| 摘要 |
A top drive thrust bearing configured for use in a heavy loaded top drive system. The top drive thrust bearing includes an upper plate; a lower plate; and a plurality of rollers disposed between the upper plate and the lower plate. The composition of the top drive thrust bearing comprising a non-vacuum arc remelted steel including, in weight percent (%),0.15% to 0.18% carbon (C), 0.15% to 0.4% silicon (Si), 0.4% to 0.7% manganese (Mn), 0% to 0.025% phosphorus (P), 0.0005% to 0.002% sulfur (S), 0.0002% to 0.0007% oxygen (O), 0.001% to 0.003% titanium (Ti), 1.3% to 1.6% chromium (Cr), 3.25% to 3.75% nickel (Ni), 0.0005% to 0.003% calcium (Ca), 0.15% to 0.25% molybdenum (Mo), balance iron (Fe). The top drive thrust bearing of the top drive system is configured to achieve an extended life cycle at least about equivalent to a life factor of three for a vacuum arc remelted steel. |
