简介：ItisfundamentallyimportanttounderstandtheinfluenceofstrainonthedensityofdeformationtwinsinTWIPsteelbecausetwinningisitsdominantdeformationmechanism.ThedeformationbehaviorofaFe-30Mn-4Si-3Al-0.097CsteelhasbeeninvestigatedbyX-raydiffraction(XRD),electronbackscatterdiffraction(EBSD)andtransmissionelectronmicroscopy(TEM)techniques.Samplewithanaveragegrainsizeof10μmwasdeformedincold-rollingwithareductionof10%,20%,30%,40%,50%,60%and70%,respectively.Themechanicalpropertiesofthecold-rolledsampleswerefurtherinvestigatedbytensiletests.Theyieldstrength(σy)andultimate-tensile-strength(σUTS)oftheas-preparedsampleis480MPaand850MPa,respectively.However,undercoldrollingdeformation,thetensilestrengthobviouslyincreaseswithanincreaseinrollingreduction.Thesamplewitharollingreductionof10%exhibitsσyof610MPaandσUTSof-1000MPa.Theyieldstrengthandtensilestrengtharefurtherenhancedupto1320MPaand1378MPaforthespecimenwitharollingreductionof70%,regardlessofthepoorductilityof6.7%.ThedeformationmicrostructureswerestudiedbyEBSDandTEMobservations.Itisfoundthat,withincreasingrollingreduction,theaveragedistancebetweendeformationtwinsdecreasesgraduallywhilethedensityofdeformationtwins(thelengthoftwinboundaryinunitarea)exhibitamaximumvalueat40%cold-rolling+tension.Carefullystatisticsanalysisrevealsgrainorientationiscloselyrelatedtothedeformationtwinsandtheunderlyingmechanismgoverningthetwinningisdiscussed.

简介：本文针对φ6.5mmH08A盘条"较硬,拉不动"的问题,利用金相显微技术对非金属夹杂物和组织进行了分析。分析结果显示:铁素体晶界游离出三次渗碳体以及铁素体晶粒细化是盘条整体出现"拉不动"现象的症结所在。并从金相学角度论述了组织状态对H08A拉丝成型性的影响。另外,试样中的硫化物类夹杂有成簇出现、分布密集的特点以及个别硅酸盐类夹杂尺寸大且局部脆性的表现,也对H08A拉丝成型性能起到了负面的影响。

简介：对KDON-35000/40600型制氧机组经济运行作了阐述,提高有效能的利用率,降低氧气放散率,从而实现降本增效。

简介：ThisstudyresearchestheeffectsoftherefiningtreatmentonthemicrostructureandthemechanicalpropertiesofH13mandrelsteelandcomparestheseeffectswiththoseoftheconventionaltreatment.Theresultsindicatethatbothcarbideparticlesandgrainswererefined,carbideparticleswereuniformlydistributedbytherefiningtreatment,andtherefore,thestrengthandtoughnessofH13mandrelsteelwereimproved.Rapidcoolingafterthesolutiontreatmentmayinhibitintra-granularprecipitationofcarbideparticles,whichisfavorabletoenhancingtoughness.Consequently,high-performanceH13mandrelsteelcanbeproducedbyproperrefiningtreatment.

简介：采用EAF以80%铁水+20%优质废钢为原料不送电冶炼、LF造高碱度CaO-SiO2-Al2O3三元渣系精炼、连铸保护浇注等生产工艺,实现了超洁净焊接用钢H08AT的生产。

简介：介绍了南钢采用电炉-LF精炼炉-VD真空炉-320mm×480mm连铸生产线开发8622H钢的关键生产工艺技术。分析表明开发生产的8622H,成分均匀、纯净度高、淬透性带宽可稳定控制在4HRC以内。

简介：Thedifferencesofreductionbehaviorsbetweenironorelumpandpelletswerestudiedbyconductinglowtemperaturereductiondegradation,staticloadreductionanddroplettests.Thesetestssimulatedtheconditionsofreductiontemperatureandhydrogen-containinggasinCOREX.Duetoitsdensestructureandlowporositycomparedwithpellets,lumporepossessespoorreductiondegradationindex(RDI)andslowerreductionrateinearlyandmediumreactionstages,showingsignsoflowerstrength,lowersofteningandmeltingtemperatures,aswellasawidermeltingzoneandhigherΔP.Thatprovidessomebasistoexplainthephenomenaofdifferentialpressurerise,metallizationdeclineandmorestickingaftertheusageoflumporeinCOREXplant.

简介：鄂钢140t/h干熄焦秉承了国产化干熄焦技术优点,同时具有多项技术创新,并针对实际对工艺和设备进行了技术改进和完善。

简介：Opticalmicroscope,stereomicroscope,scanningelectronicmicroscope(SEM)andmechanicalpropertytestingwereusedtoresearchtheeffectsofdifferentquenchingtemperaturesonthemicrostructureandmechanicalpropertiesoftheH13mandrelsteel.Theresultsindicatethatfollowinganincreaseinthequenching,thedegreeofalloyingisenhancedduetothecarbidesdissolvinggraduallyinaustenite,whichimprovesthehardenabilityofthespecimens,aswellastheirroomandhigh-temperaturestrength.Atthesametime,thefracturetoughnessincreasesduetotheincrementofthemartensitenumberandtheinterparticledistanceofthecarbides.However,extremelycoarsegrainandmartensitecandecreasetheimpacttoughness.Optimalperformancecanbeobtainedafterquenchingat1060℃anddoubletemperingat620℃.Consequently,theservicelifeoftheH13mandrelsteelisextendedsignificantly.

简介：通过对耐大气腐蚀钢SPA—H的成分设计、冶炼过程及轧制过程的控制，生产出尺寸公差、表面质量及各项性能都符合JISG3125—1987标准要求的SPA—H钢带。

简介：为充分利用"杂矿"冶炼的铁水中的合金元素,通过对某钢种残余元素含量进行分析,研究采取适当的配矿及冶炼工艺,减少贵重合金消耗,从而降低耐候钢带SPA-H的制造成本。

简介：ThegrainrefiningmechanismofC-Mnsteelsheetoncompactstripproduction(CSP)linewasinvestigatedinthisstudy.Thegrainwasabout100μmafterF1passanddecreasedallthewayoftherollingprocess(F2-F6)to15μm.Repeatedphasetransformationexperimentwasconductedtothesteelforgrainrefinement.Thephasetransformationat860℃and920℃canrefinethegrainsizeto7.5μm.

简介：针对4#高炉炉缸堆积事故，分析产生的原因，确定处理方案，阐述处理过程。探讨处理方法和预防措施。

简介：4#高炉自2004年10月份开炉以来经过几个月的操作实践和摸索,在逐步调整的过程中,实现了高压操作技术,并确立了与之配套的各种工艺操作参数,在创造良好的技术经济指标的同时,成功地实现了高产低耗的目标。

简介：4#高炉2014年5月份以来不断尝试探索新的布料模式,并最终实现由中心加焦操作到＂平台＋漏斗＂模式的转变。分析对比炉内燃料消耗、顺行情况和中心加焦时期操作炉型的变化以及高炉抗干扰能力的改善。

简介：介绍炼铁厂4^#高炉达产前高炉状况：炉况不顺，冶强上不去。经过分析，进风面积偏小，气流偏行是制约因素。通过采取扩大风口面积，加强槽下筛分等一系列措施，确保顺利达产。

简介：本文介绍了4~#连铸机生产工艺优化的具体措施。采用新技术,实行工艺优化后,铸坯实物质量显著改善,为转炉品种研制和开发创造了条件。

简介：从马钢一钢轧总厂成功采用欧标自主开发出了H340LAD铌微合金化钢合格热轧钢卷451t。

简介：对3~#、4~#高炉原喷煤系统存在的问题进行了分析,综述了喷煤系统经过技术改造后产生的效果。

简介：通过加入锰矿来处理炉缸堆积，清除炉墙粘结，达到高炉稳定、顺行的目的。