Patent ID: 8257514
Filing Date: 2012-09-04
Classification: B22D,C21D,C22C

Abstract:
1. A ferrous seal sliding part having a seal sliding surface, wherein said seal sliding surface has a martensite parent phase which forms a solid solution with carbon of 0.15 to 0.6 wt % and contains a first dispersion material of at least either cementite of 5 to 70% by volume or MC-type carbide of 0.1 to 10% by volume and a second dispersion material of at least either graphite of 1 to 15% by volume or Cu alloy phase of 1 to 20% by volume dispersed therein, with a total content of said first dispersion material and said second dispersion material being 5 to 70% by volume, wherein said seal sliding surface is formed by using a cast iron containing carbon of 2 to 5 wt %, Si of 0.5 to 6 wt %, Al of 1.0 to 6 wt % and Cr of 0.3 to 5 wt %, and one or more alloy element selected from the group consisting of V, Ti, Zr, Nb and Ta in a total amount of 2.51 to 5 wt %, and one or more alloy element selected from the group consisting of Mn of 0.1 to 5 wt %, Ni of 1 to 7 wt %, Cu of 1 to 10 wt %, Co of 2 to 15 wt %, Mo and Win a total amount of 0.5 to 2 wt %, P of 1.22 wt % or less, B, Ca and S, and a balance of Fe.