The　equilibrium　solidified　and　the　vertical　section　phase　diagrams　of　Fe-C　pseudo-binary　were　drawn　with　different　chromium　content　(Fe-3.0%C-10.0%V-0.8%Si-0.8%Mn-X%Cr,　X=2.0,　5.0,　10.0,　mass　fraction)　by　the　Thermo-Calc　software.　The　effect　of　chromium　on　the　phase　diagrams　and　solidification　microstructure　was　investigated　by　OM,　SEM,　EDS,　XRD,　DSC　and　wear　resistance　test.　The　results　show　that　the　changes　of　eutectic　transition　points　and　phase　region　area　are　tiny　with　the　increase　of　chromium　content.　The　calculated　temperatures　of　precipitated　phase　are　close　to　the　DSC　results.　The　solidification　microstructure　is　composed　with　α-Fe,　MC,　and　M7C3.　Chromium　is　mainly　distributed　in　α-Fe　and　M7C3　carbides.　With　the　increase　of　chromium,　the　amount　of　MC　decreases　and　the　amount　of　M7C3　increases;　the　α-Fe　has　no　change.　The　hardness　of　the　cast　alloy　increases　with　the　increase　of　chromium　content,　and　the　maximum　value　reaches　to　67.0HRC　when　chromium　content　is　10.0%.　The　wear　loss　is　about　15.6mg　when　the　chromium　content　is　5.0%,　the　wear　resistance　is　the　best.　©　2018,　Journal　of　Materials　Engineering.　All　right　reserved.