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Multi-performance-coupled optimized steel optimization method

An optimization method and steel technology, applied in computer materials science, informatics, instruments, etc., can solve problems such as limiting the use range of materials, achieve the effect of reducing material design cycle, reducing composition cost, and broad application prospects

Inactive Publication Date: 2019-08-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0051] As mentioned above, material design not only cares about the service performance of materials, but also concerns about the composition and smelting cost of materials. Excessive composition costs will limit the scope of use of materials

Method used

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Embodiment

[0117] Embodiment: Design a kind of steel material that is easy to weld, has high corrosion resistance and yield strength above 390MPa, and has impact toughness above 60J at -40°C. The material can resist atmospheric corrosion, single medium or mixed medium corrosion of chloride ion and sulfite ion. The designed steel needs to achieve the coupling of weldability, corrosion resistance, strength and toughness.

[0118] (1) Extract target steel performance indicators and element types according to the service environment:

[0119] Table 1 Performance and cost target values ​​of design steel grades

[0120]

[0121] (2) The range of chemical elements determined according to the above-mentioned objectives. Compositional elements include: commonly used compositional elements C, Si, Mn, S, P, compositional elements Ni, Cr, Cu for improving atmospheric corrosion resistance, micro-component composition for grain refinement, precipitation strengthening and improvement of corrosion r...

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Abstract

The invention belongs to the field of steel designing, and particularly relates to a multi-performance-coupled optimized steel optimization method. The target steel optimization method is designed foraiming at a high-strength, high-toughness and easy-welding corrosion-resisting steel material, thereby obtaining a quick optimization method for component forming element proportion in a multi-performance target requirement. The optimization method comprises the steps of extracting a target steel performance index and element kinds according to an in-service environment; calculating each performance of the target steel by means of a multi-performance coupling model; calculating the component composition cost of the target steel according to the component composition cost model of the target steel; according to each performance and the cost composition cost of the target steel, acquiring the weight coefficient of each performance and component composition cost of the target steel; acquiring a largest value range of the component composition content of the target steel; and by means of a multi-target optimization function and an optimization model, calculating the optimized chemical component range, the tissue parameter and the expected performance of the target steel based on a reasonable component composition cost.

Description

technical field [0001] The invention belongs to the field of steel material design, and in particular relates to a steel material optimization method for multi-performance coupling optimization. The target steel optimization method is designed for high-strength, high-toughness and easy-to-weld corrosion-resistant steel materials, and obtains a rapid optimization method for the proportion of components and elements in corrosion-resistant steel under the requirements of multiple performance targets. Background technique [0002] Corrosion-resistant steel often requires materials to have good corrosion resistance, high strength, good toughness, and excellent welding performance at the same time to ensure the service life of the material, structural safety, and easy use. Taking weathering steel for truck body as an example, the heavy-duty railway industry in the world is developing rapidly. On the one hand, it requires heavy-duty transportation and lightweight body, reducing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00
CPCG16C60/00
Inventor 余伟王纯刘敏陈雨来程知松何春雨
Owner UNIV OF SCI & TECH BEIJING
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