IRT를 적용한 7FA+(e)형 가스터빈 블레이드의 열원에 따른 NDE에 관한 연구

Gas turbine is operating on the condition of high temperature & pressure. And starts & shutdowns frequently for high-peak load demand. Therefore main components of gas turbine were damaged frequently and required high maintenance cost. it is used nickel-base superalloys like IN738 and GTD-111OS. Damaged buckets on the tip during operating are repaired per 24,000hr to three times according to manufacture specification. But diagnosis and maintenance of main components is accomplished by maker, The cost of diagnosis and maintenance is required excessively by maker. In this research, Applied heating system that use Electric resistance, hot air, halogen lemp to heat source that is used to IRT. Did coating class integrity estimation of the 1st Stage Bucket on Gas Turbine applying each heat sources.