一、概 述 本导向叶片是PG5301燃气轮机涡轮部分一级导向叶片(又称一级喷嘴),工作温度一般在900℃,尖锋为930℃,工作条件恶劣,因此该叶片所用合金材料应具有耐高温强度、良好的抗腐蚀、抗氧化性及优良工艺等,所以采用FSX—414钴基耐热铸造合金。 一级导向叶片是大型精铸件,因为设计要求该导向叶片五片成组制造,增加了叶片的复杂性,除一般技术要求外,内部质量要 I. Introduction This guide vane is PG5301 gas turbine turbine first-level guide vane (also known as a nozzle), the operating temperature is generally 900 ℃, the sharp front is 930 ℃, poor working conditions, so the alloy material used in the blade should have high temperature Strength, good corrosion resistance, oxidation resistance and excellent technology, so the use of FSX-414 cobalt-based heat-resistant cast alloy. A guide vane is a large castings, because the design requirements of the guide vane group of five manufacturing, increasing the complexity of the blade, in addition to the general technical requirements, the internal quality to