文档介绍：(∗()110016)Ae3,,,Ae3,(3µm)−1,,;10s−1,,,Q235250MPa510MPa,615MPa,,,,,TG1111005-3093(2010)02-0175-07TheFormationandMechanicalPropertiesofDeformationInducedFerriteaboveAe3TemperatureHAOLuhanXIAONaminZHENGChengwuLIDianzhong∗∗(ShenyangNationalLaboratoryforMaterialsScience,InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016)*,2009;inrevisedformOctober21,2009.**Towhomcorrespondenceshouldbeaddressed,Tel:(024)23971281,E–mail:******@-singlepass-heavydeformationinlowcarbonsteelwascarriedoutusingGleeble3500thermal-,(DIFT)aboveAe3isresponsiblefortheultra-finegrainsize(about3μm).−,eslargerandthegrainsizesmalleruntilDIFissaturatedatthestrainrateof10s−,theyieldstrengthcanbeimprovedfrom250MPato510MPaandthetensilestrengtharrivesat625MPa,,tensionmechanicalproperties,deformationinducedferritetransfor-mation,stainrate,lowcarbonsteel(deformationinduced,ferritetransformation,DIFT),(TMCP)[2−13][1],,,TMCP5–10μm,,,Ar3Yada[2]X*[3–8]2009713;200910.,DIFT:,1–2μm,DIFT176Ae3–Ar3[5]Ae3–Ar3,Ae3,DIFT[7,8]Priestner[6],Ae3–Ar3,[5,8,10],DIFTGleeble3500,6–8mm12–15mm,,,[9]Gleeble3500Ae3,–,,1,Q235(),(),8mm15mmGleeble3500,,Thermo–Calc–Ae3,822870850,–,25,Ae3A:950(105min/s),1/positionofthesteelstudied(massfraction,%),20s−180%()−1,−1,−1,−1,5s−1,