The circular DCT coordinating Gear face has a hardness of 156HB, The material used in this product is low-carbon alloy steel, which can be divided into three types according to the tendency of various elements to form carbides in steel:

As long as there is enough carbon in these elements, under appropriate conditions, they will form their own carbides; Only in the absence of carbon or high temperature conditions, as an atomic state into the solid solution.

② Carbide forming elements, such as manganese, chromium, tungsten, molybdenum, etc. Some of these elements enter the solid solution in atomic state, and the other part forms replacement alloy cementite, such as (Fe, Mn)3C, (Fe, Cr)3C, etc., if the content exceeds a certain limit (except manganese), and will form their carbides, such as (Fe, Cr)7C3, (Fe, W)6C, etc.

(3) Do not form carbide elements, such as silicon, aluminum, copper, nickel, cobalt, etc. Such elements generally exist as atoms in austenite, ferrite and other solid solutions.

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