There isn’t anything in the Sunnah that these verses remove depression or get tranquility.
However, if a person on his own did that and hoping in attaining this goal with the grace of Allah, I believe that this is permissible as it is treatment and healing through the Quran.
Can we recite the 6 verses of sakeenah in the home everyday expecting for tranquility in the home? or should it be recited only at the time of depression? What is the correct instant for the verses of sakeenah to be recited?Should we make any dua after reciting it asking for sakeenah?