Microstructural and Mechanical Study of Inconel 625 – Tungsten Carbide Composite Coatings Obtained by Powder Laser Cladding

Archives of Metallurgy and Materials

Huebner J.¹  Rutkowski P.¹  Kata D.¹  Kusiński J.² 

[1] AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Krakow, Poland;AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland;

关键词: Laser cladding;    Inconel 625;    Tungsten Carbide;    Metal Matrix Composites;    Rapid prototyping;   

DOI  :  10.1515/amm-2017-0078

来源: DOAJ

【 摘 要 】

This study focuses on the investigation of fine (~0.54 μm) tungsten carbide particles effect on structural and mechanical properties of laser cladded Inconel 625-WC composite. Three powder mixtures with different Inconel 625 – WC weight ratio (10, 20 and 30 weight % of WC) were prepared. Coatings were made using following process parameters: laser beam diameter ø ≈ 500 μm, powder feeder rotation speed – 7 m/min, scanning velocity – 10 m/min, laser power – 220 W changed to 320 W, distance between tracks – 1 mm changed to 0.8 mm. Microstructure and hardness were investigated. Coatings produced by laser cladding were crack and pore free, chemically and structurally homogenous. High cooling rate during cladding process resulted in fine microstructure of material. Hardness improved with addition of WC from 396.3 ±10.5 HV for pure Inconel 625, to 469.9 ±24.9 HV for 30 weight % of WC. Tungsten carbide dissolved in Inconel 625 which allowed formation of intergranular eutectic that contains TCP phases.

【 授权许可】

Unknown