No.
I could only find 5 occasions when God hardened anyones heart.
Four verses were references to Pharaoh and the egyptians. (Exodus 4:21, 7:3, 14:4,17).
One reference in Joshua was to the kings of "all that land, the hills, and all the south country, and all the land of Goshen, and the valley, and the plain, and the mountain of Israel, and the valley of the same;"
Joshua 11:20 "For it was of the LORD to harden their hearts, that they should come against Israel in battle, that he might destroy them utterly, and that they might have no favour, but that he might destroy them, as the LORD commanded Moses."
So… I say "No" to your question does God ever harden the hearts of believers.
All the other verses i found were pleading with believers to not harden you heart. Believers, then, have a choice...
Hebrews 3:8,9 "Wherefore (as the Holy Ghost saith, To day if ye will hear his voice, Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:"
If we will hear his 'still small' voice - today we must exercise our gift of free will and reveal of what nature is our heart; because God is not finished with those who (like pharaoh) do not harken to his voice.
2 Thes 2:11,12 "And for this cause God shall send them strong delusion, that they should believe a lie: That they all might be damned who believed not the truth, but had pleasure in unrighteousness."