Low-cost hot-formed steel for pipe manufacturing and production and preparation method of low-cost hot-formed steel

Abstract

The invention discloses low-cost hot-formed steel for pipe manufacturing. The hot-formed steel comprises the following chemical components including, by weight percent, 0.19%-0.28% of C, 0.20%-0.29% of Si, 1.5%-2.0% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.006% of S, 0.02%-0.06% of Al, 0.01%-0.03% of Ti, smaller than or equal to 0.004% of N, and the balance Fe and inevitable impurities. According to the low-cost hot-formed steel for pipe manufacturing and the production and preparation method of the low-cost hot-formed steel, the tensile strength of the hot-formed steel reaches 1500 MPa or above after a hot forming process, the elongation is larger than or equal to 5%, the hot-formed steel with the excellent performance is produced with the low alloy cost, the defects of cracking, resilience and the like can be effectively reduced in the hot forming process, and the requirements of light weight of a vehicle body and the like on high-strength steel are met.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a low-cost hot-formed steel for pipe making and a production and preparation method thereof. Background technique [0002] With the strengthening of people's awareness of environmental protection and the increasing requirements for automobile safety, automobile manufacturers pay more attention to reducing fuel consumption and engine exhaust emissions through lightweight automobiles. In order to ensure that the car can still meet the crash safety performance after being lightweight, major car companies have shifted their focus to the application of new materials and new processes while optimizing the car frame and structure. In the production of body structures such as bumpers, beams, and anti-collision beams, advanced ultra-high-strength and high-toughness steels are used to improve the strength of body structural parts and meet the requirements of lightweight. [0003] At...

AI Technical Summary

Problems solved by technology

However, MnB series steel is still difficult to solve the forming problem of hollow structural parts that require high strength, and the alloy cost is relatively high

Therefore, in order to meet the demand for high-strength steel such as light weight of the car body, and to solve the current industry bottleneck that high-strength steel cannot be used in the production of high-strength hollow structural parts, it is urgent to develop a low-cost hot-formed steel for pipe making and its production preparation method

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