Rolling slide member, rolling bearing using same, and method for manufacturing rolling slide member
A rolling-sliding member that is high in hardness and continues to have a passivation film reliably even after being subjected to a process that does not require any processing for removal of scale etc., as well as a rolling bearing using the same and a method for manufacturing the rolling-sliding member.
1. A rolling-sliding member comprising:
0.15 mass % or larger and smaller than 0.70 mass % of C;
0.05 to 1.00 mass % of Si;
0.05 to 1.00 mass % of Mn;
0.03 mass % or smaller of P;
0.03 mass % or smaller of S;
0.001 to 0.500 mass % of Cu;
0.05 to 0.50 mass % of Ni;
11.0 to 18.0 mass % of Cr;
0.05 to 2.00 mass % of Mo;
0.01 to 0.50 mass % of W;
0.01 to 0.50 mass % of V;
0.05 to 0.40 mass % of N;
0.02 mass % or smaller of O;
0.080 mass % or smaller of Al;
0.0005 to 0.0050 mass % of B;
provided that the total content of C and N is larger than 0.4 mass % and smaller than 0.7 mass %, and a content ratio C/N is 0.75 or larger; and
the remainder being Fe and unavoidable impurities,
wherein
the rolling-sliding member is an outer ring of a rolling bearing, the outer ring having an outer circumferential surface, an inner surface and side surfaces on each side of the outer ring between the outer circumferential surface and the inner surface,
no Cr-deficient layer exists on the outer circumferential surface and the side surfaces of the outer ring of the rolling bearing, but a Cr-deficient layer exists on the inner surface of the outer ring of the rolling bearing,
for the outer circumferential surface and the side surfaces of the outer ring of the rolling bearing, no Cr-deficient layer exists in a region to a depth of at least 40 nm from the outer circumferential surface and the side surfaces of the rolling-sliding member, and
the rolling bearing further includes an inner ring, a plurality of rolling bodies, a holding device which holds the plurality of rolling bodies so that the plurality of rolling bodies are arranged at intervals in a circumferential direction, and sealing members that seal a space between the outer ring and the inner ring and that seal a raceway of the rolling bearing, and
the rolling bearing being used in a slide door.
2. A rolling bearing used in a slide door comprising:
an outer ring comprised of the rolling sliding member of claim 1 ;
an inner ring;
a plurality of rolling bodies disposed rollably between the outer ring and the inner ring;
a holding device which holds the plurality of rolling bodies so that the plurality of rolling bodies are arranged at intervals in a circumferential direction; and
two sealing members that seal a the space between the outer ring and the inner ring and that seal a raceway of the rolling bearing.