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金属学报(英文版) 2000
EFFECT OF COPPER AND BORON CONTENT ON STRAIN-INDUCED Nb(C,N) PRECIPITATION IN ULCB STEELS AT HOT DEFORMATION TEMPERATUREKeywords: stress relaxation,strain-induced precipitation,ULCB steels Abstract: 1.IntroductionUltra-LowCarbonBainitic(ULCB)steels,whichhaveall-purposehighstrengthandtoughness,havebeendevelopedformorerecenttwentyyearsaroundtheworld.Thekineticsofstrain-inducedprecipitationoccurredinthiskindofsteelhavebeeninvestigatedindepth,anditisfoundthatmostoftheprecipitation-time-temperature(PPT)curvesareofC-shapedif--6].Theresearchesdealingwiththeinfluenceofalloyingelementsontheprecipitationalsohavebroughtoutsomevaluableresults.Heetal7]reportedthatboroninNbmicroalloyedULCBsteel…
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