Sliding member
AssigneeDaido Metal Company Ltd.
InventorsAsako Ikegami, Takaaki Kitahara
Life of this patent
Estimating the term…
Abstract
Provided is a sliding member including: a back-metal layer and a sliding layer including a copper alloy. The back-metal layer includes a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon and has a structure including a ferrite phase and pearlite. The back-metal layer has a high ferrite phase portion at a bonding surface between the back-metal layer and the sliding layer. A volume ratio Pc and a volume ratio Ps satisfy Ps/Pc≤0.4, where the volume ratio Pc is a volume ratio of pearlite in the structure at a center portion in a thickness direction of the back-metal layer, and the volume ratio Ps is a volume ratio of pearlite in the high ferrite phase portion.
Claims7
A sliding member comprising:
- a back-metal layer having a back surface and a bonding surface;
- and
- a sliding layer comprising a copper alloy on the bonding surface of the back-metal layer,
- wherein the back-metal layer comprises a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon and has a structure comprising a ferrite phase and pearlite,
- wherein the back-metal layer comprises a high ferrite phase portion at the bonding surface, and
- wherein a volume ratio Pc and a volume ratio Ps satisfy
- Ps/Pc≤0.4
- where the volume ratio Pc is a volume ratio of pearlite in the structure at a center portion in a thickness direction of the back-metal layer, and the volume ratio Ps is a volume ratio of pearlite in the high ferrite phase portion, and
- wherein the back-metal layer consists of 0.07 to 0.35 mass % of C, not more than 0.4 mass % of Si, not more than 1 mass % of Mn, not more than 0.04 mass % of P, not more than 0.05 mass % of S, and a balance of Fe and inevitable impurities.
Dependencies are inferred from the claim text.