激光熔覆纳米Sm<sub>2</sub>O<sub>3</sub>颗粒增强Ni基合金涂层

李明喜; 张世宏; 李辉生; 何宜柱

激光熔覆纳米Sm₂O₃颗粒增强Ni基合金涂层

安徽工业大学激光加工研究中心, 安徽马鞍山 243002

基金项目: 安徽省教育厅自然科学研究重点项目(2005KJ038ZD,2006KJ071A);安徽省高校金属材料与加工重点实验室资助项目

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- 收稿日期: 2005-12-15

Laser claded Ni-based alloy coatings reinforced by nano-Sm2O3 particles

Research Center for Laser Processing, Anhui University of Technology, Maanshan 243002, Anhui, China

摘要

摘要: 利用5 kWCO₂激光器,在Q235低碳钢表面熔覆微米或纳米Sm₂O₃/Ni基合金复合材料,制备了涂层。利用光学显微镜、扫描电镜和X射线衍射仪,比较分析了熔覆层的组织及相结构,利用显微硬度计和MM 200型环-块滑动磨损机检测了熔覆层的硬度和耐磨性。结果表明,熔覆层的主要相为γ-Ni和Cr₂₃C₆,且出现了Fe₇Sm,Ni₃Si和Ni₃B;加入稀土氧化物熔覆层的冶金结合区白亮带变窄;加入纳米Sm₂O₃不仅细化了熔覆层的组织,而且形成了大量的等轴晶;加纳米Sm₂O₃比微米Sm₂O₃的熔覆层的显微硬度和相对耐磨性大幅度提高,磨损机理由磨粒磨损和黏着磨损转变为微动磨损。
- 激光熔覆 /
- 纳米Sm₂O₃ /
- 组织结构 /
- 显微硬度 /
- 耐磨性
Abstract: Ni-based alloy coatingswith nano micro-Sm₂O₃ particles addition produced by a 5 kW CO₂ laser on Q235 low carbon steel were introduced.Cross-section of the coatings was examined to reveal their microstructure using optical microscope, scanning electron microscope, and X-ray diffractioninstrument.The hardness and wear resistance were measuredwith microhardness tester and MM200 type sliding wear machine.The results showed that γ-Ni and Cr₂₃C₆ exist inthe coatings.Fe₇Sm, Ni₃Si and Ni₃B are also foundby adding nano-Sm₂O₃.Fine microstructure and equiaxed dendrite are observed with nano-Sm₂O₃ addition.A thin layer ofmetallurgical bonding, the white and bright strip, is observed by adding the rare earth oxide.The hardness and wear resistance of the coatings with nanoSm₂O₃ addition are better than that with micro-Sm₂O₃.The mechanism was found from abrasive adhesive wear to fretting wear.
- laser cladding /
- nano-Sm₂O₃ /
- microstructure /
- microhardness /
- wear resistance

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激光熔覆纳米Sm2O3颗粒增强Ni基合金涂层

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出版历程

Laser claded Ni-based alloy coatings reinforced by nano-Sm2O3 particles

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出版历程

目录

激光熔覆纳米Sm₂O₃颗粒增强Ni基合金涂层