The　hardness,　toughness　and　electrochemical　properties　of　the　Cr-N　coatings　were　studied　by　the　method　of　Ion　Beam　Enhanced　Deposition(IBED).　The　results　show　that　the　fraction　of　CrN　phase　and　its　hardness　increase　with　increasing　N-2　partial　pressure　and　N　ions　bombarding　energy　in　a　certain　range,　but　the　toughness　decreases.　When　the　N　ions:Cr　atoms　ratio　changes　from　1.45　x　10(-2),　3.67　x　10(-2)　to　5.87　x　10(-2),　Cr2O3　is　produced.　In　terms　of　corrosion　resistance,　the　coated　specimen　shows　a　slight　improvement　in　comparison　with　substrate　52100　steel.　The　Cr-N　coated　specimen　is　characterized　with　pitting　corrosion　by　penetrating　the　agent　through　the　defects　involved　very　thin　coating　layer.