DXF is a common 2D/CAD format so it should not be a problem to find a program that can import it and work with it. However finding a program that can export to Autodesk Inventor formats (without the obvious Inventor here) will be a lot more trickier because it is not that well supported. Still it should definitly be possible.
Convert AutoCAD DXF Drawing Exchange Format to AutoDesk Inventor CAD part.
We found 2 software records in the database related to .dxf to .ipt file format conversion.
Microsoft Windows software - convert dxf to ipt on Windows
Autodesk Inventor is modeling application used to create 3D digital prototypes.
Convert from dxf file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned dxf to ipt. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A 2D and 3D CAD construction software