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Selection of gear materials
- Dec 22, 2017 -

Selection of gear materials

The commonly used steel for making gears includes quenched and tempered steel, quenched steel, carburized and quenched steel and nitriding steel. Steel strength is slightly lower than the forged steel, commonly used in large size gear; poor mechanical properties of gray cast iron, can be used for open gears of light load; ductile iron can partly replace steel gear; plastic gear for low noise and light load and place, with the general use of gear steel gear with good heat conduction.

In the future, the gear is developing in the direction of heavy load, high speed, high precision and high efficiency, and it also seeks the small size, light weight, long life and economic reliability.

The development of gear theory and manufacturing process will be further study on the mechanism of tooth damage, this calculation method is to establish a reliable strength basis, is to improve the bearing capacity of the gear, theoretical basis for prolonging the service life of the gears; the development of new tooth with circular arc tooth profile as the representative of the new technology; new type of gear materials and manufacturing gear the research of gear; elastic deformation, manufacturing and installation errors and the distribution of temperature field and of tooth modification, to improve the smooth running gear, the contact area and increase gear at full load, so as to improve the bearing capacity of the gear.

Friction, lubrication theory and lubrication technology is the basis of the research work of the gear, the elastohydrodynamic lubrication theory, promote the use of synthetic lubricating oil in the oil and properly adding extreme pressure additives, not only can improve the bearing capacity of the tooth surface, but also can improve the transmission efficiency.


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