Structure and mechanical properties of hot-deformed low-carbon martensitic steel

• Published in: Russian metallurgy Metally Vol. 2016; no. 3; pp. 174 - 180
• Main Authors: Romanov, I. D., Shatsov, A. A., Zakirova, M. G., Berezin, S. K.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2016; Springer Nature B.V
• Subjects: Chemistry and Materials Science; High strength; Impact strength; Martensite; Martensitic stainless steels; Materials Science; Mathematical analysis; Mechanical properties; Metallic Materials; Structural members; Structural steels
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029516030113

The structural changes in low-carbon martensitic 15Kh2G2NMFBA steel induced by its hot forging in the temperature range 1150–850°C have been studied. The calculated cracking resistance parameter
I
c
is in agreement with its experimental value. A relation is found between the lath sizes in the martensite structure and the change in the impact toughness characteristics. A combined regime of hot deformation and hot treatment of the low-carbon martensitic steel is proposed to form submicrometer-sized structural elements and high strength and impact toughness characteristics.