简介：Themechanicalproperties,creepdamage,creeprupturestrengthandfeaturesofinterfacialfailuresofweldedjointsbetweenmartensite(SA213T91)andpearlitesteel(12Cr1MoV)havebeeninvestigatedbymeansofargontungstenpulsedarcwelding,hightemperatureacceleratedsimulation,creeprupture,mechanicalpropertytestsandscanningelectronicmicroscope(SEM).Theresearchresultsindicatethatthemechanicalpropertiesofovermatchedandmediummatchedjointdeteriorateobviously,andtheyaresusceptibletocreepdamageandfailureafteracceleratedsimulationoperation500h,intheconditionofpreheat250℃,andpostweldingheattreatment750℃×1h.However,themechanicalpropertiesofundermatchedjointarethebest,theinterfacialfailuretendencyofundermatchedweldedjointislessthanthoseofmediumandovermatchedweldedjoint.Therefore,itisreasonablethatlowalloymaterialTR31isusedasthefillermetalofweldbetweenSA213T91and12Cr1MoVsteel.

简介：2011年6月1日,由中国焊接协会主办,上海交通大学和中国焊接协会成套设备与专用机具分会承办的＂2011’中国焊接产业论坛暨焊接自动化＂会议在上海双拥大厦隆重举行。

简介：WeldingresearchofA6N01S-T5aluminumalloyprofileforhigh-speedtrainwasdonebyusinglaser-MIGhybridweldingandMIGweldingindividually.Andtheweldappearance,weldingdistortion,mechanicalpropertiesofthejointsandmicrostructureswereanalyzed.Thetestresultsdemonstratedthathigh-efficientweldingfortheprofilecanbeachievedbyusinglaser-MIGhybridwelding,thespeedofwhichcanbeover3.0m/min.Theprocessinghadagoodgapbridgingability，evenifthegapofthebuttjointwasupto2.0mm,agoodweldappearancecanalsobegot.Whilethehybridweldingspeedwasgreaterthan2.5m/min,theweldingdistortionofthelaser-tandemMIGhybridjointswasjustabout33%ofthatoftheMIGjoints,buttheweldingefficiencywasover3timesofMIGwelding.Andtensilestrengthofthehybridjointswas85%ofthatofA6N01S-T5basemetal,9%higherthanthatoftheMIGjoints.Fatiguepropertieswastestedindividuallywithpulsedtensilefatiguemethodintheconditionof1×107lifetime.Thetestresultsdemonstratedthatthefatiguestrengthofthejointswasalittlelowerthanthatofbasematerial,whichcouldbeupto115MPa.Butthefatiguestrengthofhybridweldingjointswas107.5MPa,whichwas23%higherthan87MPaofMIGweldingjoints.

简介：FlameheatingcombinedwithwatercoolingwasusedtostraightenA6N01aluminumalloyweldedjointandeffectofflameheatingpassonitsmicrostructureandmechanicalpropertieswasstudied.ResultsshowedthattheflameinducedtheprecipitationandgrowthoftheMg2SiphaseontheAlsubstrateforthethermalagingA6N01aluminumalloyweldedjoints,thusitledthedecreaseofmicro-hardnessandtensilestrengthoftheA6N01aluminumalloyweldedjointwiththeincreaseoftheheatingpass.However,thefatiguepropertyoftheflameheatedjointwasimprovedbecausetheMg2Siprecipitationhinderedtheinitiationandpropagationofthefatiguecrack.

简介：广州友田被评为高新技术企业广州友田机电设备有限公司一直以来围绕＂科学发展,创新品牌＂发展思路,全面展开产品研发和创新工作。公司在技术领域上的不断进步,得到了行业领域和主管部门的一致肯定。

简介：唐山松下-中集集团战略合作再升级2011年9月9日,中集集团-唐山松下焊接与自动化技术实验室签字并揭牌。唐山松下和中集集团共同设立＂中集集团-唐山松下焊接与自动化技术实验室＂,以＂实验室＂为研究基地,发挥各自优势,

简介：6月1日,由中国机械工程学会及其焊接分会主办的＂创新做强＂焊接国际论坛在上海浦东新区永达国际大厦隆重开幕。来自国内外的150多名焊接专家参加了论坛。此次论坛由＂特邀专家报告＂、＂先进焊接设备＂、＂先进焊接工艺与系统＂和＂绿色焊接与材料＂交流等四大板块组成,主要议题是：国际先进的焊接技术、企业经营发展的经验交流;如何＂创新做强＂、促进企业发展模式的转变;重大工程焊接制造的国产化、自动化、智能化成果;做专做精,

简介：继2010年成功参加北京.埃森展后,成都奥力焊研行业发展有限责任公司携旗下《现代焊接》杂志和中国焊接资讯网两大传媒再次参与此次盛会,共享行业盛举。

简介：

简介：无锡汉神召开2010～2011年度经销商高峰会议2011年1月,无锡汉神召开2010～2011年度经销商高峰会议,会议以＂改变、改进、改善、提高、提升、提速＂为主题,来自全国各地的50多家经销商齐聚汉神大家庭,共同分享成功喜悦,探讨新的一年发展大计（见图1）。

简介：焊研科技开发国内首台通过式全自动直缝焊接机成都焊研科技有限责任公司家电自动化焊接事业部通过努力,开发出国内首台通过式全自动直缝焊接专机,填补了国内空白,成为目前国内自动化程度最高的全自动直缝焊接专机。

简介：1电渣焊的特点电渣焊具有焊接效率高；焊缝金属纯净度高；焊前准备工作简单；焊接过程无弧光；焊接热循环独特；焊接参数调节范围宽等特点。

简介：Inthispaper,thebrazingmechanismofLY12aluminumalloyatmiddlerangetemperaturewaspresented.TheCsF-AlF3non-corrosivefluxwasutilizedtoremovethecomplexoxidefilmonthesurfaceofLY12aluminumalloy.TheresultsrevealedthattheoxidefilmwasremovedbytheimprovedCsF-AlF3fluxaccompaniedwiththeoccurrenceofreactionaswellasdissolutionandthecompoundsCsFplayedanimportantroletoremovetheoxidefilm.Actually,thehighactivityofflux,say,theabilitytoremovetheoxidefilm,wasduetothepresenceofthecompounds,suchasNH4F,NH4AlF4andcompositemoltensalt.TheproductionofHFwasthekeyissuetoacceleratethereactionandenhancetoeliminatetheoxidefilmbydissolution.ItwasfoundthattherareearthelementLaatsmallpercentagewasnotenrichedattheinterface.Moreover,therareearthfluorideenhancedthedissolutionbehavior.

简介：Widegapbrazing(WGB)experimentsusingthebuttedspecimenwitha1.5mmgapwerecarriedoutfortherepairofthefailedK418Bsuperalloylow-pressureturbinevanes.Thehightemperaturecreeprupturestrengthsofthebrazedjointsweretested,andthemicrostructuresandfracturesurfacesofthejointswereobserved.TheresultsshowthatthemicrostructureofK418Balloyjointiscomposedofdenseequiaxedgrain,smallanddiscretecompoundswithafewmicro-pores.Duringthecreeprupturetest,thecracksinitiatepreferentiallyatthemicro-poreorthegrainboundary,thenpropagatealongthegrainboundarytillthefracturehappens.Thecreeprupturestrengthat700℃ofthebrazedjointswith50%brazemetalintheworkingpartcouldexceed90%thatoftheK418Bsuperalloy,andthejointswith100%brazemetalintheworkingpartachieve70%to80%ofthecreeprupturestrengthsfortheK418Bbasemetal.

简介：2011年9月23日，佳士科技国内营销部第三季度工作总结会测项利召开。本次营销总结会议提出了“渗透服务，规范管理，创新思维”的指导方向，在做好2011年最后一季销售工作的同时，也为明年的市场目标打下坚实的基础。

简介：ＴｈｅｒｍａｌｂｅｈａｖｉｏｒｏｆＢ４Ｃｐａｒｔｉｃｌｅｓｕｎｄｅｒｐｌａｓｍａａｒｃｐｏｗｄｅｒｓｕｒｆａｃｉｎｇｃｏｎｄｉｔｉｏｎ￥ＷＡＮＧＸｉｂａｏ；ＺＨＡＮＧＷｅｎｙｕｅ；ＬＵＴｏｎｇｌｉａｎｄＰＥＮＧＪｉｅ(ＨｅｂｅｉＵｎｉｖｅｒｓｉｔｙ...

简介：ThevacuuminductionbrazingofSiCparticulatereinforcedLY12alloymatrixcompositeusingAl-28Cu-5Si-2Mgfillermetalhasbeencarriedout.Themicrographofthejointinterfacewasobservedbyscanningelectronmicroscopy.Thejointstrengthwasdeterminedbysheartests.Theresultsshowthatbrazingtemperature,holdingtime,SiCparticlevolumepercentageandpostheattreatmentinfluencejointstrength.SiCparticleshappeninthebrazingseamandthedistributionofSiCparticlesinthejointisnotuniform.Particle-poorzonesinthejointexistnearthebasemetal,andparticleconcentratezonesexistinthecenterofthebrazingseam.Inaddition,thefailureofthecompositeispredominantlyinitiatedbytherootingofSiCparticleinthebrazingseamandthemicro-crackexpandedalongthebrazingseamwithlowenergy.

简介：近期,重庆市发改委公布了《重庆市2014年市级重点项目名单》（以下简称《名单》）,大量与城市发展、民生改善密切相关的重点项目惹人注目。市发改委表示,今年重庆市全年计划实施重点建设项目526个,总投资2万亿元,其中年度计划投资3500亿元,

简介：

简介：Duetothedisturbancesofspatters,dustsandstrongarclight,itisdifficulttodetectthemoltenpooledgeandtheweldlinelocationinCO2weldingprocesses.Themedianfilteringandself-multiplicationwasemployedtopreprocesstheimageoftheCO2weldinginordertodetecteffectivelytheedgeofmoltenpoolandthelocationofweldline.TheB-splinewaveletalgorithmhasbeeninvestigated,theinfluenceofdifferentscalesandthresholdsontheresultsoftheedgedetectionhavebeencomparedandanalyzed.TheexperimentalresultsshowthatbetterperformancetoextracttheedgeofthemoltenpoolandthelocationofweldlinecanbeobtainedbyusingtheB-splinewavelettransform.Theproposededgedetectionapproachcanbefurtherappliedtothecontrolofmoltendepthandtheseamtracking.