Fabrication of TiC and TiB2 locally reinforced steel matrix composites using a Fe–Ti–B4C–C system by an SHS-casting route
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Steel matrix composites locally reinforced by in situ TiC and TiB2 particulates were successfully fabricated using self-propagating high-temperature synthesis (SHS) in a Fe–Ti–B4C–C system during casting. The locally reinforced steel matrix composites consist of three distinct regions: (i) a TiC and TiB2 particulate-reinforced region, (ii) a transition region, and (iii) a steel matrix region. The TiC and TiB2 particulates in the locally reinforced regions display a relatively uniform distribution, and their sizes decrease with the increase in Fe content from 10 wt.% to 40 wt.%. The wear resistance of the locally reinforced region of the steel matrix composites is much higher than that of the unreinforced steel matrix.
KeywordsWear Surface Molten Steel Adiabatic Temperature Sand Mould Steel Matrix
This work is supported by The National Natural Science Foundation of China (no.50531030) and The Ministry of Science and Technology of the P.R. China (no. 2005CCA00300) as well as The Project 985-Automotive Engineering of Jilin University.
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