Corrosion-resistant 500HB martensite wear-resistant steel plate and production method thereof

Abstract

The invention relates to a corrosion-resistant 500HB martensite wear-resistant steel plate which comprises the following chemical components in percentage by mass: 0.25 to 0.30 percent of C, 0.10 to 0.40 percent of Si, 0.10 to 0.30 percent of Mn, 0.010 to 0.040 percent of Nb, 0.010 to 0.040 percent of V, 0.010 to 0.040 percent of Ti, 0.02 to 0.05 percent of Al, 0.50 to 0.65 percent of Cu, 1.50 to 2.00 percent of Ni, 1.80 to 2.50 percent of Cr, 0.50 to 1.00 percent of Mo, 0.001 to 0.005 percent of B, 0.0010 to 0.0050 percent of Ca, less than or equal to 0.015 percent of P, less than or equal to 0.0015 percent of S, less than or equal to 0.0015 percent of O, less than or equal to 0.0035 percent of N, less than or equal to 0.0002 percent of H and the The microscopic structure is a fine martensite structure; the surface Brinell hardness is 470 to 530 HB; the tensile strength is larger than or equal to 1600 MPa, the ductility is larger than or equal to 10%, the Charpy V-type impact energy at the temperature of-40 DEG C is larger than or equal to 30 J, and good low-temperature toughness and strength are shown. Under the acidic working condition that the pH value of the steel plate is 4.5-6.5, the corrosion and wear resistance of the steel plate can be 1.5 times or above that of common martensite wear-resistant steel with the same hardness.

Description

technical field [0001] The invention relates to an iron-based alloy wear-resistant steel, belonging to the technical field of iron-based alloy steel. Background technique [0002] Martensitic wear-resistant steel has good strength, toughness and weldability, and has been widely used in construction machinery, mining machinery and coal mining machinery. However, the wear resistance of the wear-resistant steel under wet conditions cannot be well guaranteed. For example, wear-resistant steel for the body of sanitation trucks, due to the existence of garbage liquid, the surface of the steel plate corrodes quickly, resulting in increased wear; the middle groove of the coal mine mechanical shearer, under the harsh working conditions of weak acid in the wet mine, the steel plate is in the Under the dual action of corrosion and wear, it will quickly fail, and the service life of the equipment will be greatly reduced. Therefore, it is necessary to solve the problem of corrosion and...

AI Technical Summary

Problems solved by technology

The addition of elements such as high Cr, low melting point, and low toughness will inevitably lead to the reduction of toughness and easy cracks in the process of steel plate preparation and application at the source, so the use of harsh processes limits the wide application of such products

In addition, the hardness of the existing steel plates is generally 450HB or below, which belongs to low-grade wear-resistant steel plates.

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