Aluminum alloy for compressor sliding parts, forged compressor sliding parts and manufacturing method thereof

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy for compressor sliding parts having excellent alumite property and having sufficient tensile strength. SOLUTION: Si: 8.0 mass% to 12.0 mass%, Cu: 0.6 mass% to 1.2 mass%, Mg: 0.2 mass% to 0.8 mass%, Mn: 0. It is an aluminum alloy containing 05 mass% to 0.8 mass% and the balance being Al and inevitable impurities, having a tensile strength at 25° C. of 330 MPa to 380 MPa and a circle equivalent diameter of 0.5 μm to 5 μm. The area of the Al-Mn-Si intermetallic compound having a size is 90% or more with respect to the area of the Al-Mn-Si intermetallic compound having a circle equivalent diameter of 0.5 µm or more, and Cu is 1 mass% or more. A crystallized substance that is contained and has a circle equivalent diameter of more than 5 μm does not exist. [Selection diagram] Figure 2