To improve the wear resistance of low-carbon steel and gray cast iron, TiC/Fe-type composite layers were fabricated using reactive casting coatings. The in situ synthesis reaction of titanium carbide (TiC) was initiated by the high temperature of the liquid alloy (SHS – self-propagating high-temperature synthesis). The structure, microstructure, hardness, and wear properties of the composite layers were investigated. Wear examinations were carried out in various environments: dry sliding, slurry abrasion, and cavitation erosion in slurry. An observation of the microstructure revealed the presence of TiC particles that were well-bonded with both types of matrices. The mechanical properties showed an almost three-fold increase in the hardness within the area of the composite layer as compared to the base alloy (1000HV1). These results were reflected in a slurry abrasion test that indicated less than half of the weight loss as compared to the monolithic matrix of the composite castings. The cavitation erosion wear mechanism of the composite layers was examined for the first time taking the surface of the sample into consideration (after polishing and as cast – casting skin). The polished surfaces were characterized by higher resistance to cavitation erosion than the as-cast samples. On the other hand, the casting skin acted beneficially as an extra coating that prevented the castings’ cores from cavitation erosion damage.

为了提高低碳钢和灰口铸铁的耐磨性，采用反应性铸造涂层制备了 TiC/Fe 型复合层。碳化钛 (TiC) 的原位合成反应由液态合金的高温引发（SHS——自蔓延高温合成）。研究了复合层的结构、显微组织、硬度和磨损性能。在各种环境中进行磨损检查：干滑动、浆料磨损和浆料中的气蚀。对微观结构的观察揭示了与两种类型的基体良好结合的 TiC 颗粒的存在。与基础合金 (1000HV1) 相比，机械性能显示复合层区域内的硬度几乎增加了三倍。这些结果反映在浆料磨损试验中，该试验表明与复合铸件的整体基体相比，重量损失不到一半。首次考虑样品表面（抛光后和铸件-铸件表皮）对复合层的空蚀磨损机理进行了研究。抛光表面的特点是比铸态样品具有更高的抗气蚀性。另一方面，铸件表皮作为额外的涂层起到了有益的作用，可以防止铸件的型芯受到气蚀损坏。首次考虑样品表面（抛光后和铸件-铸件表皮）对复合层的空蚀磨损机理进行了研究。抛光表面的特点是比铸态样品具有更高的抗气蚀性。另一方面，铸件表皮作为额外的涂层起到了有益的作用，可以防止铸件的型芯受到气蚀损坏。首次考虑样品表面（抛光后和铸件-铸件表皮）对复合层的空蚀磨损机理进行了研究。抛光表面的特点是比铸态样品具有更高的抗气蚀性。另一方面，铸件表皮作为额外的涂层起到了有益的作用，可以防止铸件的型芯受到气蚀损坏。