Edge Check for high Ni grades
Edge Check for high Ni grades
(OP)
when the hot rolling temeprature is too low, there will have edge check issues. what could be the reason(s) of edge check when the hot rolling temperature is too high? (starting tem about 2400F, reducing atmosphere furnaces). How to prevent edge checks during hot/cold rolling?





RE: Edge Check for high Ni grades
Original edge condition is critical to minimize checking.
For some low ductility alloys the edges are trimmed multiple times during the cold rolling process (many passes).
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Plymouth Tube
RE: Edge Check for high Ni grades
Maybe severe oxidation, since hot rolling occurred in air? the machine doesnot have enough power to roll at 2200-2300F.
RE: Edge Check for high Ni grades
RE: Edge Check for high Ni grades
General speaking ,temperature of 2400 F for most kind of Ni-alloy is exagerated and close to melting (2550-2600 ). At first plastic deformation at/ or high strain rate , de-coesion will happen due to oveheating: not only slivers at corners but also burst in centre of billet.
In case of ASS, temperature 2300 F is still enough high. Slivers may depend on Ferrite% or low melting elements( as Pb,Sb,Sn and so on )
Therefore, which grade is involved ?
RE: Edge Check for high Ni grades
They make edge checking look like child's play.
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Plymouth Tube
RE: Edge Check for high Ni grades