用扭转实验方法,对低碳锰铌钢进行了研究.建立了幂函数形式的本构方程.确定了稳态流变应力与热塑性之间的关系.考虑到累积应变效应,对动态再结晶过程进行了初步研究.分析了温度、应变率、Nb(CN)沉淀对动态软化百分数的影响.动态再结晶过程中,激活能和应力指数的变化,在一定程度上反映了Nb(CN)的沉淀.定义(?)/(?)为沉淀指数,用以定量地说明温度,应变率对Nb(CN)沉淀过程的影响.此外,还对应变率敏感系数与温度,剪切应变之间的关系进行了研究.
The hot torsion tests on low-carbon Mn-Nb steel were carried out of the es-tablishment of the constitutive equation of the power function and of the deter-mination of the relationship between flow stress of a steady state and hot ductility.An approach to the process of dynamic recrystallization was also made after con-sideration in the effect of strain accumulation.The influences of temperature,strain rate,Nb(CN)precipitation on the dynamic fractional softening have beenanalyzed.During dynamic recrystallization,the variation of activation energy orstress exponent reflects the precipitation of Nb(CN)to a certain extent.The effectof temperature and strain rate on the Nb(CN)precipitation may be quantitativelyillustrated by(?) which is defined as so-called precipitation exponent.Furthermore,the correlation among the strain rate sensitivity,temperature and shear strain hasalso been studied.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] | |
| [16] | |
| [17] | |
| [18] | |
| [19] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%