1.海洋关键材料全国重点实验室,中国科学院宁波材料技术与工程研究所,宁波 315201
2.中国科学院核用材料与安全评价重点实验室,沈阳 110016
刘冀(1990—),男,博士,工程师;E-mail:liuji0622@nimte.ac.cn
张阳(1998—),男,硕士;E-mail:zhangyang1998@nimte.ac.cn
收稿:2025-04-10,
修回:2025-06-08,
录用:2025-06-12,
纸质出版:2025-07-30
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刘冀,高思琪,张阳等.稀土含量对316H耐热钢渗铬层摩擦与腐蚀性能的协同调控[J].特殊钢,2025,46(04):179-188.
Liu Ji,Gao Siqi,Zhang Yang,et al.Synergistic Regulation of Rare Earth Content on the Tribological and Corrosion Performance of Chromium Infiltration Layers in 316H Heat-Resistant Steel[J].Special Steel,2025,46(04):179-188.
刘冀,高思琪,张阳等.稀土含量对316H耐热钢渗铬层摩擦与腐蚀性能的协同调控[J].特殊钢,2025,46(04):179-188. DOI: 10.20057/j.1003-8620.2025-00093.
Liu Ji,Gao Siqi,Zhang Yang,et al.Synergistic Regulation of Rare Earth Content on the Tribological and Corrosion Performance of Chromium Infiltration Layers in 316H Heat-Resistant Steel[J].Special Steel,2025,46(04):179-188. DOI: 10.20057/j.1003-8620.2025-00093.
通过固体粉末包埋法开展氧化钇(Y
2
O
3
)含量对316H耐热钢渗铬层摩擦学性能与耐腐蚀性能的影响研究。结果表明,稀土掺杂显著调控渗层形成过程,当
w
[Y
2
O
3
]为4%时,渗层厚度达最大值143.78 μm,较未添加组提升10.2%;稀土促进Cr₂C相择优生长,
w
[Y
2
O
3
]为2%时,表面显微维氏硬度提升至656HV,摩擦系数降低至0.355(降幅52.7%),磨损率减少74.5%。稀土通过加速铬扩散、细化晶粒及调控相组成优化渗层性能。然而,其作用存在浓度阈值:过量
w
[Y
2
O
3
](
>
4%)不仅大量消耗催化剂,降低活性铬原子扩散动力,而且增加表面粗糙度(Ra=235.4 nm),劣化摩擦学性能。此外,因Y
2
O
3
添加导致晶界出现贫铬现象,对耐蚀性呈现负面影响。本研究为稀土改性的渗铬工艺优化提供了理论依据,对开发高耐磨、低摩擦的表面强化技术具有重要意义。
This study investigates the effects of yttrium oxide (Y
2
O
3
) content on the tribological and corrosion resistance properties of the chromium infiltration layer in 316H heat-resistant steel through the solid powder pack cementation method. The results indicated that rare earth (Y
2
O
3
) doping significantly regulated the formation process of the infiltration layer. When the
w
[Y
2
O
3
] was 4%, the thickness of the infiltration layer reached a maximum value of 143.78 μm, which was 10.2% higher than that of the undoped group. The rare earth Y
2
O
3
promoted the preferential growth of the Cr₂C phase. When the
w
[Y
2
O
3
] was 2%, the surface micro-Vickers hardness (HV) was enhanced to 656HV, the friction coefficient was reduced by 52.7% (to 0.355), and the wear rate was decreased by 74.5%. The properties of the infiltration layer were optimized by rare earth through accelerating chromium diffusion, refining grains, and regulating phase composition. However, there was a concentration threshold for its effect: excessive
w
[Y
2
O
3
] (
>
4%) not only consumed a large amount of catalyst, reduced the diffusion driving force
of active chromium atoms, but also increased the surface roughness (Ra=235.4 nm) and deteriorated the tribological properties. Additionally, the chromium-depleted phenomenon at the grain boundaries caused by Y
2
O
3
addition had a negative impact on corrosion resistance. This research provides a theoretical basis for optimizing the rare earth modified chromium infiltration process , which is of great significance for developing surface strengthening technologies with high wear resistance and low friction.
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