G115钢在650℃下时效8791 h后的大小角晶界频率及数量密度，小角晶界（＜10°）频率为44.7%，大角晶界频率（10~60°）为55.3%，小角晶界数量密度为0.77 μm/μm2，大角晶界数量密度为0.49 μm/μm2。

The frequency and number density of large and small-angle grain boundaries of G115 steel aged at 650°C for 8791 h. The frequency of small-angle grain boundaries (<10°) is 44.7%, the frequency of large-angle grain boundaries (10~60°) is 55.3%, and the small-angle grain boundaries are 55.3%. The number density is 0.77 μm/μm2, and the number density of large-angle grain boundaries is 0.49 μm/μm2.