Analysis on microstructure and wear resistance of TiC particles reinforced 1Cr12Ni3Mo2V matrix composites processed by laser stereo forming

Based on the laser stereo forming technology, the 1Cr12Ni3Mo2V matrix composite specimens with different TiC particles (volume fraction of 0%, 10% and 20%) have been made by controlling the iron-base powder and TiC powder feeding rate. The phase analyses have been carried out based on the specimens with different TiC particles. And the microstructure of each specimen has been analysed and compared. The formation mechanism has been discussed, and the hardness of different specimens has been tested, and then the friction and wear properties of each specimen have been analysed. The results show that TiC particles and 1Cr12Ni3Mo2V stainless steel are well combined by the laser stereo forming technology. TiC exists mainly in two ways, one is TiC which is not completely decomposed, and the other is TiC which is newly precipitated. Compared to 0% and 10% TiC, 20% TiC has better hardness and wear resistance. The main occurrence of 0% TiC is abrasive wear and adhesive wear, while 1Cr12Ni3Mo2V composites of 10% TiC and 20% TiC particles are mainly adhesive wear and oxidative wear.