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Mirror Polishing HSS M2 plates


April 26, 2010

We have a problem to obtain mirror polishing on HSS M2 plates (thickness 0.044", hardness 65 HRC).

After the heat treatment, the plates are ground with Norton wheels (T01 5SG46-JVS) to remove 0.003" each side. The plates are flipped often during the process. After that, the plates are straight, but polishing is medium.

To obtain a mirror polishing, a grinder wheel with higher grit is used but the heat deforms the plate.

Someone has a suggestion to polish the HSS plates with high hardness and small thickness?

Regards

David Scott
machinist - Windsor, On, Canada


You may want to investigate lapping. Low speed, low heat input, no distortion, better finish than grinding.

Guillermo Marrufo
Monterrey, NL, Mexico
May 4, 2010




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