Comparative study on microstructures and properties of Mn-containing and Mn-free bainitic steels. Issue 4 (3rd March 2020)

• Record Type: Journal Article
• Authors: Long, Xiaoyan; Zhang, Ruijie; Zhang, Fucheng; Zhang, Ming
• Is Part Of: Materials science and technology. Volume 36:Issue 4(2020)
• Page Start: 460
• Page End: 467
• Publication Date: 2020-03-03
• Subjects: Bainitic steel -- Mn content -- microstructure -- impact-abrasion wear resistance; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2019.1710921
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: The effects of Mn on the microstructure and impact-abrasion wear resistance of bainitic steel were studied. Results showed that the Mn-containing steel possessed finer microstructure and higher volume fraction of retained austenite, in comparison with the Mn-free steel. This was caused by lower transformation temperature and higher strength of undercooled austenite. The weight loss of Mn-free steel varying with the impact load was larger than that of Mn-containing steel. High strength, hardness and toughness of Mn-containing steel were conducive to improving wear resistance. More retained austenite in Mn-containing steel played an active role in work hardening and hindering crack propagation. However, the portion of retained austenite that induced martensitic transformation was the same with increasing impact-wear load.