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Information × Registration Number 0210U003788, 0107U005435 , R & D reports Title Development of the technology of applying heteroadditives and producing welded joints on NPP piping and investigation of the influence of heteroadditives and hydrogen on joint properties. Project 4.1. "Extension of residual service life of structural materials and welded joints in NPP equipment due to lowering of the influence of hydrogen through application of heteroadditives". popup.stage_title Head Pokhodnya Igor K., Registration Date 09-03-2010 Organization E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine popup.description2 Transition of yttrium in the weld metal is higher in 20-30 times in the case of cored wires in comparison with coated electrodes. Residual hydrogen with a maximum removal temperature of 350-360 C is formed when the yttrium content in the weld metal is above 0,013% by weight which is typical for flux-cored welding in Ar shielding gas. Hydrogen redistribution does not occur in coated electrode welding because of the low yttrium content in the welded mental (less than 0.0006% wt.). The introduction of yttrium results in better dispersion of the weld metal microstructure. Maximum values of the plastic properties and impact resistance of high tempered weld metal, performed by the electrode E-09 H1MF by GOST 9467-75 assigned for welding of heat-resistant steels, are achieved when the content of yttrium in the electrode coating is 0,05 - 0,10%. Product Description popup.authors Ігнатенко Олексій Вікторович Пальцевич Андрій Петрович Синюк Володимир Сергійович Соломійчук Тетяна Григорівна popup.nrat_date 2020-04-02 Close