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AH36-grade hot-rolled flat-bulb steel preparation method based on Adam-SVM model

An AH36, bulb flat steel technology, applied in nuclear method, metal rolling, metal rolling, etc., can solve the problems of cumbersome composition design process, high R&D cost, long R&D cycle, etc., to avoid dimensional disaster and improve accuracy degree, to achieve the effect of organic coupling

Active Publication Date: 2021-08-03
UNIV OF SCI & TECH BEIJING +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Related prior art also includes a large-scale high-strength marine flat bulb steel and its production process. The composition design of the bulb flat steel is based on physical metallurgical laws and experience for EH36, and a bulb flat steel with high low-temperature impact toughness has been developed. The composition design process is relatively cumbersome and needs to be verified through a large number of experiments, which requires relatively high R&D costs and a long R&D cycle

Method used

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  • AH36-grade hot-rolled flat-bulb steel preparation method based on Adam-SVM model
  • AH36-grade hot-rolled flat-bulb steel preparation method based on Adam-SVM model
  • AH36-grade hot-rolled flat-bulb steel preparation method based on Adam-SVM model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: After using the Adam-SVM model to optimize the elemental composition of AH36 grade hot-rolled bulbous flat steel, smelting and casting were carried out according to the above-mentioned composition range to obtain a billet with a cross-section of 280mm×165mm, and then the composition of the billet was detected, as shown in the table 1.

[0055] Composition (wt.%) of billet of table 1

[0056]

[0057] Rolling is carried out in accordance with the sequence of 850BD / 800TRM / 950SCI / 950SCⅡ rolling mills, and the rolling passes are 5 / 3 / 1 / 1 respectively. After rolling, the spherical flat steel of HP370×13 specification is obtained, and its mechanical properties are shown in Table 2.

[0058] Table 2 Mechanical Properties

[0059]

Embodiment 2

[0060] Example 2: After using the Adam-SVM model to optimize the elemental composition of AH36 hot-rolled bulbous flat steel, smelting and casting according to the above-mentioned composition range to obtain a billet with a cross-section of 280mm×165mm, and then detecting the composition of the billet, see Table 3.

[0061] Composition (wt.%) of billet of table 3

[0062]

[0063] Rolling is carried out in accordance with the sequence of 850BD / 800TRM / 950SCI / 950SCⅡ rolling mills, and the rolling passes are 5 / 3 / 1 / 1 respectively. After rolling, the spherical flat steel of HP370×13 specification is obtained, and its mechanical properties are shown in Table 4.

[0064] Table 4 mechanical properties

[0065]

Embodiment 3

[0066] Example 3: After using the Adam-SVM model to optimize the elemental composition of AH36 grade hot-rolled bulbous flat steel, smelting and casting according to the above-mentioned composition range to obtain a billet with a section of 280mm×165mm, and then detecting the composition of the billet, see Table 5.

[0067] Composition (wt.%) of billet of table 5

[0068]

[0069] Rolling was carried out in accordance with the sequence of 850BD / 800TRM / 950SCI / 950SCⅡ rolling mill, and the rolling passes were 5 / 3 / 1 / 1 respectively. After rolling, the spherical flat steel of HP370×13 specification was obtained, and its mechanical properties are shown in Table 6.

[0070] Table 6 mechanical properties

[0071]

[0072] In order to further highlight the effect of the present invention, the following two groups of comparisons are provided. When the Adam-SVM algorithm is not used to classify and optimize the design of the composition performance, and when the process optimizatio...

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Abstract

The invention discloses an AH36-grade hot-rolled flat-bulb steel preparation method based on an Adam-SVM (Support Vector Machine) model. The method comprises the following steps: performing component performance optimization on hot-rolled flat-bulb steel by utilizing an Adam-SVM algorithm to obtain alloy components of the AH36-grade hot-rolled flat-bulb steel; according to the obtained alloy components, performing converter smelting, external refining and protective casting to obtain a continuous casting steel billet; after the obtained continuous casting steel billet is evenly heated, conducting hot rolling on the continuous casting steel billet through a two-roller reversible rolling mill, a three-roller rolling mill and a universal rolling mill in sequence according to hole patterns to obtain flat-bulb steel; and after sawing by a hot saw, performing air cooling on a cooling bed, cooling to a certain temperature, and then performing spray cooling. According to the technical scheme, an optimized alloy design scheme is formulated based on a machine learning algorithm, the content of added elements in steel is reasonably reduced, the cost is further reduced, and the research and development period is shortened. Meanwhile, the low-cost and high-performance flat-bulb steel is successfully developed through optimal design of a heating system and a rolling process.

Description

technical field [0001] The invention belongs to the technical field of flat bulb steel manufacturing, and in particular relates to a method for preparing AH36 grade hot-rolled flat bulb steel based on an Adaptive Moment Estimation (Adaptive Moment Estimation, Adam)-Support Vector Machine (Support Vector Machine, SVM) model. Background technique [0002] Entering the 21st century, the field of shipbuilding and marine engineering equipment in my country has ushered in a new period of rapid growth. The rapid development of the field of shipbuilding and marine engineering equipment has put forward an urgent demand for high strength, high toughness and corrosion resistance of steel for shipbuilding and marine engineering , but also need to meet the needs of large thickness and large size specifications. The average annual demand for ship steel in the international new shipbuilding market is about 80 million tons. In 2019, the domestic demand for ship steel will reach about 12 mill...

Claims

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Application Information

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IPC IPC(8): B21B1/02B21B15/00B21B43/00C22C38/02C22C38/04C22C38/06C22C38/12G06F30/27G06N20/10
CPCB21B1/026B21B15/0007B21B43/00C22C38/02C22C38/04C22C38/06C22C38/12G06F30/27G06N20/10B21B2201/06G06F2119/08
Inventor 于浩赵勋王厚昕李宇晗王锟孙玉春
Owner UNIV OF SCI & TECH BEIJING
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