摘要：Martensitic stainless steels (MSSs) are often used for applications that require high wear resistance and hardness. A laser multi-track overlapping process was employed to fabricate TiC-reinforced metal matrix composite (MMC) coatings on X12CrNiMo steel substrate using a 4.4 kW continuous wave (CW) Nd: YAG laser. 50 and 75% overlap were produced. Comparative studies of the three-body abrasive wear resistance of the MMCs and the native material were carried out. The composite microstructures consist of homogeneous distribution of TiC grainsand were free from cracks. Significant improvement in the hardness and wear resistance properties were obtained in the alloyed samples compared with the as-received MSS. The 75% overlap MMC has lower porosity, higher hardness and superior abrasive wear resistance than the 50% overlap.
