Other

Georgy G Lutsenko

Viktor A Efimov

Vladimir K Edemsky

Anatoly K Myakishev

Leonid A Sokirko

Vladimir B Kiselev

Georgy D Semenyaka

Jury Z Babaskin

Vladimir D Pavljuk

Leonora A Rostovskaya

Stanislav E Kondratjuk

Vadim I Tikhonovich

Bertold B Vinokur

Nikolai M Karasev

Sergei Y Shipitsyn

Cast steel

A dopant material, comprising metallic elements constituting alloy base metals and endogeneous high-melting-point compounds selected from the group consisting of titanium, zirconium, tantalum, hafnium and thorium nitrides, carbides, carbonitrides, borides and oxides. The dopant material for iron- or nickel-base alloys is produced by melting a dopant base metal, whereupon the elements required for the formation of the high-melting-point compounds selected from the group consisting of titanium, zirconium, tantalum, hafnium, thorium nitrides, carbides, carbonitrides, borides and oxides, are taken in a stoichiometric ratio and introduced into the melt. These elements are introduced into the melt at a temperature exceeding that required for the formation therein of such compounds. After that the melt with the elements introduced therein is cooled at a rate of 10.sup.2 -10.sup.7 degrees per second until high-melting-point endogeneous dispersed compounds are formed in the solidified base metal. The present invention allows the production of the dopant materials which when used for modifying makes it possible to ensure an enhancement of a total range of properties, such as high-temperature strength, thermostability, crack resistance in casings and weldings, impact toughness, corrosion and erosion resistances in various aggressive media.

Method of producing dopant material for iron or nickel-base alloys

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Kyiv, Ukraine

Georgy G Lutsenko