Influence of phosphorous and boron on dynamic recrystallization and microstructures of hot-rolled interstitial free steel
Influence of phosphorous and boron on dynamic recrystallization and microstructures of hot-rolled interstitial free steel
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DOI：
10.1016/j.msea.2005.06.040
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发表时间：
2005-10
期刊：
影响因子：
6.4
通讯作者：
Sangho Kim;S. Choi;Yu-Si Lee
中科院分区：
文献类型：
--
作者：
Sangho Kim;S. Choi;Yu-Si Lee
研究了含铌钛无间隙原子（IF）钢中磷（P）和硼（B）对动态再结晶、力学性能和显微组织的影响。为此目的，选择了四种含不同P和B含量的Nb-Ti添加IF钢。采用热压缩试验研究了合金的动态再结晶行为。在中试热轧试验的基础上，采用单轴拉伸试验和电子背散射衍射（EBSD）分析了中试热轧IF钢板的力学性能和显微组织。结果表明，B在900-1100°C温度范围内对IF钢的动态再结晶有明显的抑制作用。而P对1100°C动态再结晶无延迟作用。P对动态再结晶的影响小于B。EBSD分析表明，P和B的缺乏导致细铁素体晶粒尺寸和许多大角度晶界。无P和B的IF钢的铁素体晶粒尺寸比具有0.1%P和0.001%B的IF钢的铁素体晶粒尺寸小46.4%。
This paper examines the effects of phosphorous (P) and boron (B) of Nb–Ti added interstitial free (IF) steel on dynamic recrystallization, mechanical properties and microstructures. For this purpose, four Nb–Ti added IF steels that contain different contents of P and B were selected. The dynamic recrystallization behavior was investigated using hot compression testing. Mechanical properties and microstructures of pilot hot-rolled IF steel sheet were analyzed as well using uni-axial tensile test and electron back-scattered diffraction (EBSD) following pilot hot rolling experiment. It has been found that B strongly retarded dynamic recrystallization of the IF steel in the temperature range of 900–1100°C. However, P did not delay dynamic recrystallization at 1100°C. The effect of P on dynamic recrystallization was less than that of B. EBSD analysis revealed that absence of P and B induced fine ferrite grain size and many high angle grain boundaries. The ferrite grain size of P and B free IF steel was 46.4% smaller than that of IF steel having 0.1% of P and 0.001% of B.