1.800 Umdrehungen pro Minute – 1.800 Mal Stahl auf Stahl. Das halten nur die härtesten Motorteile aus. Doch wie werden sie hart?
STORY

How do we make... metal harder?

Posted on October 31, 2013, Images by Robert Hack

1,800 revolutions per minute – steel on steel. Only the very hardest of components can take the strain. But how is that hardness achieved?
Friedrichshafen, Germany

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Hardening shop workers lift the red-hot camshafts out of the 850° annealing furnaces with a crane and immerse them immediately in an oil bath for quenching.
Angelo Caruso tests the hardness of the heat-treated camshafts using the Rockwell method.
The hardness test is followed by the peening stage for cleaning. Gunther Dziewas takes the finished camshafts out of the sand-blasting machine.

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Harald Münch
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+49 7541 90 4341
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