Enhancement of pearlite transformation by Warm Rolling in 1.0C-1.5Cr Steel

Abstract

Isothermal and non-isothermal pearlite transformations under 840°C warm-rolled and 950°C hot-rolled were researched. It was found that the pearlite nuclei at grain boundary and defects were increased by warm deformation. The results showed that the incubation time was shortened in the isothermal pearlite transformation and the volume fraction of pearlite was increased in continuous cooling condition by warm deformation. The pearlite transformation behaviour under continuous cooling condition was predicted by the formula of Umemoto. The critical cooling rates of the fully pearlite structures formed under warm deformation condition and hot deformation condition were calculated.

KEYWORDS:

• Pearlite transformation
• warm rolling
• intragranular nucleation
• critical cooling rate

Acknowledgements

This work was supported by the National Key R&D Program of China [grant number 2017YFB0304201].

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Key R&D Program of China [grant number 2017YFB0304201].