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

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

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：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：对5~#高炉后期操作与维护进行了总结和分析。通过精料和合理的操作制度、风口喂钛精线、炉缸加高压水、热负荷在线监测、加强铁口维护等措施,达到了高炉后期稳定、顺行、安全生产的目的。

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：介绍了5号高炉消音器的改造情况,及QP-TX气体排散特效消声器的结构和特点。

简介：5#高炉1997年6月中旬实施喷煤以来,经过几个月的摸索实践,到10月份平均煤比达到60.32kg/tFe,随着喷煤量逐步增加,高炉各项技术经济指标进步显著,喷煤取得了良好的经济效益。在现有客观条件下,该炉喷煤量可以达到80～100kg/tFe。

简介：大明国际宣布，间接全资附属公司江苏大明，向独立第三方宝钢不锈转让杭州万州金属制品公司5％的股权，涉资1117万元人民币。

简介：俄罗斯海关7月10日公布的数据显示，2015年前五个月，俄罗斯镍的累计出口镍量为83，400吨，同比下降约5％；镍的累计出口金额为11．339亿美元，同比下降近13．59％。

简介：介绍了炼铁厂5#炉原料转运系统除尘治理情况及治理技术，有效解决了原料转运过程中的无组织排放，为同类型粉尘治理提供了有益的参考。

简介：印度尼西亚将可能从今年5月份起禁止出口未经加工的原矿，早于2014年的最后期限。

简介：对5号高炉在入炉品位特别低的情况下如何采取一系列的有效措施进行了总结。认为在此情况下确保焦炭质量稳定,确保高炉顺行,维护好合理炉型,防止炉墙粘结,避免炉缸堆积,至关重要。

简介：5号高炉上料主皮带出现纵向撕裂,在无备用皮带的情况下,经过应急处理,维持了上料工作进行,配合炉内精心操作与调整,避免了高炉长期无计划休风,保证了炉况稳定顺行及炉况迅速恢复。

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