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Production method for B-containing steel

A production method and technology for steel slabs, applied in the direction of metal rolling, etc., can solve problems such as affecting the working environment of workers, damage to molds, and falling off of iron oxide sheets.

Active Publication Date: 2019-11-12
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Production method for B-containing steel
  • Production method for B-containing steel
  • Production method for 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, finished rolled, coiled, and slowly cooled to obtain a hot rolled coil.

[0054] S2, the hot-rolled coils are sequentially pickled and cold-rolled to obtain chilled coils.

[0055] S3, the chilled coil is sequentially subjected to cover annealing, flattening, and degreasing and oiling to obtain an anti-rust coil.

[0056] S4, the anti-corrosion coil is subjected to shearing, heat treatment, stamping and quenching in sequence to obtain automobile stamping parts, wherein the heat treatment adopts N 2 As a protective gas.

[0057] In this embodiment, the coiling temperature and slow cooling process are optimized first, and the process parameter control is shown in Table 1.

[0058] Table 1

[0059] Serial number Curling temperature, ℃ Slow cooling time in slow cooling pit, h Tempe...

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Abstract

The invention discloses a production method for a B-containing steel. The production method comprises the steps that a plate blank of the B-containing steel is obtained; the obtained plate blank of the B-containing steel is rolled, the coiling temperature in rolling is controlled as 660-700 DEG C, the slow cooling time inside a slow cooling pit is controlled as 24-30 hours, and the temperature iscontrolled as 250-300 DEG C when slow cooling is finished; and the plate blank of the B-containing steel after the rolling is molded by hot stamping. By means of adoption of the production method forthe B-containing steel, in the hot stamping working procedure, an oxidized iron sheet is firmly bound to a base body and is not prone to falling off, and the working environment of workers is improved.

Description

Technical field [0001] The invention belongs to the technical field of metal forming, and particularly relates 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 auto sheet hot forming is to heat a special high-strength steel sheet to the austenite temperature range for heat treatment, and then quickly move the heated high-strength steel sheet to the mold for rapid stamping; it passes through the press under the pressure holding state The mold (not air) quenches and cools the parts at a certain cooling rate, and finally obtains a new forming process of ultra-high-strength stamping parts. Generally, steel for hot forming of automotive plates contains B element to improve the hardenability of steel. [0003] When the current B-co...

Claims

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Application Information

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Patent Type & Authority Applications(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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