简介：Lightweightdesignisoneofthedevelopmenttrendsoftheautomobileindustry.AneffectivewaytoachievelightweightautobodiesistouseAHSS(advancedhighstrengthsteel)forthesafetycomponentsofautomobiles.ThisstudyhastakendoorsillreinforcementsmadeofmartensiteAHSSastheobject,andperformedresearchontheAHSSrollformingtechnologiesandprototypedevelopmentoftypicalasymmetricopencomponents.Bymeansoffiniteelementanalysis(FEA)andsimulation,studieshavebeencarriedoutonthespringbackandedgewavedefectsduringAHSSrollforming,andanoptimizedprocessdesignhasbeenachieved.Thegenerationmechanismsofverticalbows,horizontalcambers,twists,pre-punchedholedistortionandcutendflarehavebeenanalyzed,andsolutionstothesedefectshavebeengiven.Inaddition,tesingoftherollformingprocessforAHSShasbeenconductedandtypicalsampleswithrequireddimensionalaccuracyhavebeenmanufactured.Thisstudyhasprovidedtechnicalsupportforthelarge-scaleapplicationofAHSS.

简介：Toaddressthephenomenonofsparkingduringtheedgeinductionheatingprocessinhotstripmills,thispaperusesnumericalsimulationtosystematicallyinvestigatethekeyfactorsinfluencingsparkingandtheireffects.Thedistributionofinducedcurrentdensityinthesteelplateaboverollerconveyortableduringtheheatingprocessiscalculatedandcomparedunderdifferentconditions,includingtherelativepositionsofthesteelplateandinductioncoil,thewidthofthesteelplate,andchangesinload.Theresultsshowthatwhenanarrowsteelplateisheatedorthesteelplateshiftstothesideoftheinductioncoil,sparkingbetweenthesteelplateandrollerconveyorismorelikelytooccur.

简介：Thisarticleistrytoexplainoranalyzethekeytechnologiesofcontrollingthesurfacequalityoflowcarbonsteelascaststripthroughinvestigationofinterfaceheattransferbetweensolidifiedshellandliquidsteel.Theoneofthekeytechnologiesofcontrollingsurfacequalityoflowcarbonsteelascaststripisthroughthecastingrollsurfacetextureinordertoachievethehomogeneoussolidificationonthecastingroll.Anotheristhroughformingathinfilmonthecastingrollsurfaceinordertoachieveabalancebetweenrapidsolidificationandhomogeneoussolidification.Thisfilmformedbetweenthetwinrollandthemoltensteelcanbecontrolledbyadjustingthechemicalcompositionandinclusioninliquidsteelthroughcontrollingtheamountofall[O]andfree[O].

简介：Chinaisanimportantcountryinironandsteelindustry.Powerelectronicsconvertersarewidelyused.Forthecoldrollingmillsofhighspeed,AC-DC-ACconvertersshouldbeused.Inthepaper,thedesignandthecontrolsystemofthelargepowerthree-levelAC-DC-ACconverterwithIGCTsisinvestigated,andaback-to-backlargepowerthree-levelAC-DC-ACconverterwithIGCTshasbeengot.Withaseriesexperiments,theperformanceoftheconverterisexamined.Theexperimentresultindicatestheconverterreachesthedesignrequirementanditshowsexcellentperformance.Theconvertersystemhasbeenputintousesafely.ItisestimatedthattheAC-DC-ACconvertersystemwillbeusedinthedrivesystemsforrollingmillsinthenearfuture.

简介：头盆不称一般是指胎头与孕产妇骨盆大小不相称,又称为狭义的头盆不称,而因胎头位置异常所导致的头盆不适应,则称为广义的头盆不称。在头位难产中,头盆不称最为常见,若处理不当,易对母儿造成严重危害。1引起头盆不称的原因

简介：随着南钢高效率生产低成本智造精品钢理念的确立,提高利用系数已经成为4号高炉操作者亟待解决的首要问题。从2017年1月起,4号高炉在稳定炉况的基础上充分挖掘高炉产能,进行提高高炉利用系数的生产实践。高炉利用系数由2016年平均2.49t/m~3·d提高到2.90t/m~3·d左右。

简介：本文介绍了用ODBC技术实现iFIX组态软件与关系数据库通讯的原理和方法，并给出了在工程中的应用实例。通过实践表明该方法实现方便且有效。

简介：从分析50#热轧钢带氧化铁皮厚度及酸洗工艺入手,找出了热轧50#钢带酸洗不彻底的原因。通过增加破壳力度,采取单独堆冷工艺等措施可使问题得到解决。

简介：阐述现有技术条件下如何采用INTouch与关系数据库对炼铁厂高炉煤气系统进行开发,实现对高炉煤气参数的在线监测并形成报表分析,为值班工提供准确参数。

简介：近日，广东省工商局公布了对省内流通领域销售的不锈钢材及制品、建筑钢材的抽检结果，总合格率仅为六成。

简介：位于广西扶绥空港浙商工业园内的广西闪而不耀金属材料有限公司不锈钢深加工生产线项目，由浙江闪耀玻璃有限公司投资注册建立，占地一百多亩，总投资12840万元，包括用于生产高端不锈钢防盗门的不锈钢磨砂板制作，用于生产高品质不锈钢杯的不锈钢卷板制管制作，用于生产精美的不锈钢日用品的不锈钢开平拉丝制作等。该项目已于2011年6月16日开工建设，截至10月底，该项目已完成投资接近3000万元。