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

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...

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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

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