For a good wire drawing practise it is recomended to look for a patenting structure of 85% fine perlite and 15 % coarse or medium resolvable perlite.
It is convenient to have the temperatures of the furnace constant and adjust speed accordingly to the obtained structures.
Common temperatures are (+ -) 1000 oC on the furnace and 500 oC on the lead . It is convenient to keep the first zones on 1000 oC , the soaking or stabilizing zones can be at lower temperatures. The reducing and presure atmospher on furnace is very import to avoid lead drag out.
Eduardo Anaya Senior Consultant INDEPA S.C. Mexico City Tel(011-52)555-407-7451
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