| 摘要 |
A chain pin includes a carbide layer that is principally composed of vanadium carbide, but also contains a small quantity of chromium carbide formed on the top of the steel forming the base metal of the chain pin. A boundary layer (i.e., chrome-rich layer) is formed in the boundary region between the carbide layer and the base metal. The vanadium carbide content decreases sharply and the chromium carbide content increases sharply in the boundary layer. Since the carbide layer formed on the top of the base metal consists principally of vanadium carbide, it is possible to prevent peeling from the surface of the carbide layer. Moreover, the boundary layer between the carbide layer and the base metal contains a relatively large quantity of chrome, so the bonding force between the base metal and the carbide layer is increased via the boundary layer. This prevents the carbide layer from peeling from the base metal. Thus, even at high surface pressures, it is possible to improve the wear resistance of the pin. In an alternative embodiment, the principal component of the carbide layer is selected from on or more of the following carbides: vanadium carbide, titanium carbide niobium carbide, or tungsten carbide. The method of manufacturing this chain pin, as well as a power transmission chain which uses the chain pin, is also disclosed.
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