The　microstructure,　hardness,　impact　toughness　and　ring　block　wear　properties　of　a　novel　bainitic　steel　were　investigated　by　means　of　scanning　electron　microscopy　(SEM),　transmission　electron　microscopy　(TEM),　laser　confocal　microscopy　(LCM),　X-ray　diffraction　(XRD),　Rockwell　hardness　tester,　impact　tester　and　MM-200　wear　tester　(Jinan　Sida　Testing　Technology　Co.,　LTD,　China).　The　above　steel　was　austenitized　at　900　degrees　C,　and　was　isothermally　quenched　at　250,　280,　310,　340,　370,　400　and　430　degrees　C　respectively.　The　results　showed　that　the　microstructure　of　the　bainitic　steel　was　mainly　composed　of　bainitic　ferrite　(BF),　retained　austenite　(RA),　and　martensite/austenite　(M/A).　A　part　of　the　RA　underwent　a　phase　transition　and　transformed　into　martensite　during　the　wear　process,　resulting　in　the　increase　of　the　hardness.　The　wear　morphology　of　bainitic　steel　was　dominated　by　straight　furrows.　The　wear　mechanisms　were　mainly　abrasive　wear　and　oxidative　wear.　With　the　increase　of　the　austempering　temperature,　the　microstructure　coarsened,　the　amount　of　the　blocky　RA　content　increased,　the　hardness　of　the　high　silicon　bainitic　steel　increased　slightly　first　and　then　decreased,　the　impact　toughness　improved　significantly　first　and　then　reduced,　and　the　wear　resistance　increased　first　and　then　decreased.　Under　the　same　test　conditions,　the　high　silicon　bainitic　steel　after　austempering　at　340　degrees　C　had　better　combination　of　hardness　and　toughness,　stable　and　low　friction　coefficient,　and　excellent　wear　resistance.　(C)　2020　The　Authors.　Published　by　Elsevier　B.V.　This　is　an　open　access　article　under　the　CC　BY-NC-ND　license　(httplicreativecommens.org/licenses/by-ne-nd/4.0/).