简介：采用金相显微镜、扫描电子显微镜对82B盘条钢拉拔断裂试样进行了分析。结果表明,钢中较多的非金属夹杂物影响材料连续性,是盘条在拉拔过程中出现断裂的主要原因。

简介：分析证明了温度和时间对SWRH77B盘条性能的影响。选择一组人工时效的试验条件，进行人工与自然时效方法的对比试验，通过试验验证了可以通过选定条件下的人工时效试验来代替自然时效试验。

简介：利用扫描电子显微镜、能谱仪、光学显微镜及电子探针等对比分析了Q235B钢板拉伸试验后出现分层和不分层的两组试样，研究引起钢板拉伸分层的原因。试验结果表明：分层试样中心含有大量的MnS、Si02等夹杂，心部存在宽大的铁素体条带，是导致Q235B铜板出现拉伸分层现象的主要原因。根据分析结果提出改进措施以减少和消除此种缺陷。

简介：根据西沟矿露天采场穿孔的实际情况。对我矿所使用的KY-200B牙轮钻的钻杆从材质、转速、轴压方面进行改进，改进后的钻杆使用寿命延长一倍左右。我矿现有穿孔设备有：KQX-150潜孔钻2台、KQ-200潜孔钻、KY-200B牙轮钻2台，从而降低了钻孔的成本。

简介：对304不锈钢2B板表面边鳞缺陷进行扫描电镜和能谱分析,并结合其整个生产工艺参数分析,得出铁素体当量高是导致边鳞缺陷发生的主要原因。根据上述原因提出了相应的改进建议。

简介：Traditionally,austeniticstainlesssteels304and316havebeenemployedincoastalregionsasroofingmaterialsunfortunately,theyareexpensiveandnotfullyresistanttopittingcorrosionunderseverecoastalcorrosiveenvironment.AferriticstainlesssteelB445Rwasdeveloped.Comparedwithaustenitic316L,B445Ris①lesscostly;②uperiorcorrosionresistantwithminormaintenanceforlong-termservice;③insusceptibletothermaldistortionintheweldingseam.B445Rsheetshowsahigheryieldstrengthandlowertensilestrength,lowerelongationandlowerwork-hardeningthanaustenitic316L.Itcanbeeasilyfabricatedanddeformedjustlikeplaincarbonsteel.Afterbending180o,thereisnooccurrenceof'cracking'ornoticeable'orangepeel'.Theformabilityoftheweldingseamisalsosatisfactory.ThepittingpotentialofB445Ris650mV,largerthanthatof304and316L,asshowninFig.1.ThecorrosionrateofB445Rsubmergedin6%FeCl,solutionis0.3-0.56g/(m2?h-1),muchlowerthanthatof316L,asshowninFig.2.ThesuperiorpittingcorrosionresistanceofB445RcanbeascribedtosynergeticeffectofhigherCrandMo.Dull-finishedB445RsheetshavebeenemployedastheroofingmaterialsforGuangzhouAsianGamesArena,asshowninFig.3.About380tof1.0mmB445Rwithdullfinishwasusedforroofingpanels.About100tof0.8mmB445Rwithhairlineorfluororesinpaintfinishwasusedforsidewallpanels.Thecompositeroofbuild-up（fromuptobottom）includes:①shinglesofferriticstainlesssteelB445R;②Kalzip-typestandingseamofaustenitic304;③water-proofDFM;④structuralsteel;⑤75mmthickinsulation;⑥secondarypurlinof150mm×100mm×4.5mmofgalvaniziedQ235;⑦0.8mmthickprofiledeckofgalvaniziedQ235;⑧acousticinsulation.Theroofingshinglesorpanelswiththesamewidthbutdifferentlengthwereformedbybendingfoursidesandfixedtoa'L'shapereinforcingframesofstainlesssteelbyfasteners.The'L'frameswasconnectedtoribsofthestandingseambyacl

简介：介绍了鄂钢开发出口用英标GR460B螺纹钢的生产工艺和技术方案,并根据试制情况提出了切合实际的整改措施。

简介：介绍M84160B型轧辊磨床头架电机和砂轮电机的调速系统，分析头架电机和砂轮电机的调速系统过流原因，以及合闸后系统不工作等故障的原因。提出处理方法，并进行改进，以保证设备的正常使用。

简介：Basedontheeffectsofseveralcastingparametersonslagentrapmentinthemould(watermodeling),thenumericalmodelingwasresearched.Theresultsshowthattheflowfieldwithasubmergednozzlesectiondimensionof65mm×80mmisbetterthanthatwithasubmergednozzlesectiondimensionof40mm×40mmandisfavorableforavoidingslagentrapment.Inthispaper,lowsurfacevelocity,smalllevelfluctuationandproperimpactdepthcanbeachievedwithanozzleofanoutletangleof25°andanimmersiondepthof150mm,orwithaprototypenozzleofanoutletangleof15°angleandanimmersiondepthof150mm.

简介：Themorphologyandtheevolutionofδ-ferriteexistinginB410Dslabs,hot-rolledplates,annealedplatesandquenchedplateswerestudiedthroughmetallographicobservation.Resultsshowthatδ-ferriteformsduringthesolidificationprocessandthatiteasilygrowsandincreasesinquantityduringhightemperatureannealing.Band-shapedδ-ferriteinhotrolledplatesisdifficulttobeeliminatedbyconventionalheattreatmentandhardtorecrystallize.

简介：Thedull-finishferriticstainlesssteel(FSS)sheetB445RforarchitecturalroofinghasbeendevelopedbyBaosteel.ThissteelproductexhibitsexcellentcorrosionresistancesuperiortothatofSUS316Lwithalowercost.Itcanbeeasilyformedintoroofingpanelsbyordinaryprocesses.Moreover,thethermalstrainofitislessthanSUS316Lbecauseofitslowerthermalexpansioncoefficient,anditsreflectivityislowerduetothedull-finishtreatment.Allofthesefeaturesmakeitcapableofbeingusedasarchitecturalroofingmaterialsincoastalregions.

简介：本文简要介绍了电炉-连铸-连轧生产B7钢工艺方案的确定及生产的基本情况。从成分、性能等方面分析，该工艺生产的B7钢完全满足用户的使用要求。使用效果良好。

简介：采用金相显微分析和电镜及能谱分析方法对延伸率不合格的Q235B热轧普板进行非金属夹杂物、金相组织分析。分析结果认为Q235B热轧普板延伸率不合格是由于钢板中心存在大量的条带状MnS夹杂所致。并根据分析结果,提出提高冶炼质量,控制钢水中的硫和杂质元素的含量,对提高延伸性能十分重要的观点。

简介：中板厂生产的Q345B低合金钢板存在表面麻面缺陷,致使一定数量的钢板改判。本文通过对Q345B低合金钢板及连铸坯进行取样,结合扫描电镜和能谱分析对钢板成品板、连铸坯表面缺陷以及加热炉氧化铁皮进行分析研究,对缺陷的原因进行了剖析。

简介：简单介绍了牙轮钻钻机起落装置的液压原理，并阐述了平衡阀的作用。针对牙轮钻钻机起落装置的平衡阀应用提出了设计缺陷，并针对缺陷重新优化了钻机起落装置的液压系统。

简介：ThemicrostructuralchangesofFe83Si4B13amorphousmotheralloyduringtheheatingprocesswereinvestigatedbyLaserScanningConfocalMicroscopy（LSCM）,andthephasetransformationwasdeterminedbytheThermo-Calccalculations.ThedifferencesinthemeltingpointsmeasuredbyDifferentialScanningCalorimetry（DSC）andLSCM,andthoseobtainedbyThermo-Calccalculationswerealsodiscussed.ItisfoundthatthemeltingpointsmeasuredbyDSCandLSCMarerelativelysimilar,whereastheonsetandendofthemeltingtemperaturescalculatedbyThermo-CalcsoftwarearehigherthanthosemeasuredbyDSCandobservedbyLSCM.

简介：采朋数据统计和绘制散点图方法，分析研究Q235B普碳钢铸坯锰硫比与钢板冷弯性能和冷弯完好率之间的关系。

简介：Themicrostructuresandprecipitatesinbasemetalsandheataffectedzones(HAZs)oftwoZr-Bmicroalloyedsteelswerecharacterizedbymeansofopticalmicroscopy(OM),transmissionelectronmicroscopy(TEM)andenergydispersivespectrum(EDS).Ithasbeenfoundthatprecipitatesoftensofnanometersinsizearepresentinthebasemetalsofbothsteels.Theaverageparticlesize,however,intheZr-BsteelwithTiislargerthanthatinthesteelwithoutTi.Afterthermalsimulations,inbothcases,theMnSsulfidescannucleateoncubic(Nb,Ti)(C,N)carbonitridesandnearlysphericalZr-bearingcompounds.TheprecipitatesintheHAZsofbothsteelsarecoarserthanthoseinthebasemetals,intherangesof150-200nmand50-100nmforTiaddedandTi-freesteels,respectively.