We have found GPIL to be an excellent choice for steels where chipping and cracking have not been a problem. It has worked well in applications on thinner ...
Alloy steel forged BUR are made from special quality steel manufactured from quality raw material & ferroalloys through secondary refining& ingot pouring. The ingots are hot forged and dehydrogenation treatment is carried out. Forged blanks are procured and going through stringent quality inspection in macro & micro aspects and then processed successive stages of heat treatment like homogenizing, normalizing to improve the overall structural soundness, stress distribution uniformity & toughness. It undergoes differential hardening process followed by mist quenching or compressed air quenching depending on the hardness requirement upto a desired depth on barrel surface only.The tempered roll exhibits a uniform bainitic microstructure at the shell & fine pearlitic structure at the core /neck .
Due to the differential hardening the barrel / working area up to a critical depth only reaches to critical temperature & hence hardened. The rest core & neck remains unaffected resulting higher impact strength as well as strength against overload during the rolling
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