用于滑动磨损条件下的耐磨热喷涂涂层既硬又脆 (如碳化物基和氧化物基的涂层 ) ,这使得它们在冲击载荷和对疲劳敏感的工况下没有使用价值。在极端冲蚀磨损条件下 (冲击截荷、高硬度磨粒和高速磨粒 ) ,复合涂层保证了硬度和韧性的优化结合。本文介绍了用爆炸喷涂、连续爆炸喷涂和喷涂熔化过程中沉积的碳化钨 -钴( WC- Co)系统和自熔性合金系统 ,它包括了以碳化钨 -钴为基础的硬金属粒子( Ni Cr Si B- ( WC- Co) ) ;研究了不同粉末的成分和工艺 ,并就涂层组织和磨损参数对涂层磨损性能的影响进行了评估 ;探讨了喷涂和熔融涂层与其硬度的关系 ,并提出了涂层选择的硬度标准。研究发现 ,与只含有 WC粒子的简单钴结构相比 ,WC- Co基硬金属或金属基质的复合材料涂层的“双金属陶瓷型”组织是更优化的结构。在此提出了涂层选择的准则。为帮助最终用户选择合理的喷涂工艺和材料 ,给出了耐磨性能和硬度关系的涂层选择图。本文还讨论了在对成本更敏感的应用场合下涂层的成本效益并提供了基于回收材料的复合涂层 Wear-resistant thermal spray coatings for sliding wear conditions are both hard and brittle, such as carbide-based and oxide-based coatings, making them of no value in impact loading and fatigue-sensitive conditions. In extreme erosion wear conditions (impact load, high hardness abrasive particles and high-speed abrasive particles), composite coating to ensure the optimal combination of hardness and toughness. This article describes tungsten carbide-cobalt (WC-Co) systems and self-fluxing alloy systems deposited by explosive spraying, continuous explosion spraying, and spray melting processes that include hard metal particles based on tungsten carbide-cobalt Cr Si B- (WC-Co)). The composition and process of different powders were studied. The influence of coating microstructure and wear parameters on the wear properties of the coating was also evaluated. The relationship between the sprayed and melted coatings and their hardness , And proposed the choice of coating hardness standards. The study found that the “bimetallic” structure of the WC-Co-based hard metal or metal matrix composite coating is a more optimized structure than the simple cobalt structure containing only WC particles. Here are the guidelines for coating selection. To help end-users choose the right coating process and materials, a selection chart of the coating’s wear resistance versus hardness is given. This article also discusses the cost-effectiveness of coatings in cost-sensitive applications and provides composite coatings based on recycled materials