Fe-based hardfacing alloy

Abstract

An iron-based (Fe-based) hardfacing alloy is provided. The Fe-based hardfacing alloy has excellent wear resistance, excellent cavitation erosion resistance, and excellent corrosion resistance, thereby being substituted for a cobalt-based (Co-based) stellite alloy, which has been used for the hardfacing of a nuclear power plant valve. When the provided Fe-based hardfacing alloy is used for the hardfacing of the nuclear power plant valve, inexpensive Fe can be substituted for expensive Co and radiation fields formed by 58Co and 60Co radioactive isotopes can be efficiently reduced.

1 . A hardfacing alloy formed of 14 to 30 parts by weight of chromium (Cr), 0.4 to 2.8 parts by weight of carbon (C), which are illustrated as a portion formed by points I-VI-I of  FIG. 1 , less than 1.5 parts by weight of silicon (Si), and the remaining parts of iron (Fe).  
     
     
         2 . The hardfacing alloy of  FIG. 1 , formed of 20 parts by weight of Cr, 1.7 or 1.3 parts by weight of C, 1 part by weight of Si, and the remaining parts of Fe.  
     
     
         3 . A hardfacing alloy for a nuclear power plant valve, the hardfacing alloy formed of 14 to 30 parts by weight of Cr, 0.4 to 2.8 parts by weight of C, which are illustrated as a portion formed by points I-VI-I of  FIG. 1 , less than 1.5 parts by weight of Si, and the remaining parts of Fe.  
     
     
         4 . The hardfacing alloy of  FIG. 3 , formed of 20 parts by weight of Cr, 1.7 or 1.3 parts by weight of C, 1 part by weight of Si, and the remaining parts of Fe.  
     
     
         5 . A hardfacing alloy formed of 14 to 30 parts by weight of Cr, 0.4 to 2.8 parts by weight of C, which are illustrated as a portion formed by points I-VI-I of  FIG. 1 , less than 1.5 parts by weight of Si, 1 to 2 parts by weight of cerium (Ce), and the remaining parts of Fe.  
     
     
         6 . The hardfacing alloy of  FIG. 5 , formed of 20 parts by weight of Cr, 1.7 or 1.3 parts by weight of C, 1 part by weight of Si, 1 to 2 parts by weight of Ce, and the remaining parts of Fe.  
     
     
         7 . A hardfacing alloy for a nuclear power plant valve, the hardfacing alloy formed of 14 to 30 parts by weight of Cr, 0.4 to 2.8 parts by weight of C, which are illustrated as a portion formed by points I-VI-I of  FIG. 1 , less than 1.5 parts by weight of Si, 1 to 2 parts by weight of Ce, and the remaining parts of Fe.  
     
     
         8 . The hardfacing alloy of  FIG. 7 , formed of 20 parts by weight of Cr, 1.7 or 1.3 parts by weight of C, 1 part by weight of Si, 1 to 2 parts by weight of Ce, and the remaining parts of Fe.