Patent ID: 7127980
Filing Date: 2006-10-31
Classification: F01L

Abstract:
1. A vane made of a metal material comprising: manganese with 14–16 weight %; silicon with 0.2–0.5 weight %; carbon with 0.6–0.7 weight %; nickel with 1.0–1.5 weight %; chromium with 0.3 weight % or less; copper with 0.3 weight % or less; and phosphorous with 0.06 weight % or less; manganese with 10–20 weight %; and carbon with 0.70% weight % or less, wherein the vane has a hard compound outer layer including Mn wherein the nitriding treatment is carried out by a gas nitriding treatment adding reducing gas, and wherein a range of nitriging treatment temperature is from 410° C. to 590° C. and a range of nitriding treatment time is from 30 minutes to 40 hours.