Sliding member and method for producing sliding member

A method for producing a sliding member, comprising:

• casting an alloy layer comprising Cu as a main component and Bi on one surface of a base material;
• and
• after casting, cooling the base material at a surface of the base material opposite the alloy layer with a coolant to solidify the alloy layer in one direction,
• wherein, during cooling, when a preset set time has elapsed from a start thereof, a supply rate of the coolant is reduced to thereby control a size and number of Bi phases included in the alloy layer in a thickness direction of the alloy layer,
• wherein the alloy layer comprises a first region set to a region taking up 30% of a thickness of the alloy layer which is from an interface in contact with the base material toward the sliding surface, a second region set to a region taking up 10% of the thickness of the alloy layer which is from the sliding surface toward the base material, and, in an arbitrary observation cross section of the alloy layer, a larger number of Bi phases having larger cross-sectional areas are distributed in the second region as compared to the first region,
• wherein the Bi phases dispersed in the first region having a cross-sectional area of 250 μm2 or more have a proportion by number of 6% or less in the arbitrary observation cross section, and
• wherein the Bi phases dispersed in the second region having a cross-sectional area of 250 μm2 or more have a proportion by number of 10% or more in the arbitrary observation cross-section.