G115钢在650℃下时效659 h后的大小角晶界频率及数量密度，小角晶界（＜10°）频率为44.0%，大角晶界频率（10~60°）为55.9%，小角晶界数量密度为0.79 μm/μm²，大角晶界数量密度为0.47 μm/μm²

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The frequency and number density of the large and small-angle grain boundaries of G115 steel after aging at 650℃ for 659 hours, the frequency of small-angle grain boundaries (<10°) is 44.0%, the frequency of large-angle grain boundaries (10~60°) is 55.9%, and the small-angle grain boundaries The number density is 0.79 μm/μm2, and the number density of large-angle grain boundaries is 0.47 μm/μm2.