Improvement of rheological properties of Inconel 718 MIM feedstock using tailored particle size distributions

被引：24

作者：

Contreras, Jose M. ^{[1
]}

Jimenez-Morales, Antonia ^{[1
]}

Torralba, Jose M. ^{[1
]}

机构：

[1] Univ Carlos III Madrid, Dept Mat Sci & Engn, Madrid 28911, Spain

来源：

POWDER METALLURGY | 2008年 / 51卷 / 02期

关键词：

Feedstocks;

D O I：

10.1179/174329008X313342

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

One of the most important stages in the metal injection moulding (MIM) process is feedstock fabrication, since the rheological properties of the feedstock are of crucial importance in the injection moulding step. In the present work, the possibility of replacing a conventional MIM superalloy feedstock (particle size < 20 mu m) by a mixture of powders with different particle size ranges, to tailor the flow properties, was investigated. Five Inconel 718 feedstocks were prepared with the same binder (HDPE-paraffin wax-stearic acid) and different mixes of four spherical gas atomised powder fractions (<22; 16-45; 45-63; 65-212 mu m). The rheological characteristics and processability of each feedstock were evaluated with a capillary rheometer to determine flow index, yield stress and activation energy.

引用

页码：103 / 106

页数：4