High-hardness and high-abrasion-resistance high tungsten ledeburite gear steel and preparation method thereof

Abstract

The invention discloses a high-hardness and high-abrasion-resistance high tungsten ledeburite gear steel and a preparation method thereof and belongs to the technical field of powder metallurgy. The high-hardness and high-abrasion-resistance high tungsten ledeburite gear steel is composed of the following raw materials of, by mass, 1. 8% of C, 0.5% of Si, 0.25% of Mn, 0.015% of S, 0.025% of P, 2.5% of Cr, 1.25% of Mo, 0.8% of V, 0.16% of Nb, 0.05% of Re, 0.12% of Ni, 0.30% of W and the balance Fe and impurities. The high-hardness and high-abrasion-resistance high tungsten ledeburite gear steel can replace cold working die steel such as Cr12MoV steel and D2 steel, the toughness and abrasion resistance of a die are improved, the service life is greatly prolonged so as to reduce the use cost and expand the use range, the problems of poor toughness, tipping or breaking and poor abrasion resistance under special use environments such as the large impact load, the high working speed, high precision and the long life can be effectively solved, and the use requirements of multiple high bearing and high rotating speed occasions are met.

Description

technical field

[0001] The invention belongs to the technical field of powder metallurgy, and relates to a gear steel and a preparation method thereof, in particular to a high-hardness, high wear resistance, high tungsten ledeburite gear steel and a preparation method thereof. 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 developm...