激光熔覆纳米Sm<sub>2</sub>O<sub>3</sub>/Co基涂层的硬度及耐磨性

丁林; 蒋红云; 李明喜

doi:10.15980/j.tzzz.2013.09.010

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专辑

激光熔覆纳米Sm₂O₃/Co基涂层的硬度及耐磨性
Hardness and Wear-resistance of Laser Cladding Nano-Sm₂O₃/Co-based Alloy Coating
2013年33卷第9期页码：805-808
纸质出版日期： 2013 ，
DOI： 10.15980/j.tzzz.2013.09.010

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[1]丁林,蒋红云,李明喜.激光熔覆纳米Sm_2O_3/Co基涂层的硬度及耐磨性[J].特种铸造及有色合金,2013,33(09):805-808.

Ding Lin, Jiang Hongyun, Li Mingxi. Hardness and Wear-resistance of Laser Cladding Nano-Sm₂O₃/Co-based Alloy Coating[J]. Special Casting & Nonferrous Alloys, 2013,33(9):805-808.
[1]丁林,蒋红云,李明喜.激光熔覆纳米Sm_2O_3/Co基涂层的硬度及耐磨性[J].特种铸造及有色合金,2013,33(09):805-808. DOI： 10.15980/j.tzzz.2013.09.010.

Ding Lin, Jiang Hongyun, Li Mingxi. Hardness and Wear-resistance of Laser Cladding Nano-Sm₂O₃/Co-based Alloy Coating[J]. Special Casting & Nonferrous Alloys, 2013,33(9):805-808. DOI： 10.15980/j.tzzz.2013.09.010.

摘要

采用横流CO2激光器在低碳钢表面制备了纳米Sm2O3/Co基合金熔覆层

利用光学显微镜、X射线衍射仪、显微硬度计和MM 200型环-块滑动磨损机

比较分析了激光熔覆层的相组成、微观组织

并测试其硬度及磨损性能。结果表明

熔覆层的主要相为γ-Co和Cr23C6

并观察到了Fe7Sm和ε-Co;结合界面处存在一条"白亮带"

说明基体与涂层粉末获得良好的冶金结合。纳米Sm2O3/Co基合金熔覆层的枝晶组织细小均匀

枝晶的方向性减弱

且纳米Sm2O3含量越多

越明显。纳米Sm2O3的加入

使涂层的显微硬度及耐磨性均有所提高

纳米Sm2O3含量为1.0%的熔覆层的硬度和耐磨性最好。

Abstract

Nano-Sm2O3/Co-based composite coating was prepared on low carbon steel surface by transverse flow CO2 laser.The microstructure

phase compositions

micro-hardness

and wear resistance of the laser cladding layers were analyzed and tested by optical microscope

X-ray diffractometer

microhardness equipment and MM 200 circle-mass friction and wear testing ring.The results show that the cladding coating is composed of γ-Co

Cr23C6

Fe7Sm and ε-Co.A"bright band"can be observed on the bonding position

showing good metallurgical bonding between coating and alloy powder.Uniform and fine dendrite can be observed in cladding layer of the nano-Sm2O3/Co based alloy coating with the fading of the orientation of dendrite

meanwhile

with the increase of nano-Sm2O3 content

the microstructure is more and more homogeneous.With Sm2O3 addition

the micro-hardness and wear resistance of coatings are improved

and when nano-Sm2O3 is 1.0%

the micro-hardness and wear resistance of coatings exhibit desirable.