Melting of multipass surface tracks in steel incorporating titanium carbide powders. (August 2015)

• Record Type: Journal Article
• Authors: Mridha, S.; Md Idriss, A. N.; Maleque, M. A.; Yaacob, I. I.; Baker, T. N.
• Is Part Of: Materials science and technology. Volume 31:Number 11(2015:Nov.)
• Page Start: 1362
• Page End: 1369
• Publication Date: 2015-08
• Subjects: Steel, -- Welding torch melting, -- Composite coating, -- Overlapping, -- Microstructure, -- Hardness; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284714Y.0000000712
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Overlapping tracks were processed by melting preplaced titanium carbide (TiC) powder on steel surfaces using a tungsten inert gas torch. The tracks produced ∼1·0 mm melt depth free from cracks, but occasional pores were observed. The microstructure consisted of unmelted and partially melted TiC particulates together with reprecipitated TiC particles, which were prominent in tracks processed in the initial stage. A greater number of reprecipitated globular and cubic TiC particles were observed in tracks processed in the later stages, indicating more dissolution of TiC particulates from the overlapping operation. Those multitracks processed in the initial stage developed a maximum hardness of 850–1000 HV, which was lower in most other tracks, although comparable hardness values were recorded in the last track.