公开(公告)号：US20210095720A1

公开(公告)日：2021-04-01

申请号：US17022664

申请日：2020-09-16

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Ryo HANAI

IPC: F16C33/12 ,  C22C38/16 ,  C22C9/02 ,  F16C17/04

Abstract: A sliding member incudes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of 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 includes a pore existing region including a plurality of closed pores having an average size of 1 to 10 μm. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer and having a thickness of 2 to 20 μm. At least a part of the plurality of closed pores has contour that is partially formed by the bonding surface in a cross-sectional view. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.02 to 0.08.

公开(公告)号：US20210095719A1

公开(公告)日：2021-04-01

申请号：US17022647

申请日：2020-09-16

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Ryo HANAI

IPC: F16C33/12 ,  C22C9/00 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B32B15/01

Abstract: A sliding member includes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of 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 includes a pore existing region including a plurality of closed pores that are not open to a bonding surface when viewing a cross-section perpendicular to a sliding surface. The closed pores have an average size of 5 to 15 μm. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer, and has a thickness of 10 to 60 μm. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.05 to 0.1.