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：文章介绍了液压缸的故障现象，深入分析了产生故障的原因以及排除液压缸故障的种种措施。

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简介：酒钢集团宏兴股份公司碳钢薄板厂转炉公用系统中运用ControlNet光纤中继器来扩展远程I/O,进行设备控制。通过该中继系统引起的一起设备故障发现模块手册上关于故障描述及处理建议的相关信息较少,未能起到较强的指导意义,因此搭建实验平台进行测试,以便找寻更多用于故障恢复的相关信息。

简介：做好炼钢LF炉液压系统的常见故障判断及维护工作是保障LF炉设备正常运行、保证生产作业率的关键,本文论述如何做好LF炉常见故障的分析判断及维护,并简要介绍液压设备的点检管理要点。

简介：答：是否发生奥氏体再结晶行为可以由试验后的应力一应变曲线判断，当屈服后应力一应变曲线出现一峰值或者出现抖动现象，说明发生了奥氏体再结晶行为，这是因为奥氏体再结晶会软化材料，导致应力降低，而变形会因加工硬化导致材料的应力上升。

简介：高炉冷却系统事故，特别是疑难事故的检查是一项细致而又复杂的工作。由于高炉冷却设备多，各种冷却壁、风、渣口多套，真正做到及时、准确的判断要依靠工作经验的积累，多种多样的检查手段和方法。本人在几十年工作经验中摸索积累总结了一套基本方法，概括起来六个字：看、摸、调、测、联、压。

简介：以螺纹钢HRB400内控样为例,对光谱分析用内控样品的制作要求、均匀性检验与判断,以及定值与数据处理等方面做了介绍。

简介：介绍了经典符合性判定和测量不确定理论,结合实例指出经典符合性判定存在"风险共担"的问题,由此提出在检测结果符合性判断中应引入不确定度理论。