文章基本信息

标题：Fabrication of Gear Having Functionally Graded Properties by Direct Laser Melting Process
本地全文：下载
作者：Sang-Wook Han ; Won-Jong Ji ; Young-Hoon Moon 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2014
卷号：2014
DOI：10.1155/2014/618464
出版社：Sage Publications Ltd.
摘要：Functionally graded properties are characterized by the variation in composition and structure gradually over volume, resulting in corresponding changes in the properties of the material. Direct laser melting (DLM) process is a kind of prototyping process whereby a 3D part is built layerwise by melting the metal powder with laser scanning. DLM can directly build full-density and high-performance complex metal parts from CAD solid model without using any molds and tools. The aim of the study is to demonstrate the possibility to produce functionally graded properties in gear through the direct laser melting of compositionally selected metallic powders. Properties of manufactured parts depend strongly on each single laser-melted track. Therefore, effects of the processing parameters such as scanning speed and laser power on single tracks formation are explored. For the fabrication of gear, building direction and hatch angle have been precisely controlled. Hardness test and EDX analysis were carried out on cross-section of fabricated gear to characterize functionally graded properties. From the analysis, functionally graded properties can be successfully obtained by DLM of selected metallic powders having different compositions.