Effect of cooling rate on the M-A constituents and toughness in normalized 10MnNiCr steel for ship hull

suhang

Iron and Steel ›› 2010, Vol. 45 ›› Issue (9) : 72-72.

Welcome to visit Iron and Steel, July 26, 2025
Iron and Steel ›› 2010, Vol. 45 ›› Issue (9) : 72-72.
钢铁材料

Effect of cooling rate on the M-A constituents and toughness in normalized 10MnNiCr steel for ship hull

Author information +
History +

Abstract

The effect of cooling rate on the M-A constituents and mechanical properties in normalized 10MnNiCr steel was investigated using Gleeble simulation, microstructure observation and hardness and impact energy measurement. The results indicate that the island-like M-A constituents formed in the steel after normalization in an extensive range of cooling rate from 0.167 to 15o C/s. With the cooling rated increased, the polygonal ferrite as the matrix neighboring to the islands was replaced gradually by bainitic ferrite. This resulted in the morphological variation of island from large massive to small elongated ones. The improvement of impact toughness could be attributed to the decrease of microhardenss in M-A constituents and refinement of matrix phase as the cooling rate increased.

Key words

HSLA steels / Continuous cooling transformation / M-A constituents / Mechanical properties

Cite this article

Download Citations
suhang Effect of cooling rate on the M-A constituents and toughness in normalized 10MnNiCr steel for ship hull[J]. Iron and Steel, 2010, 45(9): 72-72

7

Accesses

0

Citation

Detail

Sections
Recommended

/