Solvent debinding variables on leaching fat, oil and grease (FOG) derivatives of green part stainless steel SS316L metal injection moulding

摘要

Sewage fat or Fat Oil Grease (FOG) derivatives forbinder’s component in the stainless steel SS316L feedstock beinginjected and undergo several test debinding variables. Theinfluences of temperature, time and solvents type has been testedwith binder formulation of 60:40 between Polypropylene (PP) andFOG derivatives besides the 60% powder loading of stainless steelpowder. Experimental results of the quickest and higherpercentage of FOG derivatives leach out from green part is beinganalysed. The green part will undergo two different solventdebinding (Heptane and Hexane) with three different solventtemperature. Debinding times was set for 10 hours and every 1, 3,6 and 10 hours the green part will undergo weight measurementfor monitoring the weight loss percentage of green part. It seemsthat both solvent indicates good diffusion and dilution forextracting the FOG derivatives out from the green part inproducing brown part where no sign of part crack or swellingduring and after solvent debinding. Energy DispersiveSpectrometer (EDS) for element detection and Scanning ElectronMicroscope (SEM) analysis also being perform which indicates thegood pores build up. Results found that the best solvent forremoving FOG derivatives is hexane with 60oC being the choice ofsolvent temperature.