通过双道次压缩试验研究了Nb-Ti微合金钢的静态再结晶行为,确定了应变诱导沉淀析出前Nb-Ti微合金钢的静态再结晶激活能,并建立了静态再结晶动力学模型。采用面积法及积分-能量法计算的软化率,很好地反映了微合金钢的静态再结晶行为及应变诱导沉淀析出行为。应变诱导沉淀析出的鼻尖温度在900～925℃之间,静态再结晶的临界温度（SRCT）高于950℃。
The static recrystallization behavior of Nb Ti microalloyed steel was investigated by two-stage interrupted compression testing. The static recrystallization activation energy of Nb-Ti microalloyed steel was determined and the static recrystallization kinetics model was established before strain-induced precipitation. The area measurement method and the integral-energy approach were used to calculate softening ratio which well reflected static recrystalli- zation behavior and strain-induced precipitation behavior of the microalloyed steel. The softening ratio changes well reflect the evolution of microstructure and precipitates. The nose temperature of strain-induced precipitation was between about 900℃and 925℃,and the static recrystallization critical temperature was higher than 950℃.
参考文献
| [1] | 朱松鹤,戴兵,张梅,卫品官,张恒华.含Nb-Ti低碳微合金钢双道次高温压缩软化行为[J].材料热处理学报,2010(10):53-57. |
| [2] | 小指军夫;李伏桃.控制轧制控制冷却--改善材质的轧制技术发展[M].北京:冶金工业出版社,2002 |
| [3] | 翁宇庆.超细晶钢一钢的组织细化理论与控制技术[M].北京:冶金工业出版社,2003 |
| [4] | 尚成嘉,杨善武,王学敏,贺信莱,刘振清,陈庆平.RPC对800 MPa级低合金高强度钢的影响[J].北京科技大学学报,2002(02):129-132. |
| [5] | Ghosh A.;Das S.;Chatterjee S.;Mishra B.;Rao PR. .Influence of thermo-mechanical processing and different post-cooling techniques on structure and properties of an ultra low carbon Cu bearing HSLA forging[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):299-308. |
| [6] | Jonas J J;Weiss I .Effective of Precipitation on Recrystalliza- tion in Microalloyed Steels[J].Metal Science Journal,1979,13(3-4):238. |
| [7] | Kwon O;Deardo A J .Interaction Between Recrystallization and Precipitation in Hot Deformed Microalloyed Steels[J].Acta Metallurgica Et Materialia,1991,39(04):529. |
| [8] | Hong S G;Kang K B;Park C G .Strain-Induced Precipitati- on of NbC in Nb and Nb-Ti Microalloyed HSLA Steels[J].Scripta Materialia,2002,46:163. |
| [9] | Dutta B;Sellars C M .Effect of Composition and Process Variables on Nb(C,N)Precipitation in Niobium Microalloyed Austenite[J].Materials Science and Technology,1987,3(03):197. |
| [10] | Medina S F;Quispe A;Goamez M .Model for Static Recrys- tallization Critical Temperature in Mieroalloyed Steels[J].Materials Science and Technology,2001,17(05):536. |
| [11] | Laasraoui A;Jonas J J .Recrystallization of Austenite After Deformation at High Temperatures and Strain Rates-Analysis and Modeling[J].Metallurgical and Materials Transactions,1991,22A(01):151. |
| [12] | Frost H J;Ashby M F.Deformation-Mechanism Maps[M].Oxford:pergamon Press,1982 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%