Method for manufacturing a wear resistant component having mechanically interlocked cemented carbide bodies

Abstract

A method for manufacturing a wear resistant component includes the steps of providing a metallic base material and a wear resistant cemented carbide body including an anchoring portion. The wear resistant cemented carbide body is arranged such that the anchoring portion is at least partially enclosed by the metallic base material. The metallic base material and the least one wear resistant cemented carbide body is subjected to Hot Isostatic Pressing (HIP). A layer of Al 2 O 3 or hBN is arranged between the anchoring portion and the metallic base material.

1 . A method for manufacturing a wear resistant component comprising the steps:
 providing a metallic base material and at least one wear resistant cemented carbide body, wherein the cemented carbide body includes a top portion which is arranged to extend over at least a section of the surface of the metallic base material and an anchoring portion which is arranged to be retained mechanically by the metallic base material in the final wear resistant component;   arranging the wear resistant cemented carbide body such that the top portion extends over at least a section of the surface of the metallic base material and such that the anchoring portion at least partially is enclosed by the metallic base material;   sealing the arrangement of the wear resistant cemented carbide body and the metallic base material;   subjecting the metallic base material and the least one wear resistant cemented carbide body to Hot Isostatic Pressing by heating at a predetermined temperature and at a predetermined pressure for a predetermined time period; and   arranging a layer of alumina (Al 2 O 3 ) or hexagonal boron nitride (hBN) between at least the anchoring portion of the wear resistant cemented carbide body and the metallic base material.   
     
     
         2 . The method according to  claim 1 , wherein the layer is applied on at least the anchoring portion of the wear resistant cemented carbide body. 
     
     
         3 . The method according to  claim 1 , wherein the layer is applied on the metallic base material. 
     
     
         4 . The method according to  claim 1 , wherein the layer consists is made of alumina (Al 2 O 3 ) or hexagonal boron nitride (hBN). 
     
     
         5 . The method according to  claim 1 , wherein the layer consists is made of Al 2 O 3  and wherein an intermediate layer of Ti is arranged between the Al 2 O 3  layer and the surface of the wear resistant cemented carbide body. 
     
     
         6 . The method according to  claim 5 , wherein the intermediate layer is TiC or TiN or a mixture of TiC and TiN. 
     
     
         7 . The method according to  claim 4 , wherein the layer is made of Al 2 O 3 , the thickness of the layer being 2 μm-10 μm. 
     
     
         8 . The method according to  claim 1 , wherein the layer is made of hBN, the layer having a thickness of 10 μm-500 μm. 
     
     
         9 . The method according to  claim 1 , wherein the layer is made of a first layer of Al 2 O 3  and a second layer of hBN. 
     
     
         10 . The method according to  claim 1 , wherein the anchoring portion of the wear resistant cemented carbide body has a drop shaped cross-section. 
     
     
         11 . The method according to  claim 1 , wherein the metallic base material is selected from an iron based alloy, a cobalt based alloy, a nickel based alloy and a Metal Matrix Composite (MMC). 
     
     
         12 . The method according to  claim 1 , wherein the metallic base material is an iron based ferritic steel alloy. 
     
     
         13 . The method according to  claim 1 , wherein the metallic base material is a solid metallic body, the at least one recess being formed in the metallic base material, and the anchoring portion of the wear resistant cemented carbide body being arranged in the recess. 
     
     
         14 . The method according to  claim 1 , wherein the metallic base material is powder, the anchoring portion of the wear resistant cemented carbide body being arranged such that the anchoring portion is at least partially enclosed by the metallic base material powder. 
     
     
         15 . A wear resistant component comprising a metallic base material and at least one wear resistant cemented carbide body made by the method according to  claim 1 . 
     
     
         16 . The wear resistant component of  claim 15 , wherein the layer of Al 2 O 3  or hBN extends along an interface between the cemented carbide body and the metallic base material. 
     
     
         17 . The method according to  claim 4 , wherein the layer is made of Al 2 O 3 , the thickness of the layer being 4 μm-8 μm.