Posted by Gordon England (62.252.0.12) on 15:11:46 08/08/05
In Reply to: Change in hardness posted by Ming
: For a gear that is supposed to have a surface hardness of 55HRC, after use for say 10 years, would the surface hardness decrease?
Under normal conditions the hardness should not decrease. Exposure to high temperatures could temper back the hardness. Severe wear or loading could also effect the surface hardness (wearing through case hardened layer or work hardening).
Regards Gordon
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