High-strength and high-toughness weldable corrosion-resistant and abrasion-resistant steel plate and preparation method thereof

Abstract

The invention discloses a high-strength and high-toughness weldable corrosion-resistant and abrasion-resistant steel plate and a preparation method thereof. According to the technical scheme, the steel plate comprises, by mass, 0.25-0.42% of C, 0.01-0.10% of Si, 1.35-1.75% of Mn, not greater than 0.005% of P, not greater than 0.002% of S, 0.35-0.55% of Mo, 0.07-0.19% of Ti, 0.12-0.25% of Zr, 0.0023-0.0045% of Mg, 0.015-0.025% of Als, 0.001-0.008% of B, 0.0025-0.0040% of N, 0.0005-0.0015% of O, and the balance Fe and trace impurity elements, wherein the ratio of Mo to Ti is 1.8-7.0, and the ratio of Ti to Als is 3-13. According to the high-strength and high-toughness weldable corrosion-resistant and abrasion-resistant steel plate and the preparation method thereof, the alloy adding amount is small, the welding performance is improved, and the production cost is reduced; and through whole-process technological control of rolling, online quenching, offline quenching and low-temperature tempering, the grain size is refined, precipitation and dispersion distribution of nanoscale Ti-containing second-phase particles are promoted, and the toughness and corrosion-resistant and abrasion-resistant performance of the product are improved.

Description

technical field [0001] The invention belongs to the technical field of corrosion-resistant and wear-resistant steel plates. In particular, it relates to a high-strength toughness weldable corrosion-resistant and wear-resistant steel plate and a preparation method thereof. Background technique [0002] In the ocean and other environments where corrosive liquids and gases exist, materials will suffer from different degrees of corrosion and wear, that is, materials will be worn by solid particles while bearing medium corrosion, such as seawater with high sediment content. scour. Generally speaking, the combined effect of corrosion and wear is much more serious than pure wear or corrosion, resulting in material loss and equipment damage. [0003] In order to cope with the corrosive wear environment, technicians have developed a variety of corrosion-resistant and wear-resistant materials. At present, there are two main types of materials to choose from: non-metallic materials ...

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Problems solved by technology

[0010] Although the corrosion-resistant and wear-resistant materials disclosed above have their own advantages, they have defects such as poor welding performance, insufficient toughness, and poor wear resistance under corrosive conditions, and the high cost is not conducive to popularization and application.

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