Non-magnetic metal alloy compositions and applications

Abstract

Disclosed are non-magnetic metal alloy compositions and applications that relate to non-magnetic metal alloys with excellent wear properties for use in dynamic three-body tribological wear environments where an absence of magnetic interference is required. In one aspect, the disclosure can relate to a drilling component for use in directional drilling applications capable of withstanding service abrasion. In a second aspect, a hardbanding for protecting a drilling component for use in directional drilling can be provided. In a third aspect, a method for prolonging service life of a drilling component for use in directional drilling can be provided.

1 .- 20 . (canceled) 
     
     
         21 . A hardbanding layer comprising:
 a composition, in wt. %, comprising Fe and:
 Mn: 8-20; 
 Nb: 2-8; 
 V: 0-3; 
 C: 1-6; 
 B: 0-1.5; 
 W: 0-10; and 
 Ti: 0-0.5; 
   hard particles having an average particle size of 100 nm to 20 μm in an amount up to 50 vol. %;   a macro-hardness of 40 HRC or greater; and   a relative magnetic permeability of less than 1.02.   
     
     
         22 . The hardbanding layer of  claim 21 , wherein the hardbanding layer comprises an austenitic matrix. 
     
     
         23 . The hardbanding layer of  claim 21 , wherein the hard particles have an average size of between 1-5 μm in an amount up to 30 vol. %. 
     
     
         24 . The hardbanding layer of  claim 21 , wherein the composition further comprises chromium. 
     
     
         25 . The hardbanding layer of  claim 24 , wherein the composition further comprises, in wt. %, Cr: 15-18. 
     
     
         26 . The hardbanding layer of  claim 21 , wherein the composition contains no boron. 
     
     
         27 . The hardbanding layer of  claim 21 , wherein the composition is characterized as having a magnetic permeability of less than 1.01. 
     
     
         28 . The hardbanding layer of  claim 21 , wherein the composition is characterized as having a magnetic permeability of less than 1.005. 
     
     
         29 . The hardbanding layer of  claim 21 , wherein the composition is characterized as having no magnetic permeability. 
     
     
         30 . The hardbanding layer of  claim 21 , wherein the hardbanding layer is formed by metal inert gas welding. 
     
     
         31 . The hardbanding layer of  claim 21 , wherein the macro-hardness of the hardbanding layer is greater than 50 HRC. 
     
     
         32 . A wire configured for welding, the wire comprising:
 a composition, in wt. %, comprising Fe and:
 Mn: 8-20; 
 Nb: 2-8; 
 V: 0-3; 
 C: 1-6; 
 B: 0-15; 
 W: 0-10; and 
 Ti: 0-0.5; 
   wherein the wire is configured to form a welded hardbanding layer comprising:
 hard particles having an average particle size of 100 nm to 20 μm in an amount up to 50 vol. %; 
 a macro-hardness of 40 HRC or greater; and 
 a relative magnetic permeability of less than 1.02. 
   
     
     
         33 . The wire of  claim 32 , wherein the wire further comprises an austenitic matrix. 
     
     
         34 . The wire of  claim 32 , wherein the composition further comprises chromium. 
     
     
         35 . The wire of  claim 34 , wherein the composition further comprises in wt. % Cr: 15-18. 
     
     
         36 . The wire of  claim 32 , wherein the composition contains no boron. 
     
     
         37 . The wire of  claim 32 , wherein the composition is characterized as having a magnetic permeability of less than 1.01. 
     
     
         38 . The wire of  claim 32 , wherein the composition is characterized as having a magnetic permeability of less than 1.005. 
     
     
         39 . The wire of  claim 32 , wherein the composition is characterized as having no magnetic permeability. 
     
     
         40 . The wire of  claim 32 , wherein the welded hardbanding layer is formed by metal inert gas welding.