ABS have more shrinkage than PLA. If you have thick corner on your model, the material have internal force to warp. There are some technic to solve this problem:

1) Changing to PLA is the easiest way to solve this problem.

2) Add a thin extension pad around the corner can increase stickiness to the platform.

3) Reduce thickness of corner, ex: add hole on thick wall.

4) Reduce distance between nozzle and platform, heat platform to 85C degree. To increase stickiness.

Reference for advance user: Increase heat bed output power