长期以来,人们比较注重于用合金化的方法来提高铸件的耐磨性能。例如,在钢和铸铁中加入钨、铬、钼、锰等合金元素,形成钨系、铬系、锰系或多种元素强化的耐磨铸铁。近来人们发现,要提高磨料磨损条件下工件的服役性能,往往只需在铸件表面上获得一定厚度的耐磨复合层,无需提高整个铸件的耐磨性能就可以了,且铸件整体合金强化往往难以实现零件表面坚硬、心部有足够韧性的要求。所以高耐磨性复合铸件的生产势必引起世界各国有关 For a long time, people pay more attention to using alloying methods to improve the wear resistance of castings. For example, tungsten, chromium, molybdenum, manganese and other alloying elements are added to steel and cast iron to form tungsten-based, chromium-based, manganese-based or multi-element-reinforced wear-resistant cast iron. Recently, it has been found that to improve serviceability of workpieces under abrasive wear conditions, it is often only necessary to obtain a certain thickness of the wear resistant composite layer on the surface of the castings, without increasing the wear resistance of the entire castings, and it is often difficult to reinforce the overall castings To achieve the hard surface of the part, the heart has enough toughness requirements. Therefore, the production of high wear resistance composite castings is bound to cause all the countries in the world