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

A technology with high wear resistance and ledeburite, applied in the field of powder metallurgy, can solve problems such as low toughness, carbide segregation, fracture, etc., and achieve the effects of improving toughness and fatigue strength, increasing hardness, and reducing use costs

Inactive Publication Date: 2017-12-05
鲍凡凡
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at solving the problem that the existing D2 cold work die steel is prone to serious carbide segregation, which leads to low toughness, small gaps and fractures, and provides a high hardness, high wear resistance, high tungsten ledeburite gear steel and its preparation method

Method used

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Embodiment Construction

[0020] The present invention will be further described below:

[0021] A kind of high hardness high wear resistance high tungsten ledeburite gear steel and preparation method thereof, is made up of the raw material of following mass percentage, C 1.8%; Si 0.5%; Mn 0.25%; S 0.015%; P 0.025%; Cr 2.5 %; Mo 1.25%; V 0.8%; Nb 0.16%; RE 0.05%; Ni 0.12%; W 0.30%; the rest is Fe and impurities.

[0022] A high hardness, high wear resistance high tungsten ledeburite gear steel and a preparation method thereof, comprising the following steps:

[0023] (1) Put steel scrap raw materials into an electric arc furnace for smelting at a melting temperature of 1300°C, add raw materials and deoxidizers during the smelting process, and then carry out secondary refining through ladle refining furnace and vacuum degassing furnace;

[0024] (2) Preheat the steel ingot mold to 320°C, and the casting temperature is 1400°C. After heat preservation, the mold is demoulded and heat preservation is slowl...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/12C22C38/02C22C38/04C22C38/08C21D9/32C21D1/18C21D1/28
CPCC21D1/18C21D1/28C21D9/32C21D2211/007C22C38/005C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18Y02P10/20
Inventor 鲍凡凡
Owner 鲍凡凡
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