Effect of C particle size on the porous formation of TiC particulate locally reinforced steel matrix composites via the SHS reaction of Ni–Ti–C system during casting

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

“…Titanium carbide, as a strengthening phase is characterised by a high: hardness from 3000 to 3200 HV, melting temperature 3067 °C, thermodynamic stability and a relatively good wettability in Fe base alloy [16][17][18].…”

In Situ TiC/TiB2 Particulate Locally Reinforced Steel Matrix Composites Fabricated Via the SHS Reaction of Ni–Ti–B4C System

“…In order to simplify the process of the solidification, the following assumptions are considered: (1) there is no gap between the steel melt and sand mold; (2) the physical properties of the steel melt and sand mold are independent of temperature; (3) there is no heat loss between the mold and environment; (4) the heat transfer depends on heat conduction. Firstly, without the consideration of the heat released from reacting performs, the solidification time of the pure steel melt in the current experiment can be estimated as t s =62.9 s using the same estimation method in the literature, 19 and the cooling rate of the steel melt were 2.35°C/s according to these parameters, 23,24 which will be used to conveniently calculate the actual solidification time of steel melt with consideration of the heat conduction between steel and reacting perform. Actually, compared with the solidification time of steel melt without the reacted perform, the heat released from the combustion synthesis of Ni–Ti–B 4 C system would delay the solidification time of the steel due to the exothermic reaction occurred during the solidification.…”

“…However, it may lower the wear resistance properties of the local reinforcing region. We have fabricated the dense locally reinforced steel matrix composites with high volume fraction of TiC particulate by decreasing the C particle size in the Ni–Ti–C system during casting 19 . However, compared with the monolithic constituent TiC as reinforced phase, TiC/TiB 2 offers enhanced fracture toughness and higher wear resistance.…”

Effect of Cu content on the reaction behaviors of self-propagating high-temperature synthesis in Cu–Ti–B4C system

“…More details about the experimental apparatus and procedure for the SHS reaction were given in a previous article [17]. It is worth noting that the current in the present experiment is selected as 90 A.…”

“…The addition of metal with low melting point decreases the reaction temperature by forming a liquid at a low temperature and improves the surface reaction rate. The effects of the addition of metals such as Al and Ni to the Ti-B 4 C mixtures on the SHS reaction behavior and mechanism have has been investigated by many researchers [16,17]. For instance, the addition of Al to the Ti-B 4 C reactants facilitates the ignition occurrence, lowers the reaction exothermicity and modifies the resultant microstructure [16].…”