Generally a CCT will show general structure ranges and I see that this one does not label them. It does not appear that any of the curves goes through a martensitic transition. The faster curves may be bainite+pearlite+ferrite, the slower ones pearlite+ferrite. The circled numbers are the final hardness but also should include a scale as to whether they are Vickers or Brinell. Not the best presentation of a CCT.