Influence of the Steel Powder Type and Processing Parameters on the Debinding of PM Compacts with Gelatin Binder
Artikel i vetenskaplig tidskrift, 2014

Binders present an important part of the powder metallurgy technology as they are vital to provide efficient powder agglomeration and/or lubrication during shaping. At the same time, they have to be easily removed from the compacts during initial stages of sintering without any harmful effect for the base material, as well as for the environment. Therefore, behavior of gelatin as a binder for stainless- and tool-steel gas-atomised powder compacts was studied by thermal analysis and electron microscopy. Thermal analysis showed that peak mass-loss occurred in the range between 340 and 370 C, depending on the base powder and heating rate. Risk for base powder oxidation at temperatures below 425 C was detected. Based on the obtained results, it is recommended to perform debinding at *425 C after applying a heating rate of around 7.5 C min-1. Only in this way efficient enough binder removal can be obtained concurrently to avoiding base powder oxidation.

Interfaces

Polymers

Gelatin

Oxidation

Powder metallurgy

Sintered steel

Författare

Eduard Hryha

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Henrik Borgström

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Karin Sterky

Chalmers, Kemi- och bioteknik, Polymerteknologi

Lars Nyborg

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Journal of Thermal Analysis and Calorimetry

1388-6150 (ISSN) 1588-2926 (eISSN)

Vol. 118 2 695-704

Drivkrafter

Hållbar utveckling

Styrkeområden

Produktion

Materialvetenskap

Ämneskategorier

Materialkemi

Annan materialteknik

Metallurgi och metalliska material

DOI

10.1007/s10973-014-3839-7