The influence of working distance on laser deposited WC-Co

被引：42

作者：

Xiong, Yuhong ^{[1
]}

Smugeresky, John E. ^{[2
]}

Schoenung, Julie M. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[2] Sandia Natl Labs, Livermore, CA 94551 USA

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2009年 / 209卷 / 10期

基金：

美国国家科学基金会; 美国能源部;

关键词：

WC-Co; Laser Engineered Net Shaping; Microstructure; Working distance; DIRECT METAL-DEPOSITION; FABRICATION; COMPOSITES; COMPONENTS; POWDER; LENS;

D O I：

10.1016/j.jmatprotec.2009.01.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanostructured WC-10wt.% Co powder was used to make thick wall samples by the Laser Engineered Net Shaping (LENS (R)) process. During this process, a Nd:YAG laser was applied to create a molten pool on a stainless steel substrate and to deposit WC-Co into bulk cermets, the shape of which was controlled by a pre-programmed computer-aided design (CAD) model. Microstructure characteristics were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that working distance and relative location of the focal plane of the laser beam play an important role in controlling sample microstructures, in addition to other common process parameters such as laser power, traverse speed and powder feed rate. Thermal behavior leading to the observed microstructures that result from the variations in working distance was also investigated in this work. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：4935 / 4941

页数：7

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