Improving impact toughness of high-C–Cr bearing steel by Si–Mo alloying and low-temperature austempering. (5th December 2015)

• Record Type: Journal Article
• Authors: Zhao, J.; Zhao, T.; Hou, C.S.; Zhang, F.C.; Wang, T.S.
• Is Part Of: Materials & design. Volume 86(2016:Oct.)
• Page Start: 215
• Page End: 220
• Publication Date: 2015-12-05
• Subjects: Austempering -- Steels -- Hardness -- Impact behavior -- Nanostructured bainite; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.07.055
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Nanostructured bainite and dispersed carbide particles were formed in Si–Mo-alloyed high-C–Cr bearing steels by low-temperature austempering after partial austenitizing in the intercritical gamma + carbide region. Comparing with conventional quenched and tempered high-C–Cr bearing steel, the impact toughness is remarkably enhanced; the hardness is still adequate for the bearings even though it is slightly decreased. Graphical abstract: Highlights: High-C–Cr bearing steel was alloyed by adding Si and Mo. Si–Mo-alloyed bearing steels were austempered at low temperatures. Nanostructured bainite and dispersed carbide particles are obtained. Adequate hardness and markedly enhanced impact toughness are achieved.