微锻技术增强IN718高温合金防腐性能及机理研究
Study on Corrosion Resistance and Mechanism of Enhanced IN718 Super alloy by Machine Hammer Penning Technology
冯广煜 1李亚萍 2黄哲伟 1刘启 1麦嘉琪 2沈彬1
作者信息
- 1. 上海交通大学机械与动力工程学院,上海 200240
- 2. 上海飞机制造有限公司,上海 200126
- 折叠
摘要
高温合金是深海海底油气开采设备最可靠的材料之一.然而,腐蚀失效仍然是高温合金零件失效的主要原因,因此,开发高温合金表面防腐与延寿技术具有重要价值.本文提出采用微锻头对零件表面的机械冲击作用,实现IN718高温合金表面防腐与延寿,结果表明,微锻通过降低表面粗糙度和提高表面残余压应力明显提升了合金的防腐性能;但随着微锻冲击次数的增加,合金表面防腐性能呈现明显的衰退趋势.该工艺方案具备高可控性与高灵活性,为使用微锻技术提升深海海底油气开采设备服役寿命提供了坚实的理论基础.
Abstract
IN718 superalloy is one of the most reliable materials under the working conditions of deep-sea submarine oil and gas extraction equipment.However,corrosion failure is the main cause of failure of superalloy parts.Therefore,the development of long-term anti-corrosion and life extension technology on the surface of superalloy has important value.In this paper,mechanical impact on the surface of the part is proposed to achieve long-term corrosion resistance and life extension on the surface of the superalloy.Result shows that Machine Hammer Penning(MHP)significantly improves the anti-corrosion performance of the alloy by decreasing surface roughness and increasing residual compressive stress.However,with the increase of the number of impacts,the anti-corrosion performance of the alloy surface shows an obvious decline trend.The process has high controllability and flexibility,providing a solid theoretical basis for using MHP technology to improve the service life of deep-sea oil and gas extraction equipment.
关键词
IN718高温合金/微锻/防腐性能Key words
IN718 superalloy/machine hammer penning(MHP)/anti-corrosion performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据