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17-7 normalizing after accidentally heat treating?

Some 17-7 steel rings were mistakenly heat treated to 30- 32 HRC. Not sure what happened. Should have been Minimum 36 Hrc. The rings are .100 thick. laser cut from plate and mounted in jigs.
Is it possible to redo the process and what are the steps involved.

Karsten Nordenhof
Machine shop Foreman - Edmonton,AB Canada
December 4, 2009

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