Sweeper truck box wear-resistant and corrosion-resistant steel produced by CSP and with Rm larger than or equal to 650 MPa and preparation method of sweeper truck box wear-resistant and corrosion-resistant steel

Abstract

The invention discloses sweeper truck box wear-resistant and corrosion-resistant steel produced by CSP and with Rm larger than or equal to 650 MPa. Chemical components of the wear-resistant and corrosion-resistant steel comprise, by weight percent, 0.13%-0.25% of C, 0.60%-0.95% of Si, 0.4%-1.2% of Mn, 0.04%-0.08% of P, not larger than 0.003% of S, 0.51%-0.95% of Cu, 0.06%-0.22% of Ti and 0.0012%-0.006% of Ca. A preparation method comprises the steps that (1) after converter smelting, continuous casting is carried out to form a blank; the cast blank is heated; rolling is carried out; laminar cooling is carried out; and coiling is carried out. The thickness specification of the steel is 1.2-3.0 mm, the yield strength is larger than or equal to 600 MPa, the tensile strength is larger than or equal to 650 MPa, the ductility is larger than or equal to 12%, HB is larger than or equal to 200, the corrosion rate is smaller than or equal to 0.8 g / m<2>.h, and the requirement of light weight is met;.

Description

technical field [0001] The invention relates to the field of low-alloy high-strength steel manufacturing, in particular to wear-resistant and corrosion-resistant high-strength steel for road sweepers and a preparation method thereof. Background technique [0002] As energy saving, environmental protection, and friendliness become the development trend of society, urban road sweepers have increasingly strict requirements on their load capacity and self-weight, and put forward quantitative indicators for the self-weight of existing road sweepers, requiring that the self-weight of road sweepers must be reduced 15% more weight. The main material of the road sweeper is steel. In order to achieve the quantitative index of reducing the weight of the road sweeper, it is necessary to reduce the thickness of the steel used for the manufacture of the road sweeper. While thinning the material, it is necessary to ensure the safety and service life of the vehicle. reduce. [0003] At pr...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the thickness of hot-rolled steel plate in the technical field is relatively thick, which cannot meet the requirements of light weight and high strength, and provides a kind of thickness specification of 1.2 ~ 3.0mm, yield strength ≥ 600MPa, tensile strength ≥ 650MPa, elongation ≥ 12%, HB ≥ 200, corrosion rate ≤ 0.8g / m 2 h, Wear-resistant and corrosion-resistant steel for road sweeper box body meeting lightweight requirements and its preparation method

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