Steel plate for concrete mixing truck tank body and production method of steel plate

Abstract

The invention provides a steel plate for a concrete mixing truck tank body and a production method of the steel plate. The steel plate is prepared from, by weight, 0.17%-0.25% of C, 0.4%-0.6% of Si, 1.20%-1.40% of Mn, 0.5%-0.8% of Cr, 0.02%-0.04% of Nb, 0.0010%-0.0022% of B, 0.025%-0.04% of Ti, 0.025%-0.045% of Als, and the balance Fe and inevitable impurities, wherein Ti / N is larger than or equalto 3.4. The production method comprises the steps of smelting, continuous casting, stacking for slow-cooling, cleaning with temperature, plate blank heating, rolling, thermal treating, straighteningand inspecting. The yield strength of the steel plate is larger than 700 MPa, and the surface hardness is larger than 300 HB; and the steel plate is produced through a hot-rolled flat plate, the platetype is excellent, the residual stress is low, the performance is uniform, and the cost is low.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a steel plate for a tank body of a concrete mixer truck and a production method thereof. Background technique [0002] Concrete mixer truck is a special heavy-duty truck used to transport pre-mixed concrete. In recent years, most cities in my country have begun to restrict the construction of concrete mixing stations, so the market demand for large-capacity concrete mixer trucks has increased significantly. On the other hand, as the country has tightened the management of mixer truck products, it is stipulated that the weight of the concrete mixer truck does not meet the announcement during the registration process. The implementation of this policy has promoted the promotion of concrete mixer truck vehicles. lightweight needs. On the other hand, vehicle weight reduction is one of the important measures for energy saving and emission reduction. According to relevant information, a...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the highest tensile strength value of this invention can only reach 850Mpa, the corresponding surface hardness is less than 260HB, the wear resistance is limited, and it is produced by the method of controlled rolling, controlled cooling and then curling. The performance is significantly different due to the limitation of curling, and the steel coil needs to be flattened into a flat plate before use. After flattening and cold straightening, the internal stress of the steel plate will increase significantly, which is not good for cold forming during the production of mixing tanks.

The disadvantage is that the invention utilizes the low-carbon titanium micro-alloying method, the yield strength of the steel plate reaches 700MPa and above, but the tensile strength is lower than 900Ma, the surface hardness is lower than 300HB, and the wear resistance is poor

[0013] ① The yield strength is lower than 700MPa, resulting in excessive weight of the mixing tank;

[0014] ②The surface hardness is lower than 300HB, and the wear resistance of the steel plate is poor;

[0015] ③ Using composite materials or surface spraying and inlaying methods to improve the wear resistance of steel plates, the process is complicated and the cost is high;

[0016] ④ Coiled plate production needs to be flattened before use, the internal stress of the steel plate is large, and the performance is not uniform

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