Alloy steel gear with gear tooth surface with high abrasive resistance

Abstract

An alloy steel gear with a high wear resistance tooth surface belongs to the technical field of powder metallurgy. The components of the gear and their weight percentages are: C 3.1-3.4%, Si 1.5-2.2%, Mn 0.1-0.3%, S 0.1 ~0.3%, P 0.1~0.4%, Te 0.013~0.021%, and the rest are Fe with metallographic structure of ferrite + austenite and unavoidable impurities. The invention has novel components, reasonable and clear manufacturing process, surface carburizing treatment improves the surface hardness of the gear, 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 through normalizing And tempering treatment improves the internal mechanical properties of the gear, and its toughness and fatigue strength have been greatly improved. Finally, the grinding treatment is adopted, especially the stress on the surface is passivated, and the service life of the gear is greatly improved. , to meet the needs of a variety of high-load, high-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 with a high wear resistance 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 industry have excee...

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 surfaces of traditional gears are easy to wear, and the teeth are prone to plastic deformation or breakage, the present invention proposes an alloy steel gear with high wear resistance tooth surface. The components of the gear are more reasonable and the working life is longer, which can greatly improve the mechanical properties of the gear and meet the needs of various load-bearing and high-speed occasions