Conclusions
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1.
A study was made of the process of paraffin-wax removal from blanks produced by extrusion. It was established that about 20% of the paraffin wax present is removed below 100°C, about 30% from 100 to 200°C, and 50% from 200 to 300°C. Complete wax removal occurs at 300°C. With increasing blank diameter, the time required for the full removal of paraffin wax increases, particularly in the temperature range 100–300°C.
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2.
In choosing temperature conditions for the wax removal operation, it is necessary to take into account the properties of the packing material employed and the size of the parts, preference being given to finely divided packing materials, since these possess the greatest adsorptive capacity.
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3.
On the basis of this investigation temperature conditions have been proposed for the presintering of die-extruded parts from hard-alloy mixtures.
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Translated from Poroshkovaya Metallurigiya, No. 5(89), pp. 50–54, May, 1970.
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Plyushch, G.V., Pryadka, G.A. Removal of plasticizek from hard-alloy blanks. Powder Metall Met Ceram 9, 392–395 (1970). https://doi.org/10.1007/BF00796507
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DOI: https://doi.org/10.1007/BF00796507