Wear And Galling Resistance Chart Of Material Combinations
Wear and galling are two common issues that engineers face when designing mechanical systems. Wear is the gradual loss of material due to friction, while galling is a form of wear that occurs when two surfaces rub together and stick, causing material to transfer from one surface to the other. To prevent wear and galling, engineers often use materials with high wear and galling resistance. The wear and galling resistance chart provides engineers with a useful tool for selecting the right material combinations for their specific application.
What Is Wear And Galling?
Wear occurs when two surfaces rub together, causing material to gradually wear away. This can occur due to friction, corrosion, or a combination of both. Galling, on the other hand, is a more severe form of wear that occurs when two surfaces rub together and stick, causing material to transfer from one surface to the other. This can result in surface damage, increased friction, and even component failure.
Why Is Wear And Galling Resistance Important?
Wear and galling can lead to a number of problems in mechanical systems. Increased friction can cause components to heat up, leading to damage or failure. Wear can reduce the lifespan of components, leading to increased maintenance costs and downtime. Galling can also cause components to seize up, leading to complete system failure. To prevent these issues, engineers need to select materials with high wear and galling resistance.
What Is The Wear And Galling Resistance Chart?
The wear and galling resistance chart is a useful tool for selecting materials with high wear and galling resistance. It provides a comparison of the wear and galling resistance of various material combinations. The chart is typically organized by material type, such as metals, plastics, and ceramics. Within each material type, different material combinations are ranked based on their wear and galling resistance.
How To Use The Wear And Galling Resistance Chart?
To use the wear and galling resistance chart, engineers need to first identify the specific application and operating conditions. They then need to select the appropriate material type from the chart, such as metals, plastics, or ceramics. Within each material type, engineers can then compare the wear and galling resistance of different material combinations. The chart typically provides a ranking system, with the most wear and galling resistant material combinations at the top.
Factors Affecting Wear And Galling Resistance
Several factors can affect the wear and galling resistance of materials. These include surface finish, lubrication, operating temperature, and load. Materials with a smooth surface finish are less likely to experience wear and galling. Lubrication can also reduce friction and prevent galling. Operating temperature can affect the material's hardness and resistance to wear and galling. Higher loads can also increase the likelihood of wear and galling.
Materials With High Wear And Galling Resistance
Materials with high wear and galling resistance include hardened steel, stainless steel, bronze, and tungsten carbide. Hardened steel is a popular choice for applications that require high wear resistance, such as cutting tools and bearings. Stainless steel is often used in corrosive environments and has good wear and galling resistance. Bronze is a popular choice for bushings and bearings due to its high wear resistance. Tungsten carbide is an extremely hard material that is often used in high wear and high impact applications.
Conclusion
The wear and galling resistance chart is a useful tool for engineers designing mechanical systems. By selecting materials with high wear and galling resistance, engineers can prevent component failure, reduce maintenance costs, and increase the lifespan of their systems. Factors such as surface finish, lubrication, operating temperature, and load can all affect the wear and galling resistance of materials. Materials with high wear and galling resistance include hardened steel, stainless steel, bronze, and tungsten carbide.