The camshaft is one of the key parts of the engine. The hardness and the depth of the white layer of the camshaft are the key technical indicators that determine the service life of the camshaft and engine efficiency. On the premise of ensuring that the cam has a sufficiently high hardness and a fairly deep white mouth layer, it should also be considered that there is no higher carbide in the journal, so that it has better cutting performance.
The main methods of producing camshafts at home and abroad are: after the steel forging blank is cut, the top part of the cam is high-frequency quenched to form a martensite layer. At the end of the 1970s, Germany and France successively developed a new argon arc remelting process for camshafts; there are also hardenable cast iron camshafts mainly in the United States; chilled cast iron camshafts mainly in Japan and France; and cams The production process of casting surface alloying with Cr-Mn-Mo alloy coating for parts.