What is the microstructure of Q345R?
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For Q345R, which is available in hot-rolled, controlled-rolling, or normalized heat-treated conditions, what is its main microstructural pattern? What is the organizational proportion?
Base metal: Ferrite + Pearlite
The microstructure of Q345R consists of ferrite and pearlite; the pearlite content in the normalized state is higher than that in the hot-rolled state
The answer above is correct; at room temperature, its microstructure consists of ferrite + pearlite, that is, cementite
Q345R is a hypoeutectoid steel, and its microstructure at room temperature consists of ferrite + pearlite
The microstructure of Q345R consists of ferrite and pearlite
It was originally thought to be ferrite. I checked later and it was ferrite + pearlite. From the microstructure diagram, there is more ferrite, accounting for about 80-90%, I’m not sure if that’s correct. Thank you all for your help.