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：Dofasco公司的PCA系统已成功应用于在线故障检测，而且在检测不正常浇铸方面，PCA监控系统可提供对报警的解释，有助于操作员加深对工艺的理解。

简介：1#高炉停炉进行小中修后,各项指标有明显改善。其原因有:操作炉型比小中修前合理,风压和风温大幅度提高,使用了效率更高的棒条筛,炉前系统采用了液压泥炮和液压堵渣机。

简介：焦化分厂建立的小焦炉在寻找新煤源、降低成本、改善焦炭质量方面发挥了较大作用，本文介绍了利用小焦炉进行单种煤质分析和配合煤试验的过程。

简介：从原料结构，操作制度和工艺设备等方面分析大烧结机烧结矿质量变差的原因，并提出相应的措施和对策。

简介：根据烧结矿强度现状,从原料结构、工艺因素、流程等方面进行分析,并提出改进措施,以减少5～10mm入炉烧结矿粒级,改善粒度组成。

简介：介绍了电炉厂在废钢场地封闭管理,丰富炉料品种和优化炉料结构等方面所做的工作,证实了精料方针能显著改善技经指标。

简介：烧结料中进口粉矿配比增加、品位提高和SiO2含量降低，致使成品矿强度降低和小粒级(＜lOmm)增多，提高碱度、改进加水方式、强化制粒、低水低碳厚料层烧结可明显改善烧结矿强度和粒度组成。

简介：文中分析变频器调速系统在低速时存在的一些问题,并提出相应的改善措施。