简介:摘要本文从压力容器行业埋弧焊工艺特点入手,介绍了产生气孔的一般原因,通过长期的观察、试验,找到了产生气孔的特殊原因,并提出了解决措施,进一步完善了埋弧焊工艺。
简介:Mostoftheinvestigationsregardingfrictionstirwelding(FSW)ofaluminumalloyplateshavebeenlimitedtoabout5to6mmthickplates.InpriorworkconductedthevariousaspectsconcerningtheprocessparametersandtheFSWtoolgeometrywerestudiedutilizingfrictionstirweldingof12mmthickcommercialgradealuminumalloy.Twodifferentsimple-tomanufacturetoolgeometrieswereused.TheeffectofvaryingweldingparametersanddwelltimeofFSWtoolonmechanicalpropertiesandweldqualitywasexamined.Itwasobservedthatinordertoachieveadefectfreeweldingonsuchthickaluminumalloyplates,toolhavingtrapezoidalpingeometrywassuitable.Adequatetensilestrengthandductilitycanbeachievedutilizingacombinationofhightoolrotationalspeedofabout2000r/minandlowspeedofweldingaround28mm/min.Atverylowandhighdwelltimetheductilityofweldedjointsarereducedsignificantly.
简介:旁承座是车体枕梁与转向架通过弹簧组连接的承载部件,是机车核心受力部件之一,所以对焊缝质量要求较高。本文对HXD1B型电力机车车体枕梁旁承座采用自动化焊接的可行性进行了分析和研究,形成了合理可行的枕梁旁承座自动焊焊接工艺。