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1 Zeszyty Naukowe. Mechanika / Politechnika Opolska

1 2007

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Influence of cooling rate on microstructure of a NB-V HSLA steel

Legerski M., Schindler I., Suchánek P.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2007

Vol. 321, z. 89

115-116

In most cases an effort is made to combine controlled rolling of the microalloyed steel with its accelerated cooling, which has a favourable influence mainly on size of the resulting ferritic grain. In practice an opposite case may sometimes happen, where even slowed down cooling of final rolled products occurs. For example, after rolling of universal mill plates in a three-high mill the rolled products are not water-sprayed but they cool from the finish rolling temperature in collection pits, where accumulation of a larger quantity of the hot material strongly reduces speed of cooling down the material, compared also with free cooling in the air. In laboratory experiments mentioned below a simplified simulation of controlled finish rolling and slowed down cooling of such universal mill plates was carried out.