Coated cutting tool, cutting member or wear part

Abstract

A coated metal substrate has at least one layer of titanium based hard material alloyed with at least one alloying element selected from the list of chromium, vanadium and silicon. The total quantity of alloying elements is between 1% and 50% of the metal content, the layer having a general formula of: (Ti 100-a-b-c Cr a V b Si c )C x N y O z .

1 . A coated metal substrate comprising at least one layer of titanium based hard material alloyed with at least one alloying element selected from the list of chromium, vanadium and silicon, wherein the total alloying element content is between 0.1% and 50% of the total metal content; the layer having a general formula of (Ti 100-a-b-c Cr a V b Si c )C x N y O z , where x+y+z=1 and a+b+c>0. 
     
     
         2 . The coated metal substrate of  claim 1 , wherein the substrate comprises a cutting tool. 
     
     
         3 . The coated metal substrate of  claim 1 , wherein the substrate comprises a cutting member. 
     
     
         4 . The coated metal substrate of  claim 1 , wherein the substrate comprises a wear part. 
     
     
         5 . The coated metal substrate of  claim 4 , wherein the wear part is one selected from the group consisting of: a machine part, a textile machine part, a ball bearing, a roller bearing, a moving part in a heat exchanger, a turbo loader, a gas-turbine, an exhaust valve, a nozzle, a manufacturing process die, an extrusion die, a wire drawing die, a punch, a blanking tool, a hot forging die, a press, a mold, a shear blade, a plunger rod, a plunger ball blank, a down hole pump check valve blanks, and a bushing. 
     
     
         6 . The coated metal substrate of  claim 1 , wherein 70% of the total metal content in the at least one layer comprises titanium. 
     
     
         7 . The coated metal substrate of  claim 1 , wherein between 0.1% and 30% of the total metal content in the at least one layer is chromium. 
     
     
         8 . The coated metal substrate of  claim 1 , wherein between 0.1% and 30% of the total metal content in the at least one layer is vanadium. 
     
     
         9 . The coated metal substrate of  claim 1 , wherein between 0.1% and 30% of the total metal content in the at least one layer is silicon. 
     
     
         10 . The coated metal substrate of  claim 1 , wherein the coating further comprises at least a first layer of alumina. 
     
     
         11 . The coated metal substrate of  claim 1  wherein the substrate comprises a material selected from the group comprising high speed steel alloys, super hard materials, cermets, cemented carbides, TiC, TiN, WC—Co, carbon steels, low alloyed steels, austenitic stainless steels, ferritic stainless steels, martensitic stainless steels, tool steels, nickel and cobalt super alloys, oxide ceramics and nitride ceramics. 
     
     
         12 . The coated metal substrate of  claim 1  wherein the substrate comprises hard metal. 
     
     
         13 . A method of forming a coated cutting member or a coated wear part, comprising the steps of:
 (a) Obtaining a substrate fabricated from a selected material and having an appropriate geometry;   (b) placing the substrate in a chemical vapor deposition reaction chamber, and   (c) depositing an alloyed coating layer of (Ti 100-a-b-c Cr a V b Si c )C x N y O z , where x+y+z=1 and a+b+c>0, by chemical vapor deposition.   
     
     
         14 . The method of  claim 13 , wherein step (c) of depositing an alloyed coating layer of (Ti 100-a-b-c Cr a V b Si c )C x N y O z  comprises reacting a mixture of metal halides and gases selected from the list of nitrogen, hydrogen and methane. 
     
     
         15 . The method of  claim 14 , wherein step (c) further comprises vapors of at least one organic compound selected from the list of organic compounds containing carbon, organic compounds containing nitrogen, and organic compounds containing oxygen. 
     
     
         16 . The method of  claim 15 , wherein the metal halides are metal chlorides. 
     
     
         17 . The method of  claim 15 , wherein the metal chlorides comprise titanium chloride and chlorides of alloying metals selected from the list of chromium chloride, vanadium chloride and silicon chloride. 
     
     
         18 . The method of  claim 15 , wherein the ratio of partial pressure of titanium halide to partial pressure of halide of alloying metal is between 1:1 and 99:1. 
     
     
         19 . The method of  claim 15 , wherein partial pressure of chromium halide is between 0.1% and 30% of total partial pressure of metal chloride in the CVD reaction chamber. 
     
     
         20 . The method of  claim 15 , wherein partial pressure of vanadium halide is between 0.1% and 30% of total partial pressure of metal chloride in the CVD reaction chamber. 
     
     
         21 . The method of  claim 15 , wherein partial pressure of silicon halide is between 0.1% and 30% of total partial pressure of metal chloride in the CVD reaction chamber. 
     
     
         22 . The method of  claim 15 , further comprising: preparing the substrate by a process including at least one of degreasing, sandblasting and washing. 
     
     
         23 . The method of  claim 15 , further comprising: depositing at least one previous coating layer prior to deposition of the alloyed coating layer. 
     
     
         24 . The method of  claim 15 , further comprising: depositing subsequent coating layers onto the alloyed coating layer. 
     
     
         25 . The method of  claim 15 , wherein the alloyed coating layer is deposited at a temperature in the range of 720° C. to 1100° C.