简介：目前，904L锻材、904L热轧卷板在太钢相继试制成功，这是太钢继成功开发出国内第一块904L中厚板以来超级奥氏体不锈钢“家族”再添的新成员。标志着太钢在拓宽不锈钢高端产品领域、在国家高、精、尖不锈钢品种的研究水平又有了新的突破。

简介：国际铁合金公司（IFM）面对疲软的需求和高库存量，计划减产铬铁产量，推延扩张计划。公司表示，铬铁需求不稳，公司将从12月1日减产铬铁量40％，从而IFM每月将产铬铁1．2万吨。

简介：通过观察分析40Mn带钢的表面裂纹,认为该缺陷可能是由钢坯裂纹引起的,并进一步分析了表面裂纹产生的过程。

简介：309Lisakindofausteniticstainlesssteel.Thispaperdiscusses309L,whichwassmeltedandrolledinalab.Itsmicrostructuralcharacteristicsinstatesofas-cast,hot-rolling,cold-rollingandsolidsolutionwereinvestigatedrespectivelybyopticalmicroscope(OM).Itisfoundthat309Liscomposedofausteniteandresidualδ-ferriteundertheseconditions,andtheδ-ferritecannotbeeliminatedeasilybyheat-treatment.Itshotplasticityanddeformationresistancewereinvestigatedinaseriesofheatsim...

简介：通过改进国家标准中40Cr圆钢的热处理工艺,并按照此工艺进行了试验,提出了适合鄂钢产的40CrA圆钢的热处理工艺,满足了国家标准对40CrA圆钢各项力学性能指标的要求。

简介：Inordertoimproveargonblowingefficiencyina40tonladle,numericalsimulationandwatersimulationexperimentsofthebottomargonflowwereperformed.Relationshipsamongtheladlemixingtime,slageyearea,differentblowingflowrates,anddifferentblowingpositions(0,0.56R,0.62R,0.67R)arediscussed.Resultsshowedthattheladlemixingtimedecreasedwhentheargonblowingbrickdistance(frombottomcenteroftheladle)increased,anddecreasedsignificantlywhentheblowingflowincreasedfrom70to130L/h.Whentheblowingflowincreasedandexceeded130L/h,thestirringeffecttendedtobestable,andtherewaslittleeffectontheladlemixingtime.Theslageyeareaincreasedastheargonbrickdistanceincreased,andwaslargerwhentheargonblowbrickwasneartheladlewall.Wallshearstresssignificantlyincreasedasthebrickdistanceincreasedandwasconcentratedattheslagwallneartheargonflowbrick;thisiscalledthemostseriouserosionwall.Theaveragewallshearincreasedexponentiallywithincreasingargonblowingbrickdistance.

简介：Twothermo-mechanicalcontrolledprocesses(TMCP)includingcontrolledrollingandacceleratedcoolingareproposedfortheproductionofheavygaugeSUS304Lausteniticstainlesssteelplateswithdifferentstrengthsandothercharacteristics.BasedontherecrystallizationmechanismandcarbideprecipitationbehaviorofSUS304Lausteniticstainlesssteel,TMCPprovidesapowerfulmeanstocontrolthemicrostructureandprecipitationofthehotrolledsteelplatebythecontrolledrollingandacceleratedcoolingprocess.Thedislocationdensityandgrainsizearethemainfactorsindeterminingthestrengthofthestainlesssteelplates.Therefore,itisnecessarytostrictlycontrolthehotrollingparameters,includingparameterssuchasthefinishhotrollingtemperatureintherecrystallizationtemperatureregionandthetotalreductioninthenon-recrystallizationregion.Furthermore,inordertoavoidcarbideprecipitationandguaranteetheintergranularcorrosionresistanceofTMCPSUS304Lausteniticstainlesssteel,acriticalcoolingrateafterrollingisdetermined.

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。

简介：316Lstainlesssteelcoatingswerepreparedbycoldgasdynamicspraying(CGDS)onacarbonsteel.Anewheaterofsprayedpowderswasaddedtothetraditionalfacility.Theresultsshowthatthecoatingqualityisobviouslyimproved,duetobetterinterfacebondingandreducedporosity.

简介：焦化厂的硫酸铵饱和器,常常由于检修焊接不当加之强腐蚀工艺介质剧烈腐蚀之下,造成焊接接头的腐蚀破坏,形成晶间腐蚀、裂纹、穿孔等焊接接头缺陷和危害。因而,本文从316L不锈钢的焊接性入手,分析其晶间腐蚀,焊接热裂纹,应力腐蚀开裂,接头的σ相脆化等该材质的焊接特点,并详述了其防止的具体措施。结合实际有针对性的阐述了其该母材的焊接工艺及要点,有效的降低316L不锈钢的晶间腐蚀及其他焊接缺陷,提高了其焊接性。

简介：通过409L不锈钢板材表面线鳞缺陷检验、工艺状态及TiN形成热力学分析，认为导致409L板材表面线鳞缺陷原因主要是钛的夹杂物。钛的夹杂物来源于炼钢生产过程大量TiN的析出。解决这一问题的关键在于控制钢中的氮含量，在现有工艺装备条件下，重点是减少炼钢过程的增氮量。根据这一思路，制定相应措施，有效抑制了线鳞缺陷的批量发生。

简介：中国台湾中钢公司决定自4月中旬起将第三号高炉提前停产维修，最早9月初方能复产，此期间预计产量将减少约40％～45％。

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：韩国浦项钢铁公司下属的设备专业制造企业POSCOPlantec于2014年12月29日称，全球首次采用904L超级奥氏体不锈钢中厚板制造出用于生产液化石油气的罐体，并已向三星重工发货。

简介：FSWandTIGwereconductedon316Lstainlesssteel.Variationduringmicrostructureandpropertiesinjointsobtainedbydifferentweldingmethodswasstudied.TheresultsshowthattheeffectofseveremechanicalstirringandintenseplasticdeformationcreatafinerecrystallizedgrainintheweldingjointduringFSW.AsforTIG,thetemperatureofweldingjointexceedsthemeltingpointofweldedmaterialitself.Theentireweldingprocessbelongstothesolidificationofasmallmoltenpool;andthemicrostructureofthejointtakesonatypicalcastingstructure.Whentheweldingparameterswereselectedappropriately,theaverageultimatetensilestrengthofFSWjointscanreach493MPa,whichis83.6%ofbasemetal;theaverageelongationis52.1%ofbasemetal.TheaverageultimatetensilestrengthofTIGjointsis475MPa,whichis80.5%ofbasemetal;theaverageelongationis40.8%ofbasemetal.ThetensiletestofFSWjointsissuperiortotheTIGjoints.ThemicrohardnessofFSWjointcomparedtobasemetalandTIGjointhavingasignificantimprovement,whicharel95.5HV,159.7HVand160.7HV,respectively;grainrefinementstrengtheningplaysanimportantroleinenhancingthemicrohardness.TheelectrochemicalcorrosiontestsshowthatthejointofFSW316Lausteniticstainlesssteelhasagoodcorrosionresistance.

简介：采用100tUHP电炉短流程生产L245NCS，通过实施精料方针、规范脱氧工艺、优化吹氩处理工艺、选择最佳二冷区配水模型、采取钢水低过热度浇注浇注、控制拉速、控制轧制温度等，产品能够满足市场需求。

简介：TheFe-Ti-Nmateralloywaspreparedthroughthein-situreactionofnitrogengaswiththeFe-Timelt.ScanningelectronmicroscoperesultsshowthattheparticlesuniformlydistributedintheironmatrixwereTiN.ThedeliberatelypreparedFe-Ti-Nmasteralloywasemployedforthe409Lferriticstainlesssteelinanattempttorefinetheas-castsolidificationstructure.ItwasfoundthattheeffectivenessofFe-Ti-Nmasteralloyonrefiningoftheas-cast409Lferriticstainlesssteelwasaffectedbyadditionlevel,holdingtimeandmeltstemperature.Itwasfoundthattheaverageequiaxedgrainsizedecreasedfrom1503μmto303μm,theproportionofequiaxedgrainzoneincreasedfrom14%to100%withincreasingtheFe-Ti-Nmasteralloyadditionlevelto2.5%.Theproportionofequiaxedgraindecreasedfrom85%to4%asthesolidificationtemperatureincreasedfrom1803Kto1883K.Whentheholdingtimereachedto8min,thesolidificationstructuresof409Lferriticstainlesssteelshowextremepointsintheproportionofequiaxedgrain.Itisclearthatthegrainrefiningefficiencygraduallyfadeawaywiththeincreasingoftheholdingtimeattheverybeginning.However,whentheholdingtimecontinuestoincreaseandexceedstheextremepoint,thegrainrefiningefficiencyoftheFe-Ti-Nmasteralloyrecoveredtoacertaindegree.Theexperimentalresultsmentionedabovehavebeenanalyzedintermsofthermodynamics.Underappropriateconditions,theFe-Ti-Nmasteralloyusedforgrainrefinementofthesolidificationstructureof409Lferriticstainlesssteelmayhavegoodprospectsforindustrialapplications.

简介：太钢方面表示将继续稳定3月份现货市场资源投放量，本月对于代理商协议供应量继续削减40％。钢厂方面称，目前市场供应与需求尚未完全协调对接，因此有必要保持对现货市场资源供应的平稳性。

简介：圣保罗消息：阿赛洛巴西公司7月29日表示，公司在未来5年内在巴西的投资额将高达40亿美元，有望成为拉丁美洲最大的钢铁生产商。

简介：12月2日，美国上市希腊LNG船公司GasLog与其联营公司GasLogPartnersLP（GLOP）联合发表了所谓的“40：17”蓝图。根据相关计划，两家公司的LNG船队规模计划从目前的31艘到扩张至2017年的40艘。据了解，GasLog公司目前拥有包括10艘自有船、10艘在建船以及6艘该公司担任技术管理的船，总计26艘LNG船，GLOP公司拥有5艘LNG船。另外，该公司表示，LNG运输市场正处于增长趋势中，Clarksons分析，除了眼下在建船舶外，在全球范围内，到2020年还需要187艘LNG船。