COMPOSITE BILLET WITH POROSITY FRACTION CONTROLLED IN, AT LEAST, ONE LAYER, METHODS OF ITS PRODUCTION AND USE Russian patent published in 2012 - IPC B22F7/04 B22F5/12

Abstract RU 2468890 C2

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy, particularly, to production of clad billet for hot metal forming. Said blank may be used for making clad tubes. Multicomponent composite billet comprises full-density component and component with preset porosity exceeding zero to create plastic yield strain comparable to that of structural component. Said components are bonded by diffusion. Preset porosity is kept in porous component by applying temperature and pressure for preset time including hot isostatic pressing.

EFFECT: ruled out defects, higher quality.

27 cl, 16 dwg, 2 tbl

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RU 2 468 890 C2

Authors

Varke Virendra S.

Mashl Stefen Dzh.

Dates

2012-12-10—Published

2009-04-24—Filed