Cast iron material, seal material and the production method

Abstract

A floating sealing ring formed from a seal material composed of C, Si, Mn, Ni, Cr and the rest composed of Fe and inevitable impurities, wherein contents of said C, Si, Mn, Ni and Cr with respect to the entire cast iron material are C: 2.9 to 3.8 wt %, Si: 1.0 to 2.5 wt %, Mn: 0 to 0.8 wt % (note that 0 is not included), Ni: 3.5 to 5.0 wt %, and Cr: 2.6 to 5.5 wt %.

1 . A floating sealing ring formed from a seal material composed of C, Si, Mn, Ni, Cr and the rest composed of Fe and inevitable impurities, wherein
 contents of said C, Si, Mn, Ni and Cr with respect to the entire cast iron material are
 C: 2.9 to 3.8 wt %, 
 Si: 1.0 to 2.5 wt %, 
 Mn: 0 to 0.8 wt % (note that 0 is not included), 
 Ni: 3.5 to 5.0 wt %, and 
 Cr: 2.6 to 5.5 wt %. 
   
     
     
         2 . The floating sealing ring according to  claim 1 , wherein on a sliding surface of said floating seal ring is formed a structure, wherein a matrix structure is selected from perlite, bainite and martensite or a mixed structure of these, and a fine structure consisting of dendritic cementite and carbides of Cr is included.