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Accounting and predicting method of a series of temperature impact energy of steel materials

A technology for steel materials and prediction methods, which is applied in the fields of analysis of materials, chemical statistics, computer materials science, etc. to achieve accurate prediction results and avoid material loss.

Inactive Publication Date: 2019-07-16
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

At present, there is no report in domestic and foreign literature on the use of effective grain size data of iron and steel materials to establish a low temperature impact energy prediction model

Method used

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  • Accounting and predicting method of a series of temperature impact energy of steel materials
  • Accounting and predicting method of a series of temperature impact energy of steel materials
  • Accounting and predicting method of a series of temperature impact energy of steel materials

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Embodiment Construction

[0028] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0029] The invention provides a statistical and predictive method for series temperature impact energy of iron and steel materials.

[0030] like figure 1 As shown, the method includes the following steps:

[0031] (1) Carry out heat treatment to the steel plate sample;

[0032] (2) For the heat-treated steel plate sample, take samples at different positions along the thickness direction of the steel plate. Among them, take the impact sample with a size of 10mm*10mm*55mm along the rolling direction, and the standard Charpy V-notch impact sample along the thickness direction Take metallographic samples perpendicular to the rolling direction;

[0033] (3) After inlaying, grinding and polishing the metallographic sample, it is eroded with corrosive solut...

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Abstract

The invention provides an accounting and predicting method of a series of temperature impact energy of steel materials, and belongs to the technical field of prediction of the series of temperature impact energy of the steel material. The method comprises the following steps: firstly, selecting gold phase test samples and impact test samples; then eroding the gold phase test samples by utilizing corrosion liquid to obtain gold phase images, processing the gold phase images by using image processing software and accounting effective crystal grain sizes; then testing the series of temperature impact on the impact test samples, and accounting impact energy; further pre-processing the effective crystal grain size data and the impact energy data and building a prediction model; accounting the effective crystal grain size data of to-be-tested samples and carrying out pre-processing; and finally, predicting the to-be-tested samples by using a prediction model to obtain impact energy level prediction results and distribution situations of different impact energy level probability. Compared with a conventional Cottrell-Petch relation, the method disclosed by the invention has the characteristics of being more in accuracy and scientificity.

Description

technical field [0001] The invention relates to the technical field of temperature impact energy prediction of iron and steel material series, in particular to a statistical and prediction method for temperature impact energy of iron and steel material series. Background technique [0002] The impact energy of steel materials is used to characterize the toughness of steel. Toughness refers to the amount of energy consumed in the fracture process of steel materials. It comprehensively reflects the strength and plasticity of steel, and is an important performance index of steel materials. [0003] From the Cottrell theory and the Hall-Petch relationship, it can be deduced that the ductile-brittle transition temperature of the material is related to the average grain size d of the material. Reducing the average grain size d is beneficial to reduce the ductile-brittle transition temperature and improve the low-temperature impact energy of the material. For steel materials, diff...

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Application Information

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IPC IPC(8): G01N3/303G01N1/32G01N1/28G01D21/02G16C20/70G16C60/00
CPCG01D21/02G01N1/28G01N1/32G01N3/303G16C20/70G16C60/00
Inventor 李秀程尚成嘉王学敏赵靖霄王学林
Owner UNIV OF SCI & TECH BEIJING
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