简介：为满足用户对轴承钢线材碳化物均匀性的较高要求，线带厂高线生产线通过挑选坯料，控制加热温度、加热时间和出钢温度，控制轧制温度和轧制形变量以及盘条在风冷线上的冷却速率，使得碳化物液析控制在0．5级以内，碳化物网状和带状控制在1．5级以内，提升了产品的内在质量。

简介：以中速磨液压传动系统为例,对液压传动的工作原理、组成结构、运行方式以及维护保养等多个方面进行了分析。

简介：La15Fe77B8hydrogenstoragealloyswerepreparedusingavacuuminduction-quenchingfurnace.TheresultsofX-raydiffraction(XRD)andscanningelectronmicroscopy(SEM)suggestedthatLa15–xSmxFe2Ni76Mn5B2(x=0,2,4,6)alloyshadmultiphasestructureincludingthemainLaNi5phase,La3Ni13B2phaseand(Fe,Ni)phase.WiththeincreasingsubstitutionofSmforLa,themainphasestructureofalloysdidnotchange,whiletheunitcellvolumesdecreased,thecyclestabilitywasimprovedandthemaximumdischargecapacitydecreased,butthelowtemperaturemaximumdischargecapacityofthesamesubstitutionalloywasgraduallyapproachingthemaximumdischargecapacityatroomtemperature,whichshowedthatLa15Fe77B8hydrogenstoragealloysofthepartialsubstitutionofSmforLahadbetterlow-temperaturedischargeability(LTD).Forthesamesubstitutionalloys,self-dischargecharacteristicsandcyclestabilityatlowtemperaturewerebetterthanthatatroomtemperature.Furthermore,thehigh-ratedischargeability(HRD)andtheexchangecurrentdensityI0firstincreasedandthendecreasedwiththeincreasingofSmcontent,whereasthehydrogendiffusioncoefficientDinalloybulkdecreasedgradually,whichindicatedthatappropriatesubstitutionofSmforLaimprovedtheelectrochemicalkineticspropertiesofthealloys.TheHRDwasmainlydominatedbythecharge-transferrateonthealloysurface.

简介：15%Ag-addedcubicperovskitesSr0.9La0.1TiO3andRuddlesden-Popper(RP)phasesSr2.7La0.3Ti2O7werefabricatedviahydrothermalsynthesis,coldpressingandhigh-temperaturesintering.Thestructureandthermoelectricpropertieswerealsoinvestigatedforallsamples.TheresultsindicatedthatAgprecipitatedasasecondphase.AgadditionmadeelectricalconductivityandabsoluteSeebeckcoefficientenhanced,asaresult,theZTvalueswereenhancedbothfortwoseries.Comparedwithcubicperovskite,RPphasewassubjectedtosmallerimpactbyAgaddition.ThereasonsforenhancingZTvalueandthedifferentimpactfortwoseriesbyAgadditionwerealsodiscussed.