Application of carburizing and quenching steel in reduction gears of coal mining machines, continuous miners, roadheaders, heavy scraper conveyors, etc.

Carburized and hardened steel:

It is mainly used for closed gearboxes with high transmission power, high load-bearing capacity, high bending strength, high contact strength, high fatigue resistance, good impact toughness, and excellent wear resistance. The tooth surface contact stress is >1000MPa.

This type of steel is a multi-element low-carbon alloy steel, which should be normalized or quenched and tempered before being used for rough machining.gearCarburizing treatment, low temperature tempering and final gear grinding, the manufacturing accuracy can reach level 6.The surface hardness is HRC58-63, and the core hardness ≥HRC39.

Commonly used carburizing and quenching steel grades for gears of reduction gears such as coal mining machines, continuous miners, tunneling machines, heavy-duty scraper conveyors, etc. are:

20CrMnMo，17CrNiMo6，12Cr2Ni4，20C2Ni4，20CrMnti。其中以20Cr2Ni4和20CrMnMo两种钢号居多。