Ferrous abrasion resistant sliding material

Abstract

A ferrous abrasion resistant sliding material capable of improving seizing resistance, abrasion resistance and heat crack resistance is provided. The ferrous abrasion resistant sliding material has a martensite parent phase which forms a solid solution with carbon of 0.15 to 0.5 wt %, and the martensite parent phase contains one or more types of each special carbide of Cr, Mo, W and V dispersed therein in a total content of 10 to 50% by volume.

1 . A ferrous abrasion resistant sliding material having a martensite parent phase which forms a solid solution with carbon of 0.15 to 0.5 wt %, 
 wherein said martensite parent phase contains one or more types of each special carbide of Cr, Mo, W and V dispersed therein in a total content of 10 to 50% by volume.    
   
   
       2 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains one or more elements of Cr of 6.5 wt % or more, Mo of 3.5 wt % or more and V of 3 wt % or more, and said martensite parent phase contains one or more special carbide of Cr 7 C 3 -type carbide, M 6 C-type carbide and MC-type carbide dispersed therein.    
   
   
       3 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 1.5 to 4.5 wt % and Cr of 10 to 40 wt %, with each amount being satisfied the following equation;    0.143×Cr(wt %)−1.41≦carbon(wt %)≦0.167×Cr(wt %)−0.33, and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.45 wt % and contains Cr 7 C 3 -type carbide dispersed therein in a content of at least 10 to 50% by volume.    
   
   
       4 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 0.6 to 1.9 wt %, Cr of 1 to 7 wt %, Mo of 3.5 wt % or more and (Mo+0.5×W) of 6 to 25 wt %, in which 0.5×W represents half of a real amount of W, with each amount being satisfied the following equation;    0.05×(Mo(wt %)+0.5×W(wt %))≦carbon(wt %)≦0.038×(Mo(wt %)+0.5×W(wt %))+0.42, and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.5 wt % and contains M 6 C-type carbide and MC-type carbide dispersed therein in a content of 5 to 40% by volume and in a content of 5% or less by volume, respectively.    
   
   
       5 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 1.5 to 3 wt %, Cr of 7 to 25 wt % and (Mo+0.5×W) of 6 to 15 wt %, in which 0.5×W represents half of a real amount of W, with each amount being satisfied the following equation;    0.043×(Mo(wt %)+0.5×W(wt %))+2×0.085×(Cr(wt %)−5)≦carbon(wt %)≦0.038×(Mo(wt %)+0.5×W(wt %))+0.42+2×0.085×(Cr(wt %)−5), and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.5 wt % and contains Cr 7 C 3 -type carbide and M 6 C-type carbide precipitated and dispersed therein in a content of 5 to 25% by volume and in a content of 5 to 25% by volume, respectively.    
   
   
       6 . A ferrous abrasion resistant sliding material according to any one of  claims 3  to  5 , 
 wherein said material further contains V of 3 wt % or less.    
   
   
       7 . A ferrous abrasion resistant sliding material according to any one of  claims 3  to  5 , 
 wherein said martensite parent phase contains one or more elements of Mo of 0.5 to 4 wt %, W of 0.5 to 4 wt % and V of 0.05 to 0.6 wt %.    
   
   
       8 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 2.25 to 4.5 wt %, Cr of 6.5 to 35 wt % and at least either one of V or Ti in a total content of 3 to 8 wt %, with each amount being satisfied the following equation;    0.143×Cr(wt %)−1.41+0.2×(V(wt %)−0.5+Ti(wt %))≦carbon(wt %)≦0.167×Cr(wt %)−0.33+0.2×(V(wt %)−0.5+Ti(wt %)), and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.5 wt % and contains Cr 7 C 3 -type carbide and MC-type carbide precipitated and dispersed therein in a content of 10 to 40% by volume and in a content of 5 to 15% by volume, respectively, with a total content of said carbide being 15 to 50% by volume.    
   
   
       9 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 1.3 to 3 wt %, Cr of 1 to 7 wt %, V of 3 to 8 wt %, Mo of 3.5 wt % or more and (Mo+0.5×W) of 7 to 25 wt %, in which 0.5×W represents half of a real amount of W, with each amount being satisfied the following equation;    0.05×(Mo(wt %)+0.5×W(wt %))+0.2×(V(wt %)−0.5+Ti(wt %))≦carbon(wt %)≦0.038×(Mo(wt %)+0.5×W(wt %))+0.42+0.2×(V(wt %)−0.5+Ti(wt %)), and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.45 wt % and contains M 6 C-type carbide and MC-type carbide dispersed therein in a content of 10 to 40% by volume and in a content of 5 to 15% by volume, respectively.    
   
   
       10 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains carbon of 1.5 to 3.2 wt %, Cr of 7 to 25 wt %, (Mo+0.5×W) of 5 to 15 wt %, in which 0.5×W represents half of a real amount of W, and (V+Ti) of 3 to 8 wt %, with each amount being satisfied the following equation;    0.043×(Mo(wt %)+0.5×W(wt %))+2×0.085×(Cr(wt %)−5)+0.2×(V(wt %)−0.5+Ti(wt %))≦carbon(wt %)≦0.038×(Mo(wt %)+0.5×W(wt %))+0.42+2×0.085×(Cr(wt %)−5)+0.2×(V(wt %)−0.5+Ti(wt %)), and,    wherein said martensite parent phase forms a solid solution with carbon of 0.2 to 0.5 wt % and contains Cr 7 C 3 -type carbide, M 6 C-type carbide and MC-type carbide precipitated and dispersed therein in a content of 5 to 25% by volume, in a content of in 5 to 25% by volume and in a content of 5 to 15% by volume, respectively, with a total content of said carbide being 15 to 50% by volume.    
   
   
       11 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains P of 0.2 to 1.5 wt %, and, contains one or more types of each phosphide of Fe 3 P-type, Cr 2 P-type, FeMoP-type, V 2 P-type and FeTiP-type dispersed therein in a total content of 0.5 to 10% by volume.    
   
   
       12 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains one or more elements of Si, Al, Ni and Co in a total content of 2 to 15 wt %.    
   
   
       13 . A ferrous abrasion resistant sliding material according to  claim 12 , 
 wherein said material contains Si of 0.5 to 3.5 wt % and a concentration range of carbon in said material is adjusted to be higher at a relation of 0.1× an amount of Si(wt %).    
   
   
       14 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said martensite parent phase contains Al of 3 to 15 wt % and has order transformation.    
   
   
       15 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material contains copper alloy phase dispersed therein in a content of 1 to 10% by volume.    
   
   
       16 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said martensite parent phase is a tempered martensite, which is quenched from 900 to 1000° C. and tempered at 150 to 450° C., and contains retained austenite phase in a content of 10 to 30% by volume.    
   
   
       17 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material is used for a casting floating seal member, in which said material contains said special carbide dispersed therein in a content of 20 to 50% by volume.    
   
   
       18 . A ferrous abrasion resistant sliding material according to  claim 1 , 
 wherein said material is used for to a floating seal member, in which a sliding surface thereof is at least carburized or carbonitrided so that a surface layer of said sliding surface has a structure in which a martensite parent phase forming a solid solution with carbon of 0.2 to 0.5 wt % contains said special carbide dispersed therein in a content of 20 to 70% by volume.