Alloy steel gear capable of reducing gear face plastic deformation

Abstract

The alloy steel gear that can reduce the plastic deformation of the tooth surface belongs to the field of powder metallurgy technology. The components and weight percentage of the gear are: C 1.2-1.6%, Si 1.05-1.8%, Mn 0.125-0.325%, Cr 0.03-0.06% , W 0.015~0.185%, S 0.1~0.3%, P 0.12~0.325%, Zn 0.013~0.021%, Ti 0.005~0.018%, and the rest is Fe with metallographic structure of ferrite + austenite and unavoidable Impurities. The surface carburizing treatment of the present invention improves the surface hardness of the gear, and the surface quenching treatment improves the hardness of the gear teeth and the surface strength of the gear teeth, reduces the wear of the tooth surface, and improves the gear's hardness through normalizing and tempering treatment. The internal mechanical properties, toughness and fatigue strength have been greatly improved. Finally, the grinding treatment is adopted, especially the stress on the surface is passivated. The use requirements of speed occasions.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy and relates to a gear, in particular to an alloy steel gear which can reduce the plastic deformation of the tooth surface. Background technique [0002] China's gear industry has developed rapidly during the "Tenth Five-Year Plan" period: in 2005, the annual output value of the gear industry increased from 24 billion yuan in 2000 to 68.3 billion yuan, with a compound annual growth rate of 23.27%, and it has become the largest in China's mechanical basic parts. industry. In terms of market demand and production scale, China's gear industry has surpassed Italy in the global ranking, ranking fourth in the world. [0003] Gears and their gear products are important basic parts of mechanical equipment, and the main transmission parts of most complete sets of mechanical equipment are gear transmissions. With the rapid development of the national economy, the total annual sales of the entire ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of traditional gears, such as that the toughness will decrease when the hardness increases, and the tooth surface of the traditional gear is easy to wear, and the teeth are prone to plastic deformation or breakage, the present invention proposes an alloy steel gear that can reduce the plastic deformation of the tooth surface. The components are more reasonable and the working life is longer, which can greatly improve the mechanical properties of gears and meet the needs of various load-bearing and high-speed occasions