Method for solving problem of excessive seepage of 18CrNi4A material narrow-tooth-shaped component tooth crest
A technology of narrow tooth shape and parts, which is applied in the field of over-infiltration of tooth tops of narrow tooth-shaped parts made of 18CrNi4A material. Reasonable effect of use requirements and process technology
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[0027] The material is 18CrNi4A, the modulus m=2.822, the number of teeth is 47, and the pressure angle is 20 o gears as an example. The effective carburized layer depth at the middle of the tooth center is required to be 0.85-1.05mm, and the effective carburized layer depth at the tooth top required by the design is required to be 0.85-1.05mm. The specific carburizing steps are:
[0028] 1. After processing the tooth shape of the tooth-shaped parts, the top of the tooth and the tooth surfaces on both sides connected to the top of the tooth are protected by copper plating. The thickness of the copper plating layer is 2 μm;
[0029] 2. After copper plating, the parts are cleaned and transferred to a controlled atmosphere heat treatment furnace;
[0030] 3. The carburizing potential of the controllable atmosphere furnace is set to 1.10, the carburizing temperature is 900°C, and the first carburizing time is set to 1 hour; Medium cooling;
[0031] 4. Temper in a high-temperatu...
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