Microstructure and Wear Behavior of Brazed Ultrafine-Polycrystalline cBN with Cu-Sn-Ti Filler Alloy

Abstract:

Cu-Sn-Ti filler alloy was applied as brazing material to join UcBN grains onto the steel matrix using three different brazing temperatures (880, 900 and 920°C). The microstructure and properties of the UcBN-filler-steel joint and the compressive strength of UcBN grains were investigated respectively by means of scanning electron microscopy and energy dispersive X-ray spectroscopy and compressive test. The microstructural studies revealed an intermetallic interlayer of type TiN, TiB and TiB₂ at the joint interface, which grew with increasing brazing temperatures. The compressive force of UcBN grains with a maximum value of 79.3N was found when the brazing temperature was 900°C for 8 min. The wear process of brazed UcBN grains was a process transforming from abrasion wear to micro fracture mutually.

• Periodical: Advanced Materials Research (Volumes 753-755)
• Pages: 353-357
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.753-755.353
• Online since: August 2013
• Authors: Jian He*, Wen Feng Ding, Yan Wang, Zhi Wu Liu
• Keywords: Brazing, Interfacial Microstructure, UcBN-Filer-Steel Joint, Wear Behavior

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