热压缩试验获得了254SMo的热变形激活能Qdef,并分析了再结晶机制,建立了254SMo的Z-Hollomen参数方程。
The effects of deformation temperature and deformation rate on the deformation behavior and hot ductility of 254SMo were investigated through single pass compressing test and hot tensile testing. In the experimental deformation conditions, dynamic recrystallization was observed for all samples. Based on hot testing result, the best hot ductility temperature interval of 254SMo was determined. According to the stress strain data, the deformation activation energy Qdct for 254SMo was calculated, and its mechanism of dynamic recrystallization was analyzed, the Z-HoIlomen parameter equation was also established.
参考文献
| [1] | 孙长庆.超级奥氏体不锈钢的发展,性能与应用（上）[J].化工设备设计,1999(06):38-43. |
| [2] | Dudova N;Belyakov A;Sakai T.Dynamic Recrystallization Machanisms Operating in a Ni-20%Cr Alloy Under Hot-To- Warm Working[J].Acta Materialia,2010(58):3624. |
| [3] | MAO P L;SUG Y;YANG K .Dynamic Recrystallization of as Cast Austenite in 18-8 Stainless Steel[J].Mater Sci Tcchnol,2002,18(08):892. |
| [4] | 何宜柱,陈大宏,雷廷权,齐藤良行.形变Z因子与动态再结晶晶粒尺寸间的理论模型[J].钢铁研究学报,2000(01):26-30. |
| [5] | Momeni A;Dehghani K;Keshrniri H.Hot Deformation Behavior and Microstructural Evolution of a Superaustenitic Stainless Steel[J].Materials Science and Engineering A,2010(527):1605. |
| [6] | A. Hoseini Asli,A. Zarei-Hanzaki.Dynamic Recrystallization Behavior of a Fe-Cr-Ni Super-Austenitic Stainless Steel[J].材料科学技术学报（英文版）,2009(05):603-606. |
| [7] | 陆世英.不锈钢[M].北京:原子能出版社,1995 |
| [8] | 余永宁.金属学原理[M].北京:冶金工业出版社,2000 |
| [9] | Sang-Hyun CHO;Ki-bong KANG;John J. JONAS .Mathematical Modeling of the Recrystallization Kinetics of Nb Microalloyed Steels[J].ISIJ International,2001(7):766-773. |
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