The　Cr-N　coating/AISI52100　substrate　bonding　strength　with　different　dynamic　recoiling　intermixing　processes　were　evaluated　by　Rockwell-R　adhesion　(P-c)　and　spherical　rolling　contact　fatigue　tests.　The　results　show　the　coatings　are　of　an　excellent　bonding　strength　at　low　bombarding　energy　of　10keV　and　20keV　N　ion　dynamic　recoiling　intermixing.　With　bombarding　energy　increasing　from　10keV　and　20keV　to　40keV,　the　Rockwell-R　adhesion　(P-c)　is　650N,　700N　and　330N,　and　fatigue　life　(Delta　tau(rz)=442MPa)　decreases　from　5.0x10(6)　to　9.0x10(5).　The　results　of　P-c　and　spherical　rolling　contact　fatigue　strength　possess　resemble　tendency.