Manufacturing method of sintered alloy, sintered-alloy compact, and sintered alloy

A manufacturing method of a sintered alloy comprising:

• pressing mixed powder that contains first hard particles, second hard particles, graphite particles, and iron particles into a sintered-alloy compact;
• and
• sintering the sintered-alloy compact while diffusing carbons in the graphite particles of the sintered-alloy compact into the first hard particles, the second hard particles, and the iron particles, wherein
• the first hard particles contain 10 to 50 mass % of Mo, 3 to 20 mass % of Cr, 2 to 15 mass % of Mn, 1 mass % or less of C, and a remainder including Fe and inevitable impurities when the first hard particles have 100 mass %,
• the second hard particles contain 60 to 70 mass % of Mo, 2 mass % or less of Si, and a remainder including Fe and inevitable impurities when the second hard particles have 100 mass %, and
• the mixed powder contains 5 to 50 mass % of the first hard particles, 1 to 8 mass % of the second hard particles, and 0.5 to 1.0 mass % of the graphite particles when total mass of the first hard particles, the second hard particles, the graphite particles, and the iron particles is set as 100 mass %.