Composite wear-resistant steel plate with good ductility and toughness, and manufacturing method thereof

Abstract

The invention provides a composite wear-resistant steel plate with good ductility and toughness, and a manufacturing method thereof. The upper wear-resistant layer of the steel is composed of the following chemical components in percentage by weight: 0.13% to 0.22% of C, 0.15% to 0.50% of Si, 1.0% to 1.50% of Mn, not more than 0.005% of S, not more than 0.02% of P, 0.0% to 0.50% of Cr, 0.18% to 0.25% of Mo, 0.015% to 0.03% of Ti, 0.0010% to 0.0020% of B, 0.03% to 0.05% of Als, and the balance being Fe and inevitable impurities; and the lower basic layer comprises the following chemical components in percentage by weight: 0.13% to 0.20% of C, 0.15% to 0.50% of Si, 0.8% to 1.70% of Mn, not more than 0.005% of S, not more than 0.02% of P, 0% to 0.050% of Nb, 0% to 0.2% of V, 0% to 0.03% of Ti, and the balance being Fe and inevitable impurities. The manufacturing method comprises following steps: welding the upper continuous casting slab and the lower continuous casting slab together, then rolling, wherein the rolling temperature is not lower than 1000 DEG C, and the reduction rate of the first three rolling processes is 10% to 25%; thermally leveling the integrated slab after the rolling process, piling up, slowly cooling down, simultaneously carrying out a offline thermal treatment on the wear-resistant layer and the basic layer after the cooling process, wherein the wear-resistant layer is on the top and the basic layer is on the bottom; carrying out a quenching treatment on the wear-resistant layer, and carrying out an air-cooling and normalizing treatment on the basic layer. The steel plate has the advantages of low alloy content, long service life, uniform performance, good ductility and toughness, and completeness in specifications. Moreover, the steel can be produced through automatic production lines, and thus the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a single-sided composite wear-resistant steel plate with good plasticity and toughness and a manufacturing method thereof. Background technique [0002] Composite wear-resistant steel plate is a kind of wear-resistant composite material produced by advanced composite manufacturing technology, and it is an advanced wear-resistant composite material in the industrial field. At present, composite wear-resistant steel plates are mainly used in various wear-resistant equipment in metallurgical machinery, building materials machinery, electric machinery, mining machinery and other industries. [0003] Composite wear-resistant steel plate has the following advantages compared with ordinary single-quality wear-resistant steel plate: [0004] Impact resistance: Since the substrate of the wear-resistant composite steel plate is made of ordinary carbon low-alloy steel with good plasti...

AI Technical Summary

Problems solved by technology

[0011] The composite wear-resistant steel plate produced by the above method has a high alloy content, which leads to an increase in cost, and the wear-resistant layer of the composite plate is thin and has a short life.

Produced by surfacing welding, the wear-resistant layer is unevenly distributed, and cracks are prone to appear on the surface

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