This paper introduces the wear-resistant coating for locomotive bearing forgings and its preparation technology, including the selection of coating materials, preparation technology and performance test. Wear-resistant coating can improve the wear resistance and fatigue resistance of bearing forgings, extend their service life, and improve the operating efficiency and safety of locomotives.
Locomotive bearing forging is the key part of locomotive and rolling stock, which needs to bear large load and friction force. In order to improve the wear resistance and fatigue resistance of bearing forgings, wear-resistant coating can be prepared. The wear-resistant coating has the advantages of high hardness, low friction coefficient and good thermal stability, which can extend the service life of bearing forgings and improve the operating efficiency and safety of locomotives.
The material suitable for wear-resistant coating should have the characteristics of high hardness, low friction coefficient and good thermal stability. Commonly used wear-resistant coating materials include cermet, tungsten carbide, titanium nitride and so on. These materials have high hardness and good thermal stability, which can effectively improve the wear resistance and fatigue resistance of bearing forgings.
There are many kinds of preparation processes for wear-resistant coatings, including physical vapor deposition, chemical vapor deposition, spraying, etc. Among them, physical vapor deposition and chemical vapor deposition technology can prepare high quality wear-resistant coatings, but the equipment cost is high. The spraying technology has the advantages of low equipment cost and easy operation, but the coating quality is relatively low. The selection of the appropriate preparation process needs comprehensive consideration according to the specific situation.
In order to evaluate the performance of wear-resistant coatings, it is necessary to conduct hardness test, friction coefficient test, fatigue resistance test and so on. The hardness test can evaluate the hardness level of the coating, the friction coefficient test can evaluate the anti-friction performance of the coating, and the anti-fatigue performance test can evaluate the effect of the coating on improving the life of the bearing forging.
Wear-resistant coating can improve the wear resistance and fatigue resistance of locomotive bearing forgings, prolong its service life, and improve the operating efficiency and safety of locomotive. The selection of suitable wear-resistant coating materials and preparation process is the key, which needs comprehensive consideration. At the same time, the performance test of the coating is also necessary to ensure the quality and reliability of the coating.
