Iron-based corrosion resistant wear resistant alloy and deposit welding material for obtaining the alloy

Abstract

To provide a high-performance, inexpensive low C-high Si-high Cr—B—Nb type iron-based corrosion-resistant and wear-resistant alloy that is extremely superior in corrosion resistance and wear resistance to 304 stainless steel, high-chromium cast iron and high carbon-high chromium cast-iron-type materials, has a high corrosion-resistant property that would never be obtained from a high carbon-high chromium carbide precipitation-type iron-based wear-resistant alloy and at the same time, a wear-resistant property that is superior to these metals, and further hardly causes brittle peeling that is inherent to high Si—containing steel. This alloy contains, all percentages by weight, C: 0.5 to 2.5% by weight, Si: 2.5 to 4.5%, Mn: 0 to 10% or less, Cr: 15% to 31%, Ni: 0 to 16%, Cu: 7% or less, Mo: 10% or less, B: 0.5% to 3.5%, and 0≦Nb+V≦8%, and in this structure, within a range of 15% Cr≦Cr<27%, (Si×B)≦2014/Cr 2 +0.083Cr+1.05 is satisfied, within a range of 27%≦Cr≦31%, 1.25%≦(Si×B) 6.0% is satisfied, within a range of 15%≦Cr<20%, (Si×B) 570/Cr 2 −0.066Cr+1.145 is satisfied, and within a range of 20%≦Cr≦31%, (Si×B)≧1.25 is satisfied.

1 - 3 . (canceled) 
   
   
       4 . An alloy comprising: all percentages by weight,
 C: 0.5 to 2.5%,   Si: 2.5 to 4.5%,   Mn: 10% or less,   Cr: 15% to 31%,   Cu: 7% or less,   Mo: 10% or less,   B: 0.5% to 3.5%, and   0≦Nb+V≦8%,   wherein   (Si×B)≦2014/Cr 2 +0.083Cr+1.05 when 15%≦Cr<27%,   1.25%≦(Si×B)≦6.0% when 27%≦Cr≦31%,   (Si×B)≧570/Cr 2 −0.066Cr+1.145 when 15% Cr<20%, and   (Si×B)≧1.25 when 20%≦Cr≦31%.   
   
   
       5 . The alloy according to  claim 4 , further comprising:
 one kind or two or more kinds of Ni: 16% or less,   Ti: 1.0% or less,   Al: 3% or less,   rare earth metals: 0.5% or less in total, and   N: 0.2% or less.   
   
   
       6 . The alloy according to  claim 4 , wherein a wear-resistant property and a corrosion-resistant property are the same as, or superior to cobalt-based alloys, stellites No. 1 and No. 6. 
   
   
       7 . The alloy according to  claim 4 , in the form of clad welding metal or cast steel. 
   
   
       8 . The alloy according to  claim 5 , wherein a wear-resistant property and a corrosion-resistant property are the same as, or superior to cobalt-based alloys, stellites No. 1 and No. 6. 
   
   
       9 . The alloy according to  claim 5 , in the form of clad welding metal or cast steel.