증기 터빈 동익 및 증기 터빈 동익의 제조 방법

• Main Authors: OIKAWA SHINJI, DOI HIROYUKI, ARAI MASAHIKO, YODA HIDEO
• Format: Patent
• Language: Korean
• Published: 03.11.2017
• Subjects: ALLOYS; BLASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; HEATING; LIGHTING; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM ENGINES; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WELDING; WORKING BY LASER BEAM

내마모성 및 신뢰성을 양립한 증기 터빈 동익 및 이와 같은 증기 터빈 동익을 얻는 것이 가능한 증기 터빈 동익의 제조 방법을 제공한다. 본 발명에 따른 증기 터빈 동익은, 날개 기재와, 상기 날개 기재의 표면에 형성된 에로전 실드를 갖고, 상기 날개 기재는, 티타늄 합금으로 이루어지며, 상기 에로전 실드는, 금속 원소가 고용된 순 티타늄 또는 금속 원소가 고용된 티타늄 합금으로 이루어지는 모상(30)과, 상기 모상 중에 분산된 경질상(31)을 포함하는 용접 패딩층으로 이루어지는 것을 특징으로 한다. A steam turbine rotor blade achieving both abrasion resistance and reliability, and a method for manufacturing a steam turbine rotor blade capable of obtaining such a steam turbine rotor blade are provided. A steam turbine rotor blade according to the invention is characterized by including a blade base material and an erosion shield formed on a surface of the blade base material, wherein the blade base material is composed of a titanium alloy, and the erosion shield is composed of a weld overlay layer including a parent phase (30) composed of pure titanium in which a metal element is solid-dissolved or a titanium alloy in which a metal element is solid-dissolved, and a hard phase (31) dispersed in the parent phase.