简介：通过对铜精矿样品的制备、标样的化学定值、仪器条件的选择、工作曲线的制作、准确度和精密度的考核等实验，建立x射线荧光光谱仪测定铜精矿中CaO、MgO、Pb、Zn的方法。同化学分析方法比对数据相吻合，满足生产配料对铜精矿中CaO、MgO、Pb、Zn的控制，促进闪速炉的生产稳定。

简介：采用压片法制样,用X射线荧光光谱仪测定转炉渣中主要化学成分,经转炉渣国家标准样品验证,分析结果的准确性和精密性均符合要求。

简介：研究了以氯化亚锡作还原剂，用原子荧光光谱仪测定铜精矿中的微量汞。结果表明，原子荧光法可测定铜精矿中0．00002％-0．00012％的汞，方法线性范围在0～6μg/L，r=0．9995，检出限为0．0042μg/L，样品加标回收率在94％-98％。方法简便，准确，结果令人满意。

简介：介绍ER70S-6X焊丝钢的生产情况。通过化学成分及残余元素控制、精炼脱氧制度优化、连铸保护浇注和铸温铸速的稳定控制等工艺措施的实施，使EK70S－6X焊丝钢的产品质量和综合性能得到了稳定提升。

简介：MeltspinningtechnologywasusedtopreparetheMg2Ni-type(Mg24Ni10Cu2)100–xNdx(x=0,5,10,15,20)alloysinordertoobtainananocrystallineandamorphousstructure.TheeffectsofNdcontentandspinningrateonthestructuresandelectrochemicalhydrogenstorageperformancesofthealloyswereinvestigated.ThestructurecharacterizationsofX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM)andscanningelectronmicroscopy(SEM)linkedwithenergydispersivespectroscopy(EDS)revealedthattheas-spunNd-freealloydisplayedanentirenanocrystallinestructure,whereastheas-spunNd-addedalloysheldananocrystallineandamorphousstructureandthedegreeofamorphizationvisiblyincreasedwiththerisingofNdcontentandspinningrate,suggestingthattheadditionofNdfacilitatedtheglassformingoftheMg2Ni-typealloy.TheelectrochemicalmeasurementsindicatedthattheadditionofNdandmeltspinningimprovedtheelectrochemicalhydrogenstorageperformancesofthealloyssignificantly.Thedischargecapacitiesoftheas-castandspunalloysexhibitedmaximumvalueswhenNdcontentwasx=10,whichwere86.4,200.5,266.3,402.5and452.8mAh/gcorrespondingtothespinningrateof0(As-castwasdefinedasthespinningrateof0m/s),10,20,30and40m/s,respectively.Thecyclestability(S20,thecapacitymaintainrateat20thcycle)oftheas-castalloyalwaysrosewiththeincreasingofNdcontent,andthoseoftheas-spunalloysexhibitedthemaximumvaluesforNdcontentx=10,whichwere77.9%,83.4%89.2%and89.7%,correspondingtothespinningrateof10,20,30and40m/s,respectively.

简介：本文通过对分析条件的优化，实现了原子荧光光谱法测定钢中0．001％-0．100％含量范围的砷。在最佳工作条件下，实现了对低合金钢中0．001％-0．100％的砷准确测定，RSD为1．63％（n=6），加标回收率为96％-102％。

简介：BaoshanIron&SteelCo.,Ltd.,(referredtoasBaosteel)inChinafirstsucceededindevelopingtheU-ing-O-ing-Expanding(UOE)longitudinalsubmergedarcweldedpipes(SAWLs)offshorelinepipeofamaximumthickness/outsidediameter(T/D)0.042in2011.DescribedinthispaperistheresearchanddevelopmentoftheX70UOESAWLpipesbythecompany.TheresultshowsthatthesaidX70linepipehasbeenincompliancewithrelevantrequirementsasspecifiedinSpecificationsDNV-OS-F101,andhasbeensuccessfullyusedintheSouthChinaSeadeepwatergaspipelineproject.

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