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Subject: Re: problem
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Date: 12/10/02 at 10:51 PM
Posted by: aguinaldo gonsalez
In Reply to: problem posted by suresh mallya on 08/18/02 at 9:13 AM:
Dear Mr. Suresh
My practice for deoxidation for CN7M is 4 kgs Calcium silicio for 1 ton material
I put in a ladle.
The relation betwen Mn and Si is very important to avoid the porosity in the solidification.
My practice is MN/SI = 0.85 max.
Pouring temperature is dependent to the thickness of the piece.
I use 1590 C for 15 mm thickness.
Very high temperature causes hot tears.
The pouring should be more continous as possible, and donīt have interruption in the stream , because can produce a cold laps.
Eng. Aguinaldo Gonsalez
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