STEAM TURBINE VANE MANUFACTURING METHOD

• Main Authors: HATANO KOHEI, OYAMA HIROHARU, MATSUMURA TAKUMI, MACHIDA MOTONARI, OTA TAKAHIRO, HARAGUCHI HIDETAKA
• Format: Patent
• Language: English; Korean
• Published: 25.10.2017
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM ENGINES; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

본 발명에 관한 증기터빈날개 제조방법은, 황가공 후 증기터빈날개 소재(11)에 보호부 접합면(14)을 형성하는 홈 가공공정과, 육성용접에 의하여 보호부 접합면(14)에 보호부용 육성비드(15)를 형성하는 육성용접공정과, 황가공 후 증기터빈날개 소재(11)와 함께 보호부용 육성비드(15)를 절삭함으로써, 황가공 후 증기터빈날개 소재(11)를 마무리 가공 후 증기터빈날개 소재(16)로 마무리 가공하는 가공공정을 구비하고 있다. 이 때, 황가공 후 증기터빈날개 소재(11)는, 마무리 가공 후 증기터빈날개 소재(16)보다 크고, 이와 같은 증기터빈날개 제조방법은, 황가공 후 증기터빈날개 소재(11)가 마무리 가공된 후에 육성용접에 의하여 보호부용 육성비드(15)를 형성하는 다른 증기터빈날개 제조방법과 비교하여, 육성용접에 의하여 용접 모재가 변형되는 변형량을 작게 할 수 있어, 증기터빈날개를 적절히 제작할 수 있다. This steam turbine vane manufacturing method is provided with the following steps: a groove processing step for forming a protective part connecting surface (14) on a steam turbine vane material (11) that was subjected to rough processing; a build-up welding step for forming, by build-up welding, a protective part build-up bead (15) on the protective part connecting surface (14); and a processing step for performing processing, by cutting the steam turbine vane material (11) that was subjected to rough processing and the protective part build-up bead (15), to finish the steam turbine vane material (11) that was subjected to rough processing so that the same becomes a steam turbine vane material (16) that was subjected to finishing processing. In this case, the steam turbine vane material (11) that was subjected to rough processing is larger than the steam turbine vane material (16) that was subjected to finishing processing. As compared to other steam vane manufacturing methods for forming the protective part build-up bead (15) by build-up welding after the steam turbine vane material (11) that was subjected to rough processing is subjected to finishing processing, this steam turbine vane manufacturing method can make the deformation amount of a welding substrate deformed by build-up welding smaller, and can appropriately produce a steam turbine vane.