Influence of annealing temperature on microstructure and tensile property of cold-rolled Fe-0.2C-11Mn-6Al steel
Influence of annealing temperature on microstructure and tensile property of cold-rolled Fe-0.2C-11Mn-6Al steel
复制标题
退火温度对冷轧Fe-0.2C-11Mn-6Al钢显微组织和拉伸性能的影响
DOI：
10.1016/j.matchar.2018.01.043
复制
发表时间：
2018-03-01
影响因子：
4.7
通讯作者：
Misra, R. D. K.
中科院分区：
文献类型：
--
作者：
Cai, Z. H.;Li, H. Y.;Misra, R. D. K.
为充分发挥带状等轴组织奥氏体的潜力，提高中锰钢的综合力学性能，对热轧Fe-0.2C-11Mn-6Al钢进行冷辊退火，细化晶粒。 650℃退火后的冷轧钢的极限抗拉强度显着提高，而总伸长率显着下降。退火冷轧钢拉伸性能的变化是由于随着淬火温度的升高，相变诱发塑性（TRIP）效应减弱，孪生诱发塑性（TWIP）效应增强。此外，奥氏体具有两种不同的形态：条状和粒状。虽然随着退火温度的升高，粒状奥氏体的晶粒尺寸增大，但奥氏体稳定性随着淬火温度的升高而增加，这与预期相反。这归因于再结晶引起的大奥氏体条的细化。
To fully realize the potential of austenite characterized by strip-like and equiaxed structure and enhance the comprehensive mechanical properties of medium-Mn steel, the as-hot-rolled Fe-0.2C-11Mn-6Al steel was subjected to cold roll annealing to refine the grain size. The ultimate tensile strength of the cold-rolled steel annealed at 650 degrees C was significantly enhanced, while the total elongation was markedly decreased. The variation in tensile properties of the annealed cold-rolled steel was due to weakening of transformation induced plasticity (TRIP) effect and enhanced twinning induced plasticity (TWIP) effect with increase in quenching temperature. Furthermore, austenite had two different morphologies, strip-like and granular. Though the grain size of granular austenite increased with increased annealing temperature, the austenite stability increased with increase in quenching temperature, which is contrary to the expectations. This is attributed to refinement of large austenite strips induced by recrystallization.