Epsilon carbide precipitation and wear behaviour of low alloy wear resistant steels. Issue 4 (3rd March 2016)

• Record Type: Journal Article
• Authors: Deng, X. T.; Fu, T. L.; Wang, Z. D.; Misra, R. D. K.; Wang, G. D.
• Is Part Of: Materials science and technology. Volume 32:Issue 4(2016)
• Page Start: 320
• Page End: 327
• Publication Date: 2016-03-03
• Subjects: Martensitic steel -- Epsilon carbides -- Mechanical property -- Three-body impact abrasive wear; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2015.1137410
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : In this study, we obtained different morphology and size of epsilon carbides ( ϵ -carbides) via low temperature tempering of 0.32 wt-% C low alloy wear resistance steel. The objective is to elucidate the determining role of size and morphology of carbides on mechanical properties and three-body impact wear resistance. The formation of small needle-like ϵ -carbides was responsible for increase in yield strength, low temperature impact toughness and three-body impact wear resistance. However, when the ϵ -carbides were large and rod-like, hardness, toughness and three-body impact wear resistance were significantly reduced. The wear mechanism of steel containing needle-like ϵ -carbides primarily involved plastic deformation associated with fatigue and small degree of abrasive wear and furrow, while steels containing rod-like ϵ -carbides were predominantly characterised by furrow.