Steel for low-carbon wear-resistant engineering machinery creeper tread and manufacturing method thereof

A track shoe and impurity technology, applied in the field of metallurgy, can solve problems such as large quality fluctuations, low production efficiency, and high cost, and achieve the effect of ensuring hardenability and excellent mechanical properties

Inactive Publication Date: 2010-03-03
KUNMING IRON & STEEL
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The above patent documents involve the production of track shoe materials by casting process, which requires high alloying elements in the chemical composition, low production efficiency, high cost, and large quality fluctuations

Method used

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  • Steel for low-carbon wear-resistant engineering machinery creeper tread and manufacturing method thereof

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Embodiment 1

[0030] How the present invention is implemented is specifically described with the production process of a 180mm×220mm billet.

[0031] The specific process steps are:

[0032] (1) Smelting and alloying, smelting and tapping by adding 40-60% molten iron ingredients in an electric furnace, refining outside the furnace, and vacuum degassing treatment. Argon is blown through the ladle, the argon flow rate is 40-80L / min; the vacuum degree is less than 67Pa and the holding time is 8-12min for degassing treatment, which strengthens the control of deoxidation and degassing smelting of steel; the final deoxidation is fed to the aluminum wire to control the aluminum content of 0.020-0.050%; After feeding the aluminum wire for 5-8 minutes, feed a certain amount of titanium wire according to the control of the titanium content at 0.020-0.060%; add ferroboron before the vacuum degassing treatment to ensure that the chemical composition, especially the effective boron content, is 0.0005-0....

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Abstract

The invention relates to steel for a low-carbon wear-resistant engineering machinery creeper tread and a manufacturing method thereof. The steel comprises the following chemical components in percentage by weight: 0.17-0.27 percent of C, 0.17-0.37 percent of Si, 0.85-1.20 percent of Mn, 0.10-0.30 percent of Cr, 0.010-0.060 percent of Al, 0.010-0.20 percent of Cu, 0.01-0.20 percent of Ni, 0.003-0.025 percent of P, 0.001-0.025 percent of S, 0.020-0.060 percent of Ti, 0.0005-0.0035 percent of B, 5-20*10<-6> percent of [O], 40-90*10<-6> percent of [N] and the balance of Fe and inevitable impurities. The manufacturing method adopts an electric furnace for smelting and making steel, an LF furnace for external refining and VD for vacuum degassing treatment. The steel and the manufacturing methodhave excellent technical effects.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a low-carbon wear-resistant engineering machinery crawler shoe steel and a manufacturing method thereof. Background technique [0002] Most of the sites where the crawler shoes are easy to wear are rocky grounds, and the shoes are the most consumed parts in crawler-type walking machinery. Generally, the service life of a set of track shoes is required to reach 8000-10000h. Most of the United States and Japan use medium-carbon boron steel or manganese steel for rolling track shoes. After overall quenching and tempering, the ribs are then subjected to intermediate frequency induction hardening (water spray quenching) and low-temperature tempering to improve the wear resistance of the ribs. For example, the chemical composition (%) of 10B35 in Japan's SMn433 country is: C: 0.02~0.38, Si: 0.15~0.35, Mn: 0.60~0.90, S≤0.035, P≤0.030, Cu≤0.30, Ni≤0.20 , Cr≤0.20, B: 0.003~0.0005. Jap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C21C7/06C21C7/076B22D11/18B21B37/74
Inventor 翟正龙戈文英王广连徐锡坤张继奎申景霞孙丰军郑桂云卢栋马佐仓王学利梁建国马传庆
Owner KUNMING IRON & STEEL
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