Development of braze repair technology for Ni-Al-Bronze (NAB) propellers

镍铝青铜（NAB）螺旋桨钎焊修复技术的开发

• 批准号: 472295-2014
• 负责人: Huang, Xiao
• 金额: $ 1.64万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=564711
• 关键词: Development; braze; repair; technology; Ni

A large number of propellers for large ships are made of Ni-Al-Bronze (NAB). During service, damages occur due to corrosion, foreign object impact and erosion/wear. Replacement cost of these propellers is in the range of several to tens of thousands of dollars. As such there is a demand to repair/restore these costly parts. Dominis Engineering is currently using a fusion welding process to repair NAB propellers. This process is labour intensive and has a long lead time as every defect has to be welded manually. Furthermore, the welding process often results in cracking and distortion which will require repeated welding, straightening, re-pitching and heat treatment. In order to provide a large scale, fast turnaround propeller repair service to its customers, Dominis Engineering is seeking a more efficient process which allows them to repair all defects on multiple parts in a batch process.

大量用于大型船只的螺旋桨由Ni-Al-Bronze（NAB）制成。在服务期间，由于腐蚀，异物撞击和侵蚀/磨损而造成损害。这些螺旋桨的替代成本在数千美元的范围内。因此，需要维修/恢复这些昂贵的零件。 Dominis Engineering目前正在使用融合焊接工艺来维修NAB螺旋桨。这个过程是劳动密集型的，并且有很长的提前时间，因为必须手动焊接每个缺陷。此外，焊接过程通常会导致破裂和失真，这将需要重复焊接，拉直，重新插入和热处理。为了向其客户提供大规模，快速的周转螺旋桨维修服务，Dominis Engineering正在寻求更有效的过程，使他们可以在批处理过程中修复多个零件上的所有缺陷。