450HB-grade rare earth high-wear-resistance steel plate

Abstract

The invention discloses a 450HB-grade rare earth high-wear-resistance steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.18 to 0.21 percent of C, 0.20 to 0.50 percent of Si, 1.10 to 1.40 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.002 percent of S, 0.40 to 0.90 percent of Cr, 0.008 to 0.018 percent of Ti, 0.0010 to 0.0020 percent of B, 0.15 to 0.50 percent of Mo, 0.15 to 0.30 percent of Ni, less than or equal to 0.0035 percent of Ce, 0.025 to 0.04 percent of Als, 0.56 to 0.69 percent of CEV, and the balance Fe and inevitable impurities. The steel plate provided by the invention has excellent wear resistance, and under the same condition, the wear loss can reach 85% or below of the wear loss of a same-grade steel plate in the prior art.

Description

technical field [0001] The invention belongs to the field of quenched and tempered rare earth high-strength wear-resistant steel plates, in particular to a 450HB grade rare earth high wear-resistant steel plate, in particular to a 450HB rare earth high wear-resistant steel plate for a coal scraper. Background technique [0002] The working conditions and environment in the process of coal mining and transportation are extremely complex. During the service process, the steel plate is faced with the synergistic effect of multi-factor wear (or corrosion) such as coal, gangue, environmental media (temperature, humidity, corrosive atmosphere) and load stress. The working conditions of different mines are very different: under normal working conditions, the gangue content is about 10%, with normal temperature and humidity; while under harsh working conditions, the gangue content can reach 50%, the underground temperature is as high as 40°C, and the humidity is above 90%. The wear ...

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Problems solved by technology

However, this document W3 does not specifically characterize its wear resistance

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