Composite metal article and method of making

Abstract

A composite metal article from two dissimilar metals is prepared. A metal base is comprised of a first metal and having first and second opposing surfaces and a least one longitudinally-positioned depression in each of the first and second opposing surfaces for receiving a wire. An elongated metal element comprised of a second metal is introduced into each of the at least one first and second depressions of the metal base to form a composite assembly, and the composite assembly is heated under pressure to urge the adjacent surfaces of the second metal elements and the depressions together to form a bonded article.

1 . A composite metal article, comprising:
 a base comprised of a first metal and having first and second opposing surfaces; and   at least one elongated member comprised of a second metal, said at least one elongated member embedded in at least one of said first and second opposing surfaces and positioned along the length of the base, wherein the surface of the base containing the embedded elongated member and the opposing surface form planar surfaces, and wherein the base and the embedded, elongated member form a metallurgical bond along their interface.   
     
     
         2 . The composite article of  claim 1 , wherein the article comprises two or more elongated members embedded in at least one of said first and second surfaces. 
     
     
         3 . The composite article of  claim 2 , wherein the two or more elongated elements are embedded in opposing surfaces of the base. 
     
     
         4 . The composite article of  claim 2 , wherein the article comprises at least a pair of elongated members positioned opposite one another on opposing surface of the base and the base forms a thinned region between the elongated member pair. 
     
     
         5 . The composite article of  claim 2 , wherein the metal based is thinned in the region adjacent to the embedded elongated article and the base comprises 1 to 70% of a transverse cross-section of the article at a point where the metal base is thinnest. 
     
     
         6 . The composite article of  claim 5 , wherein the metal based is thinned in the region adjacent to the embedded elongated article and the base comprises 1 to 30% of a transverse cross-section of the article at a point where the metal base is thinnest. 
     
     
         7 . The composite article of  claim 6 , wherein the transverse cross-section of the article at a point where the metal base is at its narrowest point is comprised of 5 to 15% base metal. 
     
     
         8 . The composite article of  claim 2 , wherein the elongated member is in the form of a trench embedded in the surface of the base. 
     
     
         9 . The composite article of  claim 2 , wherein the second metal is harder than the first metal. 
     
     
         10 . The composite article of  claim 2 , wherein the elongated member is in the center of the base. 
     
     
         11 . The composite article of  claim 2 , wherein the elongated member is offset from the center of the base. 
     
     
         12 . A composite metal article, comprising:
 a base comprised of a first metal and having a first thickness at a first edge and having a tapered region on the opposing edge of the base that tapers from said first thickness to a second, smaller thickness; and   at least one edge member located adjacent to the tapered edge region of the base, the edge member comprised of a second metal and forming a metallurgical bond with a surface of the tapered region of the meal base, such that the thickness of the edge member and the tapered region of the metal base is the same as the first thickness of the metal base.   
     
     
         13 . The composite article of  claim 12 , wherein the taper is linear. 
     
     
         14 . The composite article of  claim 12 , wherein the taper is curved. 
     
     
         15 . The composite article of  claim 12 , wherein the taper is on one side of the tapered region. 
     
     
         16 . The composite article of  claim 12 , wherein the taper is on two sides of the tapered region. 
     
     
         17 . The composite article of  claim 12 , wherein the edge member comprises alternating layers of a second metal and a third metal, wherein the second metal is harder than the third metal and the second metal comprises the outermost layer of the edge member. 
     
     
         18 . The composite article of  claim 17 , wherein the first metal and the third metal are the same. 
     
     
         19 . The composite article of  claim 16 , wherein the composite article comprises two edge members, each said edge member located adjacent to opposing sides of the tapered region of the base and forming a metallurgical bond with a surface of the tapered region of the metal base, such that the thickness of the edge member and the tapered region of the metal base is the same as the first thickness of the base. 
     
     
         20 . The composite article of  claim 19 , wherein at least one of the edge members comprises alternating layers of a second metal and a third metal, wherein the second metal is harder than the third metal and the second metal comprises the outermost layer of the edge member. 
     
     
         21 . The composite article of  claim 20 , wherein the first metal and the third metal are the same. 
     
     
         22 . The composite article of  claim 12 , wherein a transverse cross-section of the article at a point where the metal base is at its narrowest point is comprised of 1 to 70% base metal. 
     
     
         23 . The composite article of  claim 22 , wherein the transverse cross-section of the article at a point where the metal base is at its narrowest point is comprised of 1 to 30%. 
     
     
         24 . The composite article of  claim 23 , wherein the transverse cross-section of the article at a point where the metal base is at its narrowest point is comprised of 5 to 15% base metal. 
     
     
         25 . The composite article of  claim 12 , wherein the second metal comprises high speed steel. 
     
     
         26 . The composite article of  claim 12 , wherein the first metal is a hot or cold rolled metal or metal alloy that is springlike. 
     
     
         27 . The composite article of  claim 12 , wherein the edge member comprises cutting teeth. 
     
     
         28 . The composite article of  claim 12 , wherein the edge member comprises a knife edge.