CARBURIZATION MEMBER EXCELLENT IN ABRASION RESISTANCE AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a carburization member excellent in abrasion resistance capable of enhancing abrasion resistance without large cost up and a manufacturing method therefor.SOLUTION: There is provided a carburization member having a chemical component containing, by mass%, C:0.10 to 0.28%, Si:0.15 to 0.35%, Mn:0.30 to 1.50%, P:0.035% or less, S:0.035% or less, Cr:1.45 to 3.00%, Mo:0.80% or less (including 0%), Al:0.020 to 0.060%, N:0.0080 to 0.0250% and the balance Fe with inevitable impurities, having a sliding surface without carburization abnormal layer, surface carbon concentration in a range of 0.70 to 0.90 mass%, troostite area percentage of a structure by depth of 50 μm from an outermost surface of 0.70% or less and the Cr percentage content and surface carbon concentration satisfying the formula 1 and the formula 2 in relationships with hardening equivalent diameter D.SELECTED DRAWING: Figure 3