Influence of tungsten on microstructure and wear resistance of iron base hardfacing alloy. (March 2014)

• Record Type: Journal Article
• Authors: Liu, D. S.; Liu, R. P.; Wei, Y. H.
• Is Part Of: Materials science and technology. Volume 30:Number 3(2014:Mar.)
• Page Start: 316
• Page End: 322
• Publication Date: 2014-03
• Subjects: Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284713Y.0000000359
• Languages: English
• ISSNs: 0267-0836

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <sec> <p>A series of iron based hardfacing alloys with varying tungsten contents were fabricated using slag free self-shielded flux cored wire, and the effects of tungsten addition on microstructure and wear performance were investigated. The experimental results showed that the iron base tungsten free hardfacing alloy has a typical hypereutectic microstructure, which consists of primary hexagonal M₇(C, B)₃ carbides and eutectic long bar-like M₃(C, B) carbides in the austenite and martensite matrix. The addition of tungsten increases the size of primary hexagonal M₇(C, B)₃ carbides and promotes the formation of martensite, as well as changes the morphology of eutectic carbides. It was found that the eutectic carbides change from the long bar-like shape to the scattered web shape with the increase in tungsten content to 9 wt-%, and subsequently change to the plate shape with further increasing the tungsten content to 12 wt-%. For the all tungsten containing hardfacing alloys, tungsten exists in both the carbides and matrix uniformly. Results also showed that the wear loss of the sample with 9 wt-% tungsten was the smallest among all the samples owing to the higher hardness and reinforced microstructure.</p> </sec> </abstract>