摘要
对低碳带钢进行多道次常规冷轧(原始厚度为2.5 mm,轧后厚度为0.4 mm,总压下量为84%),研究退火工艺对冷轧板组织和性能影响。结果表明:轧制完成后,晶粒明显拉长,出现了较高密度的位错。随退火温度升高,位错密度显著下降,晶粒得到细化,550℃时,形变组织完全消失,再结晶过程结束,位错密度为1.34×1014m^(-2),晶粒尺寸1.24μm。退火温度高于550℃时,晶粒尺寸不断长大,试样的表面活化能高达278 k J/mol。550℃最佳退火温度下,保温时间达到60 min时,再结晶基本完成,显微硬度下降明显,伸长率增加。
Low carbon strip steel was cold rolled by conventional muhi-pass cold rolling （ original thickness 2.5 mm cold roiled to 0.4 mm with reduction of 84% ）, and effect of annealing on mierostructure and mechanical properties of cold rolled sheet was investigated. The results show that after rolling, the grains are elongated significantly and high density dislocation appeared. With increasing annealing temperature, dislocation density decreases significantly and grains are refined. At 550 ℃, the deformed microstrueture completely disappears, the recrystallization finishes, dislocation density is 1.34 × 10^14 m-2, the average grain diameter is 1.24 μm. When annealing temperature is above 550 ℃, the grain size increases, and the surface activation energy of the sample is as high as 278 k J/mol. When annealed at 550 ℃ for 60 min, the recrystallization is basically finished, and the microhardness decreases obviously and the elongation increases.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第6期106-111,共6页
Heat Treatment of Metals
关键词
低碳带钢
退火
再结晶
组织
活化能
low carbon strip steel
annealing
recrystallization
microstructure
activation energy
