High-toughness high-wear-resistance low-density steel for bearing retainer and preparation process

Abstract

The invention discloses high-toughness high-wear-resistance low-density steel for a bearing retainer and a preparation process, and belongs to the technical field of bearing steel. The alloy comprises the following components in percentage by weight: 0.60-1.2% of C, 25-35% of Mn, 6-11% of Al, 0-5% of Ti, 0-0.5% of Mo, 0-0.5% of Nb, 0-0.5% of V, 0-0.5% of Zr and the balance of Fe and inevitable impurities, and the total amount of Ti, Nb, Mo, V and Zr is not higher than 0.5%. On the basis, one or more of the following elements can be additionally added: 0 to 0.50 weight percent of Ni, 0 to 0.60 weight percent of Si, 0 to 0.50 weight percent of Cr, 0 to 0.50 weight percent of Cu, 0 to 0.005 weight percent of B and 0 to 0.050 weight percent of RE. The metal material has the advantages that the density reaches 6.5-7.1 g / cm < 3 >, the room-temperature yield strength is 500-800 MPa, the room-temperature plasticity is 40-80%, and the room-temperature wear resistance and obdurability are superior to those of low-carbon steel, medium-carbon steel, brass and other metal materials for traditional retainers.

Description

technical field [0001] The invention belongs to the technical field of bearing steel and provides a high-strength, high-toughness, high-wear-resistance, low-density steel used for a bearing cage. Background technique [0002] When the rolling bearing is working, especially when the load is complex and rotates at high speed, the cage has to bear a lot of centrifugal force, shock and vibration, there is a large sliding friction between the cage and the rolling elements, and a lot of heat is generated. The result of the combined action of force and heat can lead to failure of the cage, and in severe cases, it will cause burns and fracture of the cage. Therefore, the cage material is required to have good thermal conductivity, good wear resistance, small friction coefficient, low density, certain strength and toughness, good elasticity and stiffness, expansion coefficient similar to rolling elements and good Processing performance. In addition, the cage is also affected by che...

AI Technical Summary

Problems solved by technology

Compared with the low cost and simple process of metal cages, the application of non-metallic materials and composite materials in cages is limited

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