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时间:2019-03-07
《铸连轧非调质钢的强度计算及其预报》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、万方数据第40卷2004年12月第12期1248—1252页金属学跋ACTAMETALLURGICASINICAVbl.40NO.12Dec.2004PP.1248—1252连铸连轧非调质钢的强度计算及其预报刘志林刘伟东林成(辽宁工学院材料与化学工程学院,锦州121001)摘要非调质钢的强度为OL—Fe基体细化强度与固溶强化、奥氏体析出碳化物弥散强化、界面强化和过饱和铁素体析出碳化物的析出强化的强度增量之和.以细晶铁素体强度为基础,利用相最强键上的共用电子数nA及相界面电子密度差Ap计算了连铸连轧非调质钢固溶强化、界面
2、强化、弥散强化和析出强化的强度增量.给出了一组计算非调质钢连铸连轧终轧强度的公式.可根据化学成分和工艺规定的终轧晶粒尺寸计算终轧强度,或根据技术要求的强度给出相应的轧制晶粒尺寸与化学成分间的最佳组合.实现了化学成分一轧制晶粒尺寸一终轧强度的计算机预报.关键词连铸连轧,非调质钢,电子结构,强度计算与预报中图法分类号TGll3.25,0346文献标识码A文章编号0412—1961(2004)12-1248-05STRENGTHCALCULArI’IoNANDITSPREDICTIoNoFNoNQUENCHED—TEMPER
3、EDSTEELDURINGCoNTINUoUSCASTING—RoLLINGLIUZhilin.LIUWeidong.LINChengDepartmentofMaterialsandChemicalEngineering.LiaoningInstituteofTechnology,Jinzhou121001Correspondent:LIUZhilin,professor,Tel:(041创4198671,E—mail:lgveslwd@sina.cornSupportedbyNationalNaturalScienc
4、eFoundationofChina(No.50271030.)Manuscriptreceived2003-11-17,inrevisedform2004-03-04ABSTRACTThestrengthofnonquenched-temperedsteelconsistsofthestrengthoffine-graineda—Fematrix,solution—strengthening,interface—strengthening,dispersion-strengthening(carbidesfromau
5、stenite),andseparation-strengthening(carbidesfromoversaturatedferrite).BasedonthestrengthofOL—Fematrix.thestrengtheningincrementsoftheabovefourmechanismsarerespectivelycalculatedwiththeelectronnumbernAonthestrongestbondinalloyingphaseandelectrondensitydifierence
6、Aponbiphaseinterface.AsetofstrengthcalculatedequationsisproposedwiththestrengtheningfactorsandtheweightsofCandalloyingelementsfM)innonquenched-temperedsteel,andusedincalculationoftheend-rolledstrengthofnonquenched—temperedonthebasisofcompositionandthegrainsizeaf
7、terrolling.Inopposition,theoptimizationbetweencompositionandthegrainsizecanbeaccomplishedonthestrengthproposedbytechnicalstandard.So,theend—rolledstrengthpredictionfromcomposition,andgrainsizecanbecarriedout.KEYWORDScontinuouscasting-rolling,nonquenched—tempered
8、steel,valenceelectronstruc—ture,strengthcalculationandprediction非调质钢的强化机制包括固溶强化、界面强化、弥散强化、析出强化及轧制细化.连铸连轧的非调质钢不存在7oOL-÷1相变及碳化物的析出一再溶过程,因此相的相对数量容易计算.这也是本文选择连铸连轧非调质钢+国家自
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