材料工程Issue(11)：6-11,6.
脉冲等离子弧快速成形Inconel 625组织性能研究
Microstructure and Mechanical Properties of Inconel 625 Components Deposited by Pulsed Plasma Arc Rapid Prototyping
摘要
Abstract
The microstructure and mechanical properties of Inconel 625 component deposited by pulsed plasma arc rapid prototyping were investigated. The precipitation principle and distribution characteristics of phases in deposits were analyzed. The results indicated that the as-deposited samples exhibited homogenous cellular dendrite structure in nature, which grew epitaxially along the deposition direction. The microstructure of the interface regions between deposited layers exhibited refined structure. The composition distribution in the whole sample was pretty uniform and no significant segregation occurred. Some intermetallic phases such as Laves phase, some minor MC (NbC, TiC) and needle-like δ (Ni3Nb) were observed in y-Ni matrix. Disperse MC particles precipitates in interdendritic and grain boundary. Micro-hardness measured at various location (including transverse plane and longitudinal plane) revealed hardness in the range of 260-285HV0.2. Due to highly refined structure,micro-hardness at the interface region is slightly higher than the other regions. Ultimate tensile strength of Inconel 625 sample deposited as short raster pattern was found to be 750MPa, and the percentage elongation was found to be 50%.关键词
脉冲等离子弧快速成形/Inconel 625/组织特征/力学性能Key words
pulsed plasma arc rapid prototyping/Inconel 625 /microstructure/mechanical property分类
矿业与冶金引用本文复制引用
徐富家,吕耀辉,刘玉欣,何鹏,舒凤远,徐滨士..脉冲等离子弧快速成形Inconel 625组织性能研究[J].材料工程,2012,(11):6-11,6.基金项目
国家973项目(2011CB013403) （2011CB013403）
国家科技支撑项目(2011BAF11 B07,2011BAC10B05) （2011BAF11 B07,2011BAC10B05）
