| Investigation on mechanism of reducing diffusible hydrogen in weld using microelements |
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| 作者姓名： | DU Zeyu DING Ping ZHANG Wenyue |
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| 作者单位： | Materials Science and Engineering Department，Tianjin University. Tianjin. 300072. P.R. China |
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| 摘 要： | 0IlltroductionRareearthshavethefunctionofreducinghydrogenduringweldingmetallurgy,andhavenotableeflbctonimprovingthecrackingresistanceinweldedjoint.RareelementTealsocangreatlydecreasetheditTusiblehydrogeninweldbead,andimprovethecoldcrackingresistancepropertyinweldedjoint.Inthisthesis,theinfluenceofmicroelementsyttrium(Y)andtclluriunl(Te)ontheditTusiblehydrogeninweldbeadandonthecoldcracldngsusceptibilityofxveldedjointhasbeeninvestigated,andthemechanismofmicroelementshasbeenanalyzed.lTestmethod…
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Investigation on mechanism of reducing diffusible hydrogen in weld using microelements |
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| DU Zeyu,DING Ping,ZHANG Wenyue.Investigation on mechanism of reducing diffusible hydrogen in weld using microelements[J].China Welding,1997(2). |
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| Authors: | DU Zeyu DING Ping ZHANG Wenyue |
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| Abstract: | In this paper. the influence of microelements yttrium (Y) and tellurium (Te) on the diffusible hydrogen in weld bead has been investigated in a systemic way by means of alloying addition in the molten pool (AAMP). The results indicate that AAMP can notably reduce the diffusible hydrogen, economize the precious microelements and improve the technological properlies. Thus the microelements will play an important role in further developing the welding materials. This paper lays emphasis on the discussion of the mechanism of redicing hydrogen by microelements Y and Te. it is considered from the results that both Y and Te belong to surface active elements and can reduce the diffusible hydrogen in weld bead beeause they can change the surface properlies of molten pool metal and reduce the absorption of hydrogen atom in arc space of liquid metal surface. This research has a great significance in the development and utilization of microelements in welding. |
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| Keywords: | microelements diffusible hydrogen surface active elements weld bead |
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