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What is "stress relief" on an engine block?

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Old Apr 11, 2019 | 10:51 PM
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Originally Posted by LLLosingit
Really so what is cold forging then?
Typically forging is done at 1900-2200 degrees. Cold forging is done at a very brisk 1500 degrees. Approximately. The word cold is relative.
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Old Apr 13, 2019 | 12:32 AM
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Default Vibratory stress relief

I use a Stress Relief Engineering Formula 62 vibratory stress relief machine. This machine will greatly reduce the residual stress put in the casting during machining or welding. If the stress is left in the block there is a very good chance of the casting warping in use resulting in out of round bores and out of alignment main bearing bores.

These are not inexpensive machines. Vibratory stress relief is a necessary part of the process otherwise I wouldn't have purchased the machine.

My dad used to tell me that if a job is worth doing it's worth doing right.

I attached a pdf from Stress Relief Engineering about the process.

Steve
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File Type: pdf
formula62.pdf (1.18 MB, 148 views)
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