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A kind of production method of b-containing steel

A production method and steel slab technology, applied in metal rolling and other directions, can solve problems such as shedding of iron oxide sheets, damage to molds, and affecting the working environment of workers, so as to achieve the effect of not easy to fall off, strong bonding force, and improving the working environment of workers

Active Publication Date: 2021-05-25
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a production method of B-containing steel to solve the problem that the iron oxide scale on the surface falls off in flake or powder form during the rapid stamping process of the mold after the high-strength steel plate is heated in the prior art, which affects The problem of workers' working environment and damaged molds

Method used

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  • A kind of production method of b-containing steel
  • A kind of production method of b-containing steel
  • A kind of production method of b-containing steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] The implementation method of this embodiment is as follows:

[0053] S1, for the B-containing steel slab, the B-containing steel slab obtained by continuous casting is sequentially heated, rough rolled, finish rolled, coiled, and slowly cooled to obtain a hot-rolled coil.

[0054] S2, the hot-rolled coil is sequentially pickled and cold-rolled to obtain a chilled coil.

[0055] S3, the chilled roll is sequentially subjected to bell annealing, smoothing and degreasing and oiling to obtain a rust-proof roll.

[0056] S4, shearing, heat treatment, stamping and quenching are performed on the antirust coil in sequence to obtain automobile stamping parts, wherein the heat treatment adopts N 2 as a shielding gas.

[0057] In this embodiment, firstly, the coiling temperature and the slow cooling process are optimized, and the process parameters are controlled in Table 1.

[0058] Table 1

[0059] serial number Curling temperature, ℃ Slow cooling time in slow c...

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Abstract

The invention discloses a production method of B-containing steel. The method comprises: obtaining a slab containing B-steel; rolling the obtained slab containing B-steel, and controlling the coiling temperature during rolling to 660-700 °C, the slow cooling time in the slow cooling pit is controlled at 24-30 hours, and the temperature at the end of slow cooling is controlled at 250-300 °C; the rolled slab containing B steel is hot stamped. By adopting the production method of the B-containing steel of the present invention, in the hot stamping process, the iron oxide scale is firmly combined with the matrix, the iron oxide scale is not easy to fall off, and the working environment of workers is improved.

Description

technical field [0001] The invention belongs to the technical field of metal forming, in particular to a production method of B-containing steel. Background technique [0002] The application of ultra-high-strength steel stamping parts on the car body can not only realize the lightweight of the car, but also improve the impact resistance of the car and improve the safety of the car. The new technology of thermoforming of automobile sheet is to heat special high-strength steel plate to the austenite temperature range for heat treatment, and then quickly move the heated high-strength steel plate into the mold for rapid stamping; The mold (instead of air) quenches and cools the parts at a certain cooling rate, and finally obtains a new forming process for ultra-high-strength stamping parts. Generally, the steel for hot forming of automobile plates contains B element to improve the hardenability of the steel. [0003] When the B-containing steel plate currently produced is hot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C21D1/30B21B1/28B21B1/26
CPCB21B1/26B21B1/28B21B2001/221B21B2001/225C21D1/30C21D8/0226C21D8/0236
Inventor 张亮亮徐德超李润昌于洋王畅高小丽刘文鑫王泽鹏徐海卫李飞吕丽鸽张栋
Owner SHOUGANG CORPORATION
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