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Subject: heat treatment of high chrome irons

Date: 07/28/00 at 9:32 PM
Posted by: Dr Arun Rao
E-mail: kasc@satyam.net.in
Message Posted:

we are manufacturing high chrome liner plates used as liner plates in tube mills for grinding clinker.
the nominal composition of the alloy being processed is C 2.4%, Cr 24%. these are then tempered at 450 celsius to maintain a hardness of 450BHN.
we have been supplying these to smaller diameter mills upto 2.2metre dia. it is now proposed to use these in large dia mill of 4.0 metre. my question is will the above mentioned heat treatment practice suffice.?

this is more related to design than metallurgy. tube mill was lined with high manganese steel
liner plates it is now proposed to convert on a one to onebasis the liner plate material from high manganese steel to high chrome iron. will any modifications be necessary like removing stress raisers in the form of thin sections, key hole for locking t he bolt etc.
In short is there any guideline or a high chrome liner practice?

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