Hardening of gear wheels. Gear wheels being lifted out of a furnace during case-hardening treatment. During case-hardening the metal is heated with a substance that donates either carbon or nitrogen to it,forming a thin layer of a harder alloy on the metal's surface | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Maximilian Stock |
Taille de l’image : | 3661 px × 4843 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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