Effect of WC particle size on microstructure and properties of WC-Ni wear resistant brazing coating

ZHOU Xusheng; ZOU Wei; LONG Weimin; HUANG Junlan; WANG Dezhi

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Effect of WC particle size on microstructure and properties of WC-Ni wear resistant brazing coating
Vol. 48, Issue 3, Pages: 205-210(2018)
Published：2018
DOI：
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DOI：

ZHOU Xusheng, ZOU Wei, LONG Weimin, et al. Effect of WC particle size on microstructure and properties of WC-Ni wear resistant brazing coating[J]. Eletric Welding Machine2018, 48(3): 205-210. DOI：

摘要

钎涂粉末粒度是影响耐磨涂层性能的关键因素。研究WC粒度对WC-Ni钎涂耐磨涂层组织和性能的影响

采用镍芯药皮焊条

用火焰钎涂工艺制备3种不同WC粒度的WC-Ni耐磨涂层

并用扫描电镜、能谱仪、显微硬度计和洛氏硬度计对涂层的组织和性能进行分析。结果表明:随着WC粒度的增加

Ni钎料与WC增强相的冶金反应程度减弱;WC粒度为18

3μm时

涂层界面过度层中出现了长条状的Ni W相;WC粒度为250

80μm时

涂层的洛氏硬度最高

涂层的耐磨性最好。

Abstract

Powder particle size is the key factor that affects wear resistance coating. The effect of WC granularity on the microstructure and properties of WC-Ni brazing coatings was studied. Three WC-Ni wear-resistant coatings with different WC sizes were prepared by flame brazing technology. The microstructure and properties of the coating were analyzed by scanning electron microscope

energy spectrometer

microhardness tester and rockwell hardness tester. The results show that:With the increase of WC particle size

the metallurgical reaction degree of Ni solder and WC enhanced phase decreased. When WC particle size is 18

3 μm

long strip Ni W phase appears in the overlayer of coating interface. When the WC particle size is 250

80 μm

the rockwell hardness of the coating is the highest

and the coating has the best wear resistance.