Novel bearing forge piece for shield tunneling machine and forging method of novel bearing forge piece

Abstract

The invention provides a novel bearing forge piece for a shield tunneling machine and a forging method of the novel bearing forge piece. The forge piece comprises various elements including, by weightpercent, 0.52%-0.60% of C, 0.17%-0.37% of Si, 0.50%-0.80% of Mn, 0.90%-1.20% of Cr, 0.15%-0.30% of Mo, 0.50%-0.70% of Ni, 0.05%-0.1% of Cu, 0.1%-0.2% of W, not larger than 0.015 of P, not larger than0.003 of S, not larger than 0.00018 of H and the balance Fe and normal impurities.

Description

technical field

[0001] The invention relates to a novel bearing forging for a shield machine and a forging method thereof. Background technique

[0002] With the rapid development of urban construction, a large number of traffic tunnels, urban underground railways, water supply and drainage tunnels and cable tunnels have been built, under repair or are being planned. As the main construction machine for shield construction, the shield machine is currently showing a trend of large-diameter development. The Chongming Tunnel in Shanghai has begun to use a shield machine with a diameter of 15m. As the main component of the shield machine bearing, the bearing ring of the shield machine needs to reach a size of 6m or more. Therefore, on the basis of high fatigue strength, hardness, compressive strength, elastic limit, wear resistance and corrosion resistance, steel for large-size bearing rings also needs to have high hardenability, hardenability and certain impact toughness. Ac...