Superior low temperature toughness in a newly designed low Mn and low Ni high strength steel

摘要

In this study, a low cost 2.5Mn-1.5Ni low carbon steel with a superior low temperature toughness (A_(kv) at -140 °C: 210 J) is developed, due to the formation of highly stable, nano-sized, and film-like retained austenite along the martensitic lath boundaries by using Quenching-Lamellarization-Tempering (QLT) process.