The　microstructures　of　Fe-B　alloys　containing　different　carbon　and　boron　concentrations　have　been　investigated.　The　solidification　microstructures　of　Fe-B　alloy　consist　of　the　eutectic　boride,　pearlite,　and　ferrite.　Borides　precipitate　along　the　grain　boundary　during　the　formation　of　eutectic.　After　heat　treatment,　the　phases　in　Fe-B　alloy　are　composed　of　the　boride　and　martensite.　With　increase　of　carbon　and　boron　concentrations,　the　Rockwell　hardness　of　Fe-B　alloy　becomes　larger.　Meanwhile,　by　using　a　pin-on-disk　abrasion　tester,　the　effects　of　carbon　and　boron　concentrations　on　the　wear　behaviors　including　ploughing　depth,　roughness,　and　wear　weight　loss　under　different　loads　have　been　studied.　The　results　show　that　the　wear　resistance　of　Fe-B　alloy　with　higher　carbon　and　boron　concentrations　is　comparable　with　the　high　chromium　white　cast　iron.