Steel for caterpillar type engineering machinery caterpillar link pin bushes and production method thereof

Abstract

The invention relates to steel for caterpillar type engineering machinery caterpillar link pin bushes and a production method thereof, which belong to the technical field of metallurgy. The steel for the caterpillar type engineering machinery caterpillar link pin bushes consists of the following chemical components in percentage by weight: 0.38 to 0.43 percent of C, 0.10 to 0.25 percent of Si, 0.60 to 0.85 percent of Mn, 0.90 to 1.20 percent of Cr, 0.30 percent or less than 0.30 percent of Cu, 0.025 percent or less than 0.025 percent of S, 0.030 percent or less than 0.030 percent of P, 0.20 percent or less than 0.20 percent of Ni, 0.001 to 0.004 percent of B, 0.030 to 0.050 percent of Ti, 0.015 to 0.060 percent of Al, 15*10< -6 > percent or less than 15*10< -6 > percent of O, 3*10 <-6 > percent or less than 3*10 <-6 > percent of H, 60*10 <- 6> percent or less than 60*10 <- 6> percent of N and the balance Fe and inevitable impurities. The invention also provides the production method for the steel for the caterpillar type engineering machinery caterpillar link pin bushes, and the production method can be adopted to produce round steel with the specification of 30mm to 100mm in diameter. The steel has high fatigue resistance, wear resistance and corrosion resistance, the performance of a machined caterpillar type engineering machinery caterpillar link pin bush is excellent, and the service life of the caterpillar type engineering machinery caterpillar link pin bush made of the steel is longer than the service life of the caterpillar type engineering machinery caterpillar link pin bush made of an ordinary alloy structure steel material.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a steel used for manufacturing crawler-type construction machinery chain rail joint pin sleeves and a manufacturing method thereof. Background technique [0002] Crawler bulldozers mainly work in relatively complex and harsh environments. Track pins and bushings are an important part of connecting chain rail links. When the bulldozer is in operation, the contact stress between the pin and the pin sleeve changes cyclically and is in a state of friction, and its internal wear is inevitable. Regardless of whether the bulldozer is moving forward or backward, the pin and the pin sleeve are in contact on the same side, so the inner side of the pin sleeve is worn on one side. At the same time, the outer side of the pin sleeve will be damaged by the extrusion, impact and friction of the driving wheel teeth. When the bulldozer is operating in swampy or rocky areas, sand and gravel par...

AI Technical Summary

Problems solved by technology

[0009] The invention aims at the use requirements of the steel for the chain rail joint pin sleeve of crawler-type construction machinery, develops and produces anti-fatigue and corrosion-resistant boron micro-alloyed pin sleeve steel, and improves the preparation method by rationally designing the composition of the steel; solves the problems of steel composition design, performance, structure, Purity, surface quality problems, providing a track-type construction machinery chain track joint pin sleeve steel and its manufacturing method that can meet the needs of users

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