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A kind of production method of high-strength boron-containing steel plate

A production method and high-strength technology, applied in the field of steel plate production, can solve the problems of low tensile strength and yield strength, low elongation at break, and achieve good toughness, increased strength, and improved antirust performance

Active Publication Date: 2019-06-21
江苏睿腾货架有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese application number is CN201010132848.1 which discloses a boron-containing steel plate for heat treatment and its manufacturing method. The composition weight percentages are: C: 0.15-0.45wt%, Si: 0.20-0.60wt%, Mn: 1.00-2.00wt% , P≤0.030wt%, S≤0.015wt%, N≤0.008wt%, B: 0.0005~0.005wt%, Al: 0.02~0.06wt%, Cr: 0.1~0.5wt%, Ti: 0.01~0.08wt% , wherein the Ti / N atomic ratio is 1 to 50, and the others are composed of Fe and unavoidable impurities. Although the invention adopts a conventional manufacturing process to produce steel plates, there is no need to modify or upgrade the unit, and the production cost is relatively low, but the produced steel plate material The tensile and yield strengths and elongation at break are still low, still dwarfed by today's increasingly demanding automotive industry

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  • A kind of production method of high-strength boron-containing steel plate
  • A kind of production method of high-strength boron-containing steel plate
  • A kind of production method of high-strength boron-containing steel plate

Examples

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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a production method of high-strength boron-containing steel plate, the chemical composition mass ratio of the steel plate is C: 0.12%, Si: 0.45%, Mn: 1.5%, P: 0.02%, S: 0.005%, Al : 0.010%, Cr: 0.1%, Nb: 0.02%, N: 0.003%, Mo: 0.6%, B: 0.0020%, and the rest are Fe and unavoidable impurities. The production method is carried out according to the following steps,

[0027] (1) Smelting and pouring into slabs according to the above composition, and then hot rolling at 1080°C, controlling the single-pass deformation to 30%, then pickling, and then cold rolling by 50%, and the cold rolling temperature is 925°C;

[0028] (2) The steel plate after rolling is cooled to 560°C with online oil at a cooling rate of 20°C / s, and then air-cooled to room temperature;

[0029] (3) The rolled steel plate is reheated to 960°C for 4 minutes, then water-cooled and quenched, tempered at 600°C for 2 hours after quenching, the steel plate is taken out and pickled, and...

Embodiment 2

[0030] Embodiment 2: the rest are the same as in Example 1, the difference is that in the step (1), the hot rolling temperature is 1055°C, the single pass deformation is 26%, the cold rolling temperature is 935°C, and the cold rolling deformation 50%; in the step (2), the cooling rate is 16°C / s, and the oil is cooled to 550°C; in the step (3), the rolled steel plate is heated to 955°C, kept for 4 minutes, and tempered The temperature is 600°C and the temperature is kept for 3 hours.

Embodiment 3

[0031] Embodiment 3: the rest are the same as in Example 1, the difference is that in the step (1), the hot rolling temperature is 1100°C, the single pass deformation is 30%, the cold rolling temperature is 935°C, and the cold rolling deformation 40%; in the step (2), the cooling rate is 20°C / s, and the oil is cooled to 580°C; in the step (3), the rolled steel plate is heated to 965°C, kept for 4 minutes, and tempered The temperature was 590°C and the temperature was kept for 2.4 hours.

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Abstract

The invention discloses a production method for a high-strength boron-containing steel plate, and relates to the technical field of steel plate production. The method comprises the steps of smelting, rolling, cooling and tempering. A proper quantity of alloy elements are added into the steel plate, and the elements and carbon in the steel form a strengthening phase, so that the strength of the steel plate is fully improved, and the steel plate has good toughness. In the production process of the steel plate, double rolling is adopted, so that the deformation amount of the steel plate reaches 60%-90%, and the hardness and strength of the steel plate are improved; and the cooled steel plate is subjected to certain thermal refining, so that the core of the steel plate also obtains a good structure and good performance, the whole production process is simple, and the operability is high.

Description

technical field [0001] The invention relates to the technical field of steel plate production, in particular to a production method of high-strength boron-containing steel plate. Background technique [0002] In order to improve the collision safety performance of automobiles, especially the side collision and frontal collision performance, it is a development trend of steel sheets for vehicles to increase the strength of steel plates and reduce the thickness of steel plates in recent years. [0003] At present, there are two ways to obtain high-strength parts. One is to directly use ultra-high-strength steel plates with a tensile strength greater than 1000MPa, which are manufactured by stamping or rolling forming, but more complex parts cannot be manufactured; the other is to use tensile strength. For steel plates with a pressure of about 600MPa, ultra-high-strength parts can be obtained by cold forming and then heat treatment, or by hot stamping, that is, the steel plate i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C22C38/38C22C38/02C22C38/04C22C38/06C22C38/26C22C38/22C21D8/02
CPCC21D8/0247C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/22C22C38/26C22C38/32C22C38/38
Inventor 房文亮杨涛刘艳
Owner 江苏睿腾货架有限公司
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