针状铁素体组织的纳米硬度

Nano Hardness of Acicular Ferrite Microstructure

以Mn-Mo-Nb-B微合金系统为研究对象,利用动态连续刚度测量纳米压痕技术,结合低碳微合金钢中针状铁素体组织的特点,分析针状铁素体组织的纳米硬度-位移曲线,计算针状铁素体组织的基体纳米硬度。结果表明:针状铁素体组织的基体纳米硬度为2.14GPa,波动为29.37%,与动态CSM方法提供的原始结果相比,通过对特定显微组织的纳米硬度-位移曲线分析而得出的纳米硬度数据的波动显著减小。

Dynamic continuous stiffness measurement （CSM） nanoindentation method was applied to measure nano hardness of acicular ferrite in low carbon microalloying steels （Mn-MoNb-B）.The nano hardness-displacement curves of acicular ferrite were analyzed,and the matrix hardness was calculated.The results show that the matrix nano hardness of acicular ferrite microstructure is 2.14GPa,and the fluctuation is about 29.37%.Compared with the original results gained by dynamic CSM,the fluctuation obtained from the nano hardness-displacement curves of acicular ferrite significantly reduced.