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Fire safety in heat treatment of gear production

(1) Fire protection requirements for buildings of heat treatment plant: The heat treatment workshop or working section shall be set at the periphery of the workshop and separated from other workshops by firewalls. There shall be a special warehouse for storing flammable or combustible liquids and meeting the fire...

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Common materials for gear production

The common materials for gears are 20Cr, 20CrMnTi and 18Cr2Ni4WA. (1) 20Cr It has high strength and hardenability, but poor toughness. During carburizing, there is a tendency of grain growth, and the direct cooling quenching has a great influence on the impact toughness. Therefore, after carburizing, the secondary quenching...

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