275Vol.27No.5200510JournalofUniversityofScienceandTechnologyBeijingOct.2005122.11Fig.1Sketchmapoftemperaturecontrolduringtensiletests1()Table1Chemicalcompositionofthesamples•546•200552.233.13.22Fig.2Changeintensilestrengthwithtemperatureforhighcar-bonsteel3Fig.3Variationofareareductionwithtemperatureforhighcar-bonsteelVol.27No.5•547•3.3T3.4441375A(a),B(b)Fig.4SEMsoffracturesurfaceforhighcarbonsteelsA(a)andB(b)testedat13755750A(a),B(b)Fig.5MicrostructuresofhighcarbonsteelsA(a)andB(b)fracturedat750•548•20055ISIJIntISIJIntTetsu-to-HaganeTetsu-to-Hag-aneMaterSciTechnolMaterSciTechnolWANGXinhua,ZHUGuosen,YUHuixiang,WANGWanjunABSTRACTKEYWORDS