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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2008

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Development of a feedstock formulation based on PP for MIM of carbides reinforced M2

Matula G., Dobrzański L., Várez A., Levenfeld B.

Journal of Achievements in Materials and Manufacturing Engineering

2008

Vol. 27, nr 2

195-198

Purpose: Influence of binder composition on some selected properties of feedstock contained powder of M2 with 10% of carbides powders are demonstrated in the paper. Design/methodology/approach: Torque-load test, rheological tests. Findings: Examination of the effect of the binder type and portion on structure and properties of the experimental tool materials with the cermets structure revealed that using the stearic acid reduces viscosity, thus improving technological properties of the feedstock. Employment of polyethylene instead of the high density polypropylene reduces viscosity and torque-load of the investigated feedstocks. Therefore, there is a possibility to increase the portion of the metallic or ceramic powder. Practical implications: It is expected that further investigations of these materials will make possible their injection moulding, as well as their heat treatment increasing hardness and strength of matrix and thereby of the whole tool material. The extrusion process or PIM (Powder Injection Moulding) gives the possibility to manufacturing tools materials on the basis of high speed-steel which characterised very good properties with their final or near net shape. Originality/value: In the paper the using extruding of the polymer-powder mix gives the possibility to fabricate cermets which, with their structure and mechanical properties, fill the gap in tool materials between the high-speed steels and cemented carbides.