This one is pretty easy, but if you are having too much trouble try to get this achievement on EASY difficulty.
Basically you just gotta hurry. Use Gauntlet against the Orbital Frames to smash them into the wall. Once they hit the wall they will often fall behind you and the train. Spamming Gauntlet will help you dispatch them quickly.
As for the train cars themselves, there are about 5 of them. Use Homing Beam to deal with them as quickly as possible while using Dash to dodge their attacks.
I did this in less than 4 minutes on EASY and I'm honestly not that great a player.
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