Modification of thermally sprayed cemented carbide layer by friction stir processing

SURFACE & COATINGS TECHNOLOGY

卷:204

Article

Morisada, Yoshiaki¹  Fujii, Hidetoshi²  Nagaoka, Toru¹  Fukusumi, Masao¹ 

[1] Osaka Municipal Tech Res Inst, Osaka 5368553, Japan

[2] Osaka Univ, Joining & Welding Res Inst, Suita, Osaka 565, Japan

关键词: Friction stir processing;    Cemented carbide;    Tool steel;    Thermal spray;    Hardness;   

DOI  :  10.1016/j.surfcoat.2010.01.021

来源: Elsevier

【 摘 要 】

The modification of a thermally sprayed cemented carbide (WC-CrC-Ni) layer by friction stir processing (FSP) was studied. The cemented carbide layer was successfully modified using a sintered cemented carbide (WC-Co) tool. The defects in the cemented carbide layer disappeared and the hardness of the cemented carbide layer increased to similar to 2000 HV, which was about 1.5 times higher than that of the as-sprayed cemented carbide layer. Additionally, the cemented carbide layer was bonded to the SKD61 (Nominal composition: 0.35-0.42 mass% C. 0.8-1.2 mass% Si, 0.25-0.5 mass% Mn, 4.8-5.5 mass% Cr, 1.0-1.5 mass% Mo, 0.8-1.2 mass% V. balance Fe) substrate by diffusion of the metallic elements and the distortion of the coating-substrate interface producing a mechanical interlocking effect. (C) 2010 Elsevier B.V. All rights reserved.

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