Investigation of crack susceptibility and microstructure of boron and silicon modified Rene 80 laser clad weld

硼硅改性Rene 80激光熔覆焊缝裂纹敏感性和显微组织研究

• 批准号: 462262-2013
• 负责人: Henein, Hani
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=542923
• 关键词: Investigation; crack; susceptibility; microstructure; boron

Precipitation hardening of high gamma-prime polycrystalline, directionally solidified and single crystal nickel based superalloys have been extensively used for the manufacture of high pressure turbine (HPT) blades and nozzle guide vanes (NGV) for several decades. However, despite their remarkable creep properties these engine components are prone to thermo-mechanical fatigue (TMF) cracking, oxidation and sulfidation due to severe service conditions. Thus, numerous welding technologies have been developed for repair of turbine engine components. Recently, Liburdi has developed new alloys (patents pending) to be used with laser welding technology for repair of these turbine blades.

几十年来，高γ '多晶、定向凝固和单晶镍基高温合金的沉淀硬化已被广泛用于制造高压涡轮机（HPT）叶片和喷嘴导向轮叶（NGV）。 然而，尽管这些发动机部件具有显著的蠕变性能，但由于恶劣的使用条件，它们易于发生热机械疲劳（thermo-mechanical fatigue，简称TMF）开裂、氧化和硫化。因此，已经开发了许多焊接技术来修复涡轮机发动机部件。最近，Liburdi开发了新的合金（专利申请中），用于激光焊接技术修复这些涡轮机叶片。