铸造技术2024，Vol.45Issue(4)：349-355,7.DOI:10.16410/j.issn1000-8365.2024.4045
GH4169合金低温渗硼层结构与耐磨性能研究
Study on the Microstructure and Tribological Properties of a Low-temperature Boronizing Layer on GH4169 Alloy
摘要
Abstract
GH4169 is a classical superalloy material with good high-temperature strength,fatigue strength and corrosion resistance but also suffers from low surface hardness and poor wear resistance.Boronising treatment is one of the most effective approaches for improving the surface properties of GH4169 alloys.However,due to the high boriding temperature(i.e.,above 900℃),the precipitated phase structure obtained during the aging treatment is destroyed,which affects the mechanical performance.In the present study,a GH4169 alloy was successfully boronised under ageing conditions,and a dense boride layer with a thickness of～8.2 μm was obtained.The boride layer is composed of mixed Cr5B3,Cr2B,Ni2B and FexNi23-xB6 phases and has an ultrahigh hardness of 2 622.9 HV0.1.Additionally,ultralow wear rates(8.5×10-6 mm3/N·m)are obtained when friction occurs against Si3N4 balls.The findings of the present study will be beneficial for the practical use of boronising treatment in nickel-based superalloys.关键词
高温合金/低温硼化/催渗剂/磨损机制Key words
nickel-based superalloy/low temperature boronising/activator/wear mechanism分类
矿业与冶金引用本文复制引用
官磊,邵孟雪,胡晨阳,陈树群..GH4169合金低温渗硼层结构与耐磨性能研究[J].铸造技术,2024,45(4):349-355,7.基金项目
北京市科协青年人才托举工程(BYESS2023059) （BYESS2023059）
