简介：分层的钢纤维增强了橡胶水泥(LSFRRC)，基于国家标准的要求具体的人行道的一种新类型试验性地被研究。从平凡水泥(PC)的曲折张力的力量的不同性质，橡胶水泥(RC)，分层的钢纤维增强了水泥(LSFRC)，LSFRRC被介绍。试验性的结果与RC相比证明LSFRRC的张力的力量被4.12%与PC相比改进，在13.75%。曲折张力的性质上的负担偏转曲线被提出。LSFRRC的曲折张力的坚韧索引I10与PC相比被改进10.32次。

简介：在海洋的结构合成的增强的眼镜纤维的使用正在变得更普通，特别地由于潜在的重量积蓄。在增强的聚合物(GRP)上层建筑和钢壳形成了的眼镜纤维之间的关节的机械反应被检验并且随后修改了通过当模特儿并且测试的一个联合程序改进性能。一个有限元素的模型被开发预言关节的反应。模型在在不同材料，进步损坏，大变丑理论，和一种非线性的压力紧张关系之间的接口考虑接触。预言进步失败，分析联合Hashin失败标准和最大的压力失败标准。结果表演压力反应在力量上有大影响并且关节适用。Balsawood钢接口被证明对关节的机械行为批评。在试验性的结果和数字预言之间的好同意被观察。

简介：Thispaperdescribesaseriesofexperimentalinvestigationsonseventeenspecimensofsteelreinforcedconcretespecialshaped(SRCSS)columnsunderlowcyclicreversedloadingusingparallelcrossheadequipment.NineT-shapedSRCcolumns,fourL-shapedSRCcolumnsandfour+-shapedSRCcolumnsweretestedtoexaminetheeffectsofshapesteelconfiguration,loadingangle,axialcompressiveratioandshear-spanratioonthebehavior(strength,stiffness,energydissipation,ductility,etc.)ofSRCSScolumnspecimens.Thefailuremodesandhystereticperformanceofallthespecimenswereobtainedinthetests.Testresultsdemonstratethattheshear-spanratioisthemainparameteraffectingthefailuremodesofSRCSScolumns.Thespecimenswithsmallshear-spanratioarepronetoshearfailure,andtheprimaryfailureplanesinSRCSScolumnsareparalleltotheloadingdirection.Asaresult,thereisasymmetrybetweenpositiveandnegativeloadingdirectionsinthehystereticcurvesoftheSRCSScolumns.Themajorityofdisplacementductilitycoefficientsforallthespecimensareover3.0,sothattheSRCSScolumnsdemonstrateabetterdeformationcapacity.Inaddition,theequivalentviscousdampingcoefficientsofallthespecimensaregreaterthan0.2,indicatingthattheseismicbehaviorofSRCSScolumnsisadequate.Finally,thesuperpositiontheorywasusedtocalculatethelimitsofaxialcompressiveratioforthespecimens,anditisfoundthatthetestaxialcompressiveratioisclosetoorsmallerthanthecalculatedaxialcompressiveratiolimit.

简介：CuprecipitationbehaviorsintwoCu-bearingausteniticantibacterialstainlesssteels,type304andtype317L,weresystematicallystudiedbyusingrelativelysimplemethodsformaterialsanalysis,includingmicro-hardness,electricalresistivity,electrochemicalimpedancespectroscopy,X-raydiffractionanddifferentialscanningcalorimetry.Theresultsindicatedthatafteragingatelevatedtemperature,themicro-hardness,electricalresistivity,electrochemicalimpedanceandlatticeconstantofthesteelwereallvariedatdifferentdegreesduetotheprecipitationandgrowthofCu-richphases.TheresultsalsoshowedthattheheatevolutionduringtheprocessofCuprecipitationcouldbesensitivelydetectedbymeansofdifferentialscanningcalorimetry,obtainningthestartingtemperature,peaktemperature,peakareaoftheCu-richprecipitation,andeventheactivationenergybycalculation.TheresultsconfirmedthattheCu-richphasedprecipitationintheCu-bearingausteniticantibacterialstainlesssteelshouldbeathermalactivationprocesscontrolledbyCudiffusion.AllthematerialsanalysismethodsusedinthisstudycanbemoresimpleandeffectiveforapplicationinR&DoftheCu-bearingantibacterialstainlesssteels.

简介：Inthisstudy,a600MPahot-rolledcorrosion-resistantsteelplateproducedbyaspecificcompanyisinvestigated.Edgejaggeddefectsandedgesurfacedefectsgeneratedonbothsidesofthestripduringproductionarecharacterizedandanalyzed.Theresultsindicatethatthedistributionofreoxidationgranulesislocatedunderneaththesurfacepeelandthatcopper-containinggranulesdiffusealongaustenitegrainboundaries.Thisphenomenoncombinedwiththechemicalcompositionandproductionparametersofastripindicatethatcopperbrittlenessleadstoedgejaggeddefects.However,thesurfacedefectsshouldbeattributedtoinherentdefectsonthesurfaceofthestrip.Measuresthatpreventsurfaceoxidationandcoppersegregationatgrainboundarieswouldlikelyeliminatethesetwotypesofedgedefects.

简介：Thereisanincreasingtrendforproducingcopper-containingsteels,withcopperbeingeitheraresidualelementfromscrapsoranintentionaladdition,i.e.,inweatheringsteel.Theissueofsurfacehotshortnessoccursduringthehotworkingofsteelscontainingcopper,andasignificantamountofworkhasbeenperformedonthistopic.Thispaperprovidesareviewofrelatedstudiesonthisphenomenon.Theformationmechanism,asanalyzed,istheliquidmetalembrittlementcausedbytheliquidcopperpenetrationintoaustenitegrainboundariesatthemetalsurface,wherethecopperoriginatesfromtheselectiveoxidationofthesteelathightemperature.Onthebasisofthemechanism,moreimportanceisplacedonanalyzingtheeffectonthephenomenonbyvaryingthecontrollingfactors,includingtheheatingprocess,alloyingadditions,anddeformationconditions.Possiblesolutionstotheproblemarefinalized,andsomefurtherworkmustbeperformedinthefuture.

简介：Thisstudyexaminesmechanismsforprovidingnucleitoequiaxedgrainsintheweldsofpureferriticstainlesssteel(FSS).TheadditionofthealloyelementTitopureFSS439causestheprecipitationofTiN,whichcanbenefitthecolumnar-to-equiaxedtransition(CET)ofgastungstenarcwelding(GTAW).Meanwhile,theinitialmorphologyoftheprecipitates,theconcentrationmultiplicationsofTi,N,etc.ofFSS439shouldbecontrolledtoinducetheformationofCETduringtheshortweldingprocess.

简介：Accordingtothespecificationofsuperalloy-stainlesssteelarcbrazingandcharacteristicofthebasemetal,abestfillermetalwhichhasrelativelowermeltingpoint,nicewettability,goodweldforming,andadequateshearstrengthwasresearched.TheexperimentresultsshowthatwettabilityofCuFeMnonthestainlesssteelisverypoor,concomitantwithamassofpurplesootduringtheweldingwhichdeterioratestheworkingcondition.CuSiMnhasthebestwettabilityonboththesuperalloyandstainlesssteel,butthereremainsalotofpitandslagonthesurfaceoftheweldbead.Copper-basedsolderhasthehighestmeltingpointanditswettabilityandclearancefillabilityareweakerthanCuSi3.WettabilityandclearancefillabilityoftheCuSi3arethebestinallthecandidatefillermetals,anditsweldissmoothnessandhashighershearstrength.Foritscomprehensiveability,CuSi3isselectedasthefinalfillermetal.

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简介：ThemicrostructureandhardnessoftheHAZina800MPagradeultra-low-carbonmicroalloyedsteelwerestudied.Theresultsindicatethattheheataffectedzone(HAZ)oftheRPC(Relaxation-Precipitation-Controlling)steelpossessesacontinuousgradientstructure,andcanbeclassifiedintothreezones,i.e.CGHAZ(coarse-grainHAZ),FGHAZ(fine-grainHAZ)andICHAZ(intercriticaltemperatureHAZ).ThemicrostructuresintheHAZareallcomposedofbainite-likestructure.ThemicrostructareintheCGHAZmainlyconsistsoflath-likebainiteandgranularbainite.Theinfluencesofheatinputandt8/5onthehardnessintheHAZofRPCsteelarenotable.Withtheincreaseofheatinputandt8/5,thesofteningtendencyofHAZbecomesobvious.ThehardeningphenomenonthatnormallyoccursintheCGHAZdoesnottakeplacewiththissteelintherangeofexperimentalconditions.ThesofteningintheICHAZisboundtooccur.Henceappropriateweldingtechnologiesneedtobeselected.

简介：Anumericalmodelofthesteelcatenaryriser(SCR)isbuiltbasedontheslenderrodmodel.Theslenderrodmodel,whichdescribesthebehavioroftheslenderriserintermsofthecenterlineposition,cansolvethegeometricalnonlinearityeffectively.Inamarineenvironment,theSCRisunderthecombinedinternalflowandexternalloads,suchaswaveandcurrent.Ageneralanalysisconsidersonlytheinertialforceandthedragforcecausedbythewaveandcurrent.However,theinternalflowhasaneffectontheSCR;itisessentialtoexplorethedynamicresponseoftheSCRwiththeinternalflow.TheSCRalsosufferstheliftforceandthefluctuatingdragforcebecauseofthecurrent.Finiteelementmethodisutilizedtosolvethemotionequations.Theeffectsoftheinternalflow,waveandcurrentonthedynamicresponseoftheSCRareconsidered.TheresultsindicatethattheincreaseoftheinternalflowdensityleadstothedecreaseofthedisplacementoftheSCR,whiletheinternalflowvelocityhaslittleeffectontheSCR.ThedisplacementoftheSCRincreaseswiththeincreaseofthewaveheightandperiod.AndtheincreasingwaveperiodresultsinanincreaseinthevibrationperiodoftheSCR.ThecurrentvelocitychangesthedisplacementsoftheSCRinx-andz-directions.ThevibrationfrequencyoftheSCRiny-directionincreaseswiththeincreaseofthecurrentvelocity.

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简介：低碳Nb-Timicroalloyed钢受到热扭转在温度范围上测试8501100?楷桴吗？

简介：Fossil-fuelburninggreenhousegasinducedglobalwarminghasbeenrecognizedasglobalenvironmentalproblems,reduceandultimatelycontroltheenergyproductionintheuseofCO2emissions,globalenergyproductionwillbeamajorchallenge.Asahighlyintensivematerialsandenergy,ironandsteelenterprises,needtobeinvestedtoproduceonetonofsteelabouttwotonsofmaterialand0.7tofstandardcoalenergy,andwhileproducingtwotonsofCO2.Therefore,reducingCO2emissionsfromironandsteelindustryhasbecomethefocusoftheglobalsteelindustry.Thispaperdescribesanintegrateddomesticandinternationalmeasurestocontrolcarbondioxideemissionsresearchprogressandfuturetechnologytrends,withemphasisonthedomesticsteelindustryemissionsofcarbondioxidestatusoftechnologydevelopmentandindustrializationofimplementationoftheproposedonthisbasis,includingdryquenchingtechnology,gas,powergeneration,coalmoisturecontroltechnology,blastfurnaceinjectionplasticstechnology,theuseofcokingprocessfortreatingmunicipalwasteplasticstechnology,sinteringheatgeneration,lowpressuresaturatedsteamforpowergeneration,metallurgicalslagheatrecoverytechnology,cokeovengashydrogentechnologyandtheotherkeytechnologiesenergysavingtechnologies,includingthedevelopment,promotionandpopularizationofthesteelindustryinChinawillbetheCO2emissionreductiontechnologydirectionandfocus.Atthisstage,theChinesesteelindustrycanbeimprovedtheenergyefficiencyandrecyclingofwasteheatandenergy,reduceunitGDP,CO2emissions;butinthelongrun,shouldincreaseCO2captureandstorageontheinputoftechnologycanpossibleeffectivecontroloftheadverseeffectsofCO2emissions.

简介：Theeffectofcathodichydrogenchargingonthetensileandconstantloadpropertieswasdeterminedforanausteniticstainlesssteelweldmentcomprisinga304Lsteelinthesolutiontreatedconditionasabasemetalanda308Lfillersteelasaweldmetal.Partofthe304Lsolutiontreatedsteelwasseparatelygivenadditionalsensitizationtreatmenttosimulatethemicrostructurethatwoulddevelopintheheataffectedzone.Testswereperformedatroomtemperatureonnotchedroundbarspecimens.Hydrogenchargingresultedinapronouncedembrittlementofthetestedmaterials.Thiswasmanifestedmainlyasaconsiderablelossinthedluctilityoftensilespecimensandadecreaseinthetimetofailureandthresholdstressofconstantloadspecimens.The308Lweldmetalexhibitedthehighest,andthe304Lsolutiontreatedsteelthelowest,resistancetohydrogenembrittlement.Hydrogenembrittlementwasassociatedwiththeformationofstraininducedmartensiteaswellasatransitionfrombrittletoductilefracturemorphologyonwardsthecentreofthespecimens.

简介：Theearthquake-resistantpropertyofreinforcedconcretemembersdependsontheinteractionbetweenreinforcingbarsandsurroundingconcretethroughbondtoalargedegree.Inthispaperageneralsystemaimedatdealingwiththefailureanalysisofreinforcedconcretecolumnsstrengthenedwithcarbon-fiber-reinforcedplastic(CFRP)sheetsincludingbond-slipoftheanchoredreinforcingbarsatthefootofthecolumnsispresented.Itisbasedontheyielddesigntheorywithamixedmodelingofthestructure,accordingtowhichtheconcretematerialistreatedasaclassicaltwo-dimensionalcontinuum,whereasthelongitudinalreinforcingbarsareregardedasone-dimensionalrodsincludingbond-slipatthefootofthecolumns.InshearreinforcedzonesboththeshearCFRPsheetsandtransversereinforcingbarsareincorporatedintheanalysisthroughahomogenizationprocedureandtheyareonlyintension.Theapproachisthenimplementednumericallybymeansofthefinite-elementformulation.Thenumericalprocedureproducesaccurateestimatesfortheloading-carryingcapacityoftheshearmemberstakenasanillustrativeapplicationbycorrelationwiththeexperimentalresults,sotheproposedapproachisvalid.

简介：Reducingthechloridecontentinregeneratedironoxides(RIO)fromsteel-picklingacidwasteeconomicallytreatedbyRuthnerprocessisthemostcriticalissueforthedevelopmentofRIOasausefulrawmaterialresource.Inthispaper,theresultsofanewmethodforcharacterizationandmodificationofRIOproducedinMobarakehSteelComplexwerereported.

简介：Traditionally,austeniticstainlesssteels304and316havebeenemployedincoastalregionsasroofingmaterialsunfortunately,theyareexpensiveandnotfullyresistanttopittingcorrosionunderseverecoastalcorrosiveenvironment.AferriticstainlesssteelB445Rwasdeveloped.Comparedwithaustenitic316L,B445Ris①lesscostly;②uperiorcorrosionresistantwithminormaintenanceforlong-termservice;③insusceptibletothermaldistortionintheweldingseam.B445Rsheetshowsahigheryieldstrengthandlowertensilestrength,lowerelongationandlowerwork-hardeningthanaustenitic316L.Itcanbeeasilyfabricatedanddeformedjustlikeplaincarbonsteel.Afterbending180o,thereisnooccurrenceof'cracking'ornoticeable'orangepeel'.Theformabilityoftheweldingseamisalsosatisfactory.ThepittingpotentialofB445Ris650mV,largerthanthatof304and316L,asshowninFig.1.ThecorrosionrateofB445Rsubmergedin6%FeCl,solutionis0.3-0.56g/(m2?h-1),muchlowerthanthatof316L,asshowninFig.2.ThesuperiorpittingcorrosionresistanceofB445RcanbeascribedtosynergeticeffectofhigherCrandMo.Dull-finishedB445RsheetshavebeenemployedastheroofingmaterialsforGuangzhouAsianGamesArena,asshowninFig.3.About380tof1.0mmB445Rwithdullfinishwasusedforroofingpanels.About100tof0.8mmB445Rwithhairlineorfluororesinpaintfinishwasusedforsidewallpanels.Thecompositeroofbuild-up（fromuptobottom）includes:①shinglesofferriticstainlesssteelB445R;②Kalzip-typestandingseamofaustenitic304;③water-proofDFM;④structuralsteel;⑤75mmthickinsulation;⑥secondarypurlinof150mm×100mm×4.5mmofgalvaniziedQ235;⑦0.8mmthickprofiledeckofgalvaniziedQ235;⑧acousticinsulation.Theroofingshinglesorpanelswiththesamewidthbutdifferentlengthwereformedbybendingfoursidesandfixedtoa'L'shapereinforcingframesofstainlesssteelbyfasteners.The'L'frameswasconnectedtoribsofthestandingseambyacl

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简介：Zirconiagraphiterefractoryisusedasacore-nozzleinthethin-stripcastingofsteel.Post-mortemanalysisofusedrefractorywasperformedinanefforttoestablishthefailuremechanism.CorrosionbehaviorwasstudiedagainstmoltensteelwithMnO-SiO2basedliquidinclusions.CorrosionofthesematerialsinvolvesdissolutionandoxidationofgraphiteinthematrixfollowedbypenetrationofliquidslagleadingtodegradationofZrO2particles.Thermodynamicequilibriumcalculationswereperformedtostudythiscorrosionmechanism.