A kind of high-strength toughness weldable corrosion-resistant and wear-resistant steel plate and its preparation method

Abstract

The invention discloses a high-strength toughness weldable corrosion-resistant and wear-resistant steel plate and a preparation method thereof. The technical solution is: the composition and mass content of the steel plate: C is 0.25-0.42%, Si is 0.01-0.10%, Mn is 1.35-1.75%, P≤0.005%, S≤0.002%, Mo is 0.35% ~-0.55%, Ti 0.07-0.19%, Zr 0.12-0.25%, Mg 0.0023-0.0045%, Als 0.015-0.025%, B 0.001-0.008%, N 0.0025-0.0040%, O 0.0005 ~0.0015%, the rest is Fe and trace impurity elements; among the components: Mo / Ti is 1.8~7.0, Ti / Als is 3~13. The addition amount of the alloy in the invention is small, which improves the welding performance and reduces the production cost; through the process control of the whole process of rolling + online quenching + offline quenching + low temperature tempering, the grain size is refined, and the nano-scale Ti content is promoted. The precipitation and dispersion distribution of the second phase particles improve the toughness and corrosion and wear resistance of the product.

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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