METHOD OF MANUFACTURING COMPOSITE METAL ARTICLE Russian patent published in 1999 - IPC

FIELD: manufacture of composite metal articles from at least two grades of stainless steel for obtaining of decorative pattern, for instance, for manufacture of knife blade with damask pattern. SUBSTANCE: method includes manufacture of composite metal article consisting of at least two materials from stainless steel of different chemical compositions joined with each other by plastic metal working at pressure exceeding 60 MPa and temperature above 1000 C. Prior to this, at least two materials from stainless steel are placed in definite manner in capsule from which air is evacuated. Capsule is closed and subjected to pressure to obtain solid body. In so doing, at least one of two materials from stainless steel consists of powder before compaction. The method is distinguished by the fact that at least two materials from stainless steel prior to working for obtaining of solid body are placed in capsule by separate layers. EFFECT: hardened cutting edge in manufacture of cutting tools accompanied with high corrosion resistance and possible production of decorative effect in the form of pattern similar to pattern of damask steel. 19 cl, 8 dwg