Steel for wear-resistant and corrosion-resistant chain plate and manufacturing method thereof

Abstract

The invention provides steel for a wear-resistant and corrosion-resistant chain plate and a manufacturing method thereof. The steel comprises the following components of, in percentage by weight, 0.48%-0.63% of C, less than or equal to 0.40% of Si, 0.4%-1.1% of Mn, less then or equal to 0.50% of Cr, less than or equal to 0.5% of Nb, 0.015%-0. 1% of Al, 0.05%-0.5% of V, 0.03%-0.1% of Ti, 0.05%-0. 5% of Cu, 0. 05%-0.2% of Sb, less than or equal to 0. 0015% of O, less than or equal to 0.020% of impurity element P, less than or equal to 0.010% of impurity element S, and the balance Fe and unavoidable impurities. The manufacturing method comprises smelting, slab continuous casting and rolling and hot rolling. The average corrosion rate of a steel plate produced by using the method does not exceed 20g / m2.h, all kinds of non-metallic inclusions are less than grade 1.5, the depth of a single-sided surface decarburization layer is less than the thickness of the plate by 1.5%, no grain boundaryoxidation is achieved, the hardness after heat treatment is 45 HRC or above, the wear resistance, corrosion resistance and fatigue performance of the processed chain plate are obviously improved, andthe service life is prolonged by 60% or more.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a wear-resistant and corrosion-resistant chain plate steel and a manufacturing method thereof. Background technique [0002] At present, the chain plates are mostly processed by 40Mn and 45Mn steel plates. Generally, the surface hardness of the raw steel plates is required to be 85HRB-90HRB to ensure the quality of the edge after stamping. The hardness after heat treatment is 38-42HRC, which is prone to wear and deformation during long-term use, causing Chain extension, reduced power system efficiency, short lifespan, frequent replacement, etc. Especially for some automobile power chains, the life of the chain directly affects the life of the automobile engine and even the entire vehicle. On the other hand, the surface of the chain plate is easy to corrode in the corrosive environment such as marine climate, and it is more likely to be damaged by impact and wear under ...

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Problems solved by technology

The 16Mn chain steel introduced in "Fracture Analysis of 16Mn Steel Chain Plate" has low carbon content and needs to be carburized to meet the hardness requirements. The process is complicated

[0010] The steel types mentioned in the above documents and inventions are not suitable for direct processing of high wear-resistant chain plates with hot-rolled plates

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