Research on the TiC Reinforced Steel Matrix Surface Composites Prepared by SHS Casting

Abstract

In this paper, TiC reinforced steel matrix surface composites were prepared by vacuum evaporative casting infiltration process and self-propagating high-temperature synthesis. The effect of original composition, binder types and original coating density on the hardness, wear resistance and microstructure of the coating were also studied. The results showed that the Ti and C content was 80% while added 3% PVA, by pressed at 200MPa pressure leading optimal coating quality. Meanwhile the average hardness was 48HRC and the wear rate was 40%.

Production of TiC-MMCs Reinforcements in Cast Ferrous Alloys Using In Situ Methods

“…Many types of powders can be processed by SHS but much of the research on MMCs fabricated using this technique has been focused on the following systems: Ti-C [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ], Ni-Ti-C [ 58 , 59 ], Ni-Ti-B 4 C [ 38 , 60 , 61 ], Fe-Ti-C/Fe-Cr-Ti-C [ 7 , 10 , 20 , 22 , 24 , 48 , 54 , 62 ], Cu-Ti-B 4 C [ 6 , 26 , 41 , 42 , 63 ], Al-Ti-C [ 43 , 64 ] and Al-Ti-B 4 C [ 44 , 65 ]. The studies carried out have contributed to the understanding of the effect of key factors, such as particle size, compaction pressure, and casting temperature on the final microstructure and mechanical properties of the MMCs.…”

“…As evident from the literature review, the first cases of SHS application on cast ferrous alloys are from 2005, and the majority of the applications were developed in steel parts [ 6 , 20 , 22 , 44 , 48 , 58 ], using a pressureless infiltration technique, which is less frequent in cast iron components [ 24 , 53 , 54 , 64 ]. The main findings on using the most common powder systems will be presented in the following five sections.…”

“…The production of the reinforcement uses a simple methodology based on the formation of local metal matrix composites (MMCs) with ceramic particles. Two different approaches can be used: the so-called ex situ, where the ceramic particles are previously produced with the desired shape and introduced in the mold cavity before metal casting [ 5 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], and the in situ approach that uses a mixture of metallic and non-metallic powders previously compacted and then inserted in the mold, where they react together through combustion reactions due to the effect of the liquid metal temperature and, consequently, produce the composite reinforcement [ 9 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Microstructural Characterization of TiC–White Cast-Iron Composites Fabricated by In Situ Technique

“…In situ and ex situ methods could be applied to fabricate the composite reinforcement [10][11][12]. In the ex situ methods, the ceramic is previously produced with the required shape and then inserted into the mold [11,[13][14][15][16][17][18][19][20][21][22], while in situ methods aim to produce the ceramic particles through the combustion reaction of the powder compacts inserted in the mold cavity [23][24][25][26][27][28].…”

“…Regarding the technology, investigations were focused on the CS of several powder systems, such as Ti-C [30,[36][37][38][39][40], Ni-Ti-C [41,42], Ni-Ti-B 4 C [31], Fe-Ti-C/Fe-Cr-Ti-C [10,[23][24][25]43,44], Cu-Ti-B 4 C [45][46][47], and Al-Ti-B 4 C [12,48]. Some of them were applied to the reinforcement of steel parts [12,24,25,42,43,45] and very few to the reinforcement of iron components [23,[38][39][40].…”