Metal injection moulding of thin-walled titanium parts for medical applications

被引:7
作者
Friederici, Vera [1 ]
Ellerhorst, Martin
Imgrund, Philipp [1 ]
Kraemer, Steffen
Ludwig, Norbert
机构
[1] Fraunhofer Inst Mfg & Adv Mat IFAM, D-28359 Bremen, Germany
关键词
POROSITY;
D O I
10.1179/0032589914Z.000000000154
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Metal injection moulding (MIM) is an established technique for serial production of complex, mostly stainless steel parts. However, for other materials, especially for titanium parts, there is still the need for superior purity and enhanced surface quality. This paper describes recent advances at Fraunhofer IFAM to address the challenge of producing fit-for-purpose titanium MIM medical parts. Investigations have shown the effect of using very fine powders and mould surface finish: with polished moulds a very low surface roughness <0.8 mu m, was obtainable on the sintered part. Chemical and mechanical properties of the sintered parts are determined by complex interactions between sintering conditions, purity, particle size and binder components. Tests on the feasibility of moulding high aspect ratios, wall thicknesses <200 mu m and special features such as a fine internal threads and hexagon headset structures are also reported.
引用
收藏
页码:5 / 8
页数:4
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