117mm厚Ni-Cr-Mo-B超厚板不同位置处的OM像。
OM images of the Ni-Cr-Mo-B ultra-heavy plate at different positions (LMT—tempered lath martensite, LBT—tempered lath bainite, GBT—tempered granular bainite) (a) 1 mm (b) 6 mm (c) 11 mm (d) 14 mm (e) 19 mm (f) 24 mm (g) 27 mm (h)53 mm (i) 58 mm。