Modified stepped pad for rolling mill and surface cladding and surfacing technology of modified stepped pad

Abstract

The invention relates to the technical field of metal surface treatment, and particularly discloses a modified stepped pad for a rolling mill and a surface cladding surfacing process of the modified stepped pad. The step pad for the rolling mill comprises a base layer, and the base layer comprises the following components in percentage by mass: 0.15%-0.18% of C, 0.3%-0.35% of Si, 1.5%-1.6% of Mn, 3.0%-3.2% of Ni, 1.5%-2.0% of Cr, 1.0%-2.0% of Cu, 1.0%-1.2% of Al, 0.5%-1.0% of Mo, smaller than or equal to 0.035% of P, smaller than or equal to 0.07% of Co, smaller than or equal to 0.1% of S, smaller than or equal to 0.07% of Ti, smaller than or equal to 0.015% of Nb, smaller than or equal to 0.08% of V and the balance of Fe. The step pad has excellent wear resistance, impact resistance and wear resistance and is long in service life.

Description

technical field [0001] This application relates to the field of metal surface treatment technology, more specifically, it relates to a modified step pad for rolling mill and its surface cladding and overlay welding process. Background technique [0002] The rolling mill is the equipment that realizes the metal rolling process, and the metal material is rolled into a rolled material with a certain cross-sectional shape. The stepped pad is one of the important components of the rolling mill. During the steel plate rolling process, the energy generated by the dynamic pressure, static pressure and impact will be transmitted to the roll neck through the roll body, and then transmitted from the roll neck to the bearing seat, and then by the bearing The seat passes to the step pad. In addition, the stepped pad will be corroded by the cooling water and abrasively worn by the oxide scales on the surface of the steel plate. Based on the above use environment, the stepped mat is requ...

AI Technical Summary

Problems solved by technology

The overall hardness is high and the wear resistance is good, but the overall mechanical properties are not good, frequent fractures occur, and the average service life is less than 1 year

The overall mechanical properties are good, the toughness and strength are high, but the corrosion resistance and wear resistance are poor, and the surface corrosion and wear are serious, which seriously affects the precision and rolling stability of the rolling mill. The average service life is less than 9 months

[0005] In view of the above-mentioned related technologies, the inventor believes that there is a problem that the service life of step pads is generally short

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