简介：连铸1Cr18Ni9Ti由于TiN夹杂导致扒皮率高,工艺难以控制。通过几年的技术攻关,严格控制AOD精炼参数,采用吹氩喂丝新技术以及连铸无氧化保护浇注、加厚铸坯等措施,有效地解决了连铸坯表面质量问题,产品性能良好,为太钢连铸优势的发挥奠定了基础。

简介：Abstract:TheeffectofTiandNbontherecrystallizationandtherecrystallizedgrainsizeofthehot-rolledplatesandcold-rolledsheetsofultralowcarbonandnitrogen(ULCN)Cr18ferriticstainlesssteel(FSS)isinvestigated.Theresultsshowthattherecrystallizationofhot-rolledplatesandcold-rolledsheetswith0.29%Nbisdelayed,andtherecrystallizedgrainsaresignificantlyrefined.

简介：阐述了影响1Cr18Ni9Ti管坯热穿孔工艺性能的因素,剖析了不锈钢荒管产生内折和纵裂的原因,提出了防止上述缺陷的措施。

简介：介绍不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ的冶炼和加工工艺并作了分析探讨。检验分析了该钢的化学成份，显微组织和夹杂物等，结果表明，太钢生产的不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ完全能够达到技术条件的要求，说明现行的生产工艺是可行的。

简介：太原钢铁集团公司和成都无缝钢管公司双方利用各自装备优势，通过合作解决了生产大口径不锈钢冷拔无缝钢管的关键－大型不锈钢管坯和热穿孔。详细介绍了Φ１８０×１５冷拔不锈钢无缝管的管坯制造、热穿孔、冷拔（扩）、热处理等生产工艺和产品的良好市场前景。

简介：Cr的Nanopowder:Cr的GGG和nanopowder，Nd:有从0.1at.%到1.5at.%的Cr3+的不同集中的GGG被大音阶的第五音胶化方法用醋酸和乙烯乙二醇综合。热gravimetric分析和微分扫描热量测定(TGA-DSC)，X光检查衍射(XRD)和光致发光光谱学被用来描绘粉末。当在1000点对待时，雏晶尺寸是大约58nm?????????????????猯灵?匠?猼'T资???猼灵?????????猯'T??猼灵????￣?????猯'T????猯灵??猼'T?????吗????????????????‵渠????????浮？？

简介：Precipitationstrengtheningaswellassolutionstrengtheningiskeymechanismforheatresistantsteels.Itisveryimportanttocharacterizetheprecipitatesin9%Crferriteheatresistantsteels,especiallytoshowthenanometer-sizedparticles.Bytransmissionelectronicmicroscopeattachedwithanenergydispersivespectrometeraswellasopticalmicroscope,scanningelectronicmicroscope,themicrostructureandchemicalcompositionofprecipitatesina9%Crheatresistantsteelafterdifferentheattreatmentswereinvestigated.ItwasfoundthatthemicrostructureofnormalizedsamplewasmartensitewithfineNbCandFe3C.Themicrostructureoftemperedsampleistemperedmartensite,andtheremainlyweretwotypesofprecipitates,M23C6withthesizerangeof50-300nmandMXwiththesizeof10-100nm.SuperfineM23C6precipitatedpreferablyonpriorausteniticgrainboundariesandmartensiticlathboundaries,whilenanometer-sizedMXprecipitatesweredistributedrandomly.Aftershort-termcreep,Lavesphaseformedalonggrainboundariesofthe9%Crsteel,andM23C6andMXprecipitateswerefoundtobecomecoarser.Moreinformationaboutprecipitatesinthe9%Crsteelhadbeenexhibitedbyatomicforcemicroscopy.Thereby,distribution,sizeandshapeoftheprecipitatesaswellastheircompositionsandstructureswererevealed.

简介：以便改进金属压路机的表演，Mo+Y2O3合金粉末由CO2激光为激光表面alloying处理在40Cr钢压路机底层的表面上一致地习惯于上衣，结果证明许多好后果在增加稀土元素氧化物Y2O3以后被获得。合金层的水晶谷物显著地被精制。水晶谷物的边界被加强。微观结构的一致性和密度被增加。坚硬和合金层的穿的抵抗更加被改进。合金层的原子价电子结构分析被固体和分子(EET)的实验电子理论做。计算结果证明Y应该在第一个阶段被混合，Fe应该在第十八个混合乐队。说明的分析结果稳固的答案的电子理论在alloying上显示出加强的效果层，它提高了契约并且证实了试验性的结果。

简介：通过化学成分检验、金相分析、及对连铸工序进行调查,分析了转炉冶炼40Cr热轧圆钢表面裂纹的产生原因。结果表明,连铸拉速不稳定是造成裂纹的主要原因。并跟踪分析了一个浇次连铸拉速的控制情况。

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简介：Ni-Cr-Mo合金经冷压成型后于真空中以不同温度进行烧结.通过测定其相对密度、线收缩率、拉伸强度和硬度,研究烧结温度对合金性能的影响.研究结果表明:当烧结温度不超过1330℃时,合金的相对密度、收缩率、拉伸强度和硬度随烧结温度的上升而缓慢增加;当温度上升到1360℃时,合金的这些性能指标急剧增大;当温度上升到1390℃时,烧结后的合金试样外形发生严重变形.

简介：Inordertoutilizetheadvantageofoxidesinstainlesssteel,theformationoftitaniumnitride(TiN)andoxide(TixOy)inthe17CrsteelwasinvestigatedbythecalculationofthefreeenergyofreactionandthermodynamiccalculationwithThermo-calcsoftware.Theresultindicatesthatthecompetitivereactionbetweenthedissolved[O]andthedissolved[N]withthedissolved[Ti]inmoltensteelresultsindifferentprecipitationsequencesofTiNandTixOy.TheprimaryprecipitationofTiNrequiresalow[O]andtheprimaryprecipitationofTixOyrequiresalow[N].Theincreaseof[Ti]causesahigherprecipitationtemperatureofTiNandTixOyinbothTi-NandTi-Oalloysystems.Equilibriumrelationsof[Ti]vs[N]and[Ti]vs[O]showthatthesolubilityproductsfallwiththedecreaseofthetemperature,andthentheprecipitationoftheinclusionsbecomeseasier.IntheTi-Oalloysystem,ahigh[O]andalow[Ti]arefavorabletotheprecipitationofTi3O5,andahigh[Ti]contentandalow[O]favorabletotheTi2O3precipitation.

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简介：针对40Cr圆钢个别炉号冲击功不合问题,通过分析钢种成分、金相组织,并对生产过程进行调查,得出A类夹杂物是造成圆钢冲击功不合的主要原因。通过采取有效措施,40Cr圆钢冲击功不合问题得到控制。

简介：Martensiticstainlesssteelcontaining12%-18%Crhavehighhardnessduetohighcarboncontent.Thesesteelsarecommonutilizedinquenchingandtemperingprocessesforknifeandcutlerysteel.Thepropertiesobtainedinthesematerialsaresignificantlyinfluencedbymatrixcompositionafterheattreatment,especiallyasCrandCcontent.Comprehensiveconsideredthehardnessandcorrosionresistance,anewtypemartensiticstainlesssteel6Cr15MoVhasbeendeveloped.Thisstudyemphaticresearchestheeffectofheattreatmentprocessesonmicrostructureandmechanicalpropertiesof6Cr15MoVmartensiticstainlesssteel.Thermo-Calcsoftwarehasbeencarriedouttothermodynamiccalculation;opticalmicroscope（OM）,scanningelectronicmicroscope（SEM）andtransmissionelectronmicroscope（TEM）havebeencarriedouttomicrostructureobservation;hardnessandimpacttoughnesstesthavebeencarriedouttoevaluatethemechanicalproperties.Resultsshowthattheequilibriumcarbidein6Cr15MoVsteelisM23,C6carbide,andfinelydistributedofM23C6carbidescanbeobservedonannealedmicrostructureof6Cr15MoVstainlesssteel.6Cr15MoVmartensiticstainlesssteelhasawiderquenchingtemperaturerange,thehardnessvalueofsteel6Cr15MoVcanreachto60.8-61.6HRCwhenquenchedat1060-1100℃.Finelydistributedcarbideswillexistinquenchedmicrostructure,andeffectivelyinhabitthegrowthofaustenitegrain.Withtheincreasingofquenchingtemperature,thevolumefractionofundissolvedcarbideswilldecrease.Theexcellentcomprehensivemechanicalpropertiescanbeobtainedbyquenchedat1060-1100℃withtemperedat100-150℃,anditismainlyduetothehighcarbonmartensiteandfinegrainsize.Atthesetemperatureranges,thehardnesswillretainabout59.2-61.6HRCandtheCharpyU-notchimpacttoughnesswillretainabout17.3-20J.Themorphologyofimpactfracturesurfaceoftestedsteelissmalldimpleswithasmallamountofcleavageplanes.Theareaofcleavageplanesincreaseswiththeincreas

简介：探讨了在大生产条件下4Cr5MoSiV1钢的脱碳层测定原则。结果表明,金相法测定结果较准确且操作简便

简介：本文主要介绍炉后型KTO—Cr定氧仪的工作原理及其应用，井简述了运用定氧技术来指导炼钢操作和提高钢水质量。

简介：Inthelastthreedecadesnewstrongermodified9%Crsteelshavebeenintroducedinnewpowerplantswithsteamparametersupto300bar(1bar=10~5Pa)and600℃.Inordertofurtherincreasethesteamparametersofsteelbasedpowerplantsuptoatargetvalueof650℃/325baritisnecessarytodoublethecreepstrengthcomparedwithtodaysstrongest9%Crsteels,andatthesametimetheresistanceagainststeamoxidationmustbeimprovedbyadding12%Crtothesteel.However,sofarallattemptstomakestronger12%Crsteelshavebeenunsuccessfulbecausethehighchromiumcontentintroducedseveremicrostructureinstabilitiesinthetestedsteels.Recently,itwasfoundthatthemicrostructureinstabilitiesin11%-12%CrsteelscanbeexplainedbytheprecipitationofcoarseCr(V,Nb)NZ-phases,whichdissolvefine(V,Nb)Nnitrides.AnewpossibilitytousetheZ-phaseforstrengtheningof12%Crsteelshasbeenidentified,andthedevelopmentofstablestrongmartensitic12%Crsteelsbasedonthisconceptisexpectedtoallowtheconstructionof325bar/650℃steampowerplantsallbasedonsteel.

简介：主要采用金相及SEM分析方法,对20Cr2Ni4A锻圆表面裂纹性质及产生原因进行了分析,结果表明锻圆表面裂纹是由于原材料存在表面夹杂/渣引起的。

简介：Thisstudyinvestigatesthecorrosionpropertiesof0Cr11Tiand0Cr11NbTiferriticstainlesssteels(FSS)forautomotiveexhaustsystems.Theresultsindicatethatthebasemetalandweldseamof0Cr11NbTisteelexhibitbetterintergranularandcondensatecorrosionresistantpropertiesbecausecarbonandnitrogenarestabilizedbyNbandTi,andtheprecipitationofCrcarbideisretardedingrainboundaries.