Coal-water abrasion and corrosion resistant steel plate for railway coal transport vehicle and manufacturing method thereof

Abstract

The invention discloses a coal-water abrasion and corrosion resistant steel plate for a railway coal transport vehicle and a manufacturing method thereof. The coal-water abrasion and corrosion resistant steel plate comprises the chemical components of, by weight, 0.01-0.15% of C, 0.10-0.50% of Si, 0.20-1.0% of Mn, 0.020% or less of P, 0.010% or less of S, 0.20-0.60% of Cu, 0.50-1.5% of Ni, 0.20-2.0% of Cr, 0.030-0.10% of Sb, 0-0.25% of Mo, 0-0.05% of Nb, 0-0.05% of V, 0-0.10% of Ti, 0-0.005% of B and the balance Fe and impurities, wherein C, Cr and Ni need to meet the relation of 1.6%<=12C+Cr / Ni<=2.8%. The steel plate is manufactured through the ten steps of blast-furnace iron melting, molten iron pre-desulfuration, converter smelting, LF+RH refining, plate blank continuous casting, cast blank slow cooling, plate blank heating, hot continuous rolling, laminar flow cooling and reeling, the yield strength of the steel plate is 450 MPa grade, the steel plate is excellent in mechanical performance, the service life of the steel plate under the coal-water abrasion and corrosion environment can be greatly prolonged, and the obvious competition advantage in the railway coal transport vehicle carriage manufacturing industry is achieved.

Description

technical field [0001] The invention relates to the technical manufacturing field of hot-rolled steel plates used in the box body manufacturing industry of railway coal transporting vehicles, in particular to a coal water wear and corrosion resistant steel plate for railway coal transporting vehicles and a manufacturing method thereof. Background technique [0002] With the rapid development of high-speed and heavy-duty railway coal transportation vehicles, weight reduction, high strength and high corrosion resistance of the vehicle body have become a development trend. High strength can reduce the wall thickness of vehicles that meet the strength requirements, and high corrosion resistance can reduce To meet the wall thickness allowance of corrosion life, and further improve the service life of the car body. [0003] In China, such as the Daqin Railway, coal transportation is mainly used. The corrosion evaluation standards stipulated in the delivery technical conditions of ...

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Problems solved by technology

[0007] Chinese patent CN 102268613A discloses an atmospheric corrosion-resistant hot-rolled steel plate for railway freight cars and its manufacturing method. It adds Sb to the steel and simultaneously controls the content of Cr and Ni to satisfy 1.48%≤Ni+0.85Cr≤2.05%, C , Ti, Nb, and V content satisfy Ti / C≥1.0, (Ti+Nb+V) / C≥3, and the steel plate with good corrosion resistance can be obtained through continuous casting, hot continuous rolling, and coiling, but the corrosion resistance is slightly There are deficiencies

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