A high-strength, high-temperature-resistant rafm steel and its design method based on machine learning

A machine learning and design method technology, applied in the field of steel materials, can solve complex and time-consuming problems, and achieve good tensile properties and strong generalization capabilities
CN113073267BActive Publication Date: 2022-04-08HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2022-04-08

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Abstract

The invention provides a high-strength, toughness and high-temperature resistant RAFM steel, the chemical composition of which is: C: 0.12-0.16%, Cr: 9.5-10.5%, W: 1.6-1.8%, Si: 0.48-0.52%, Mn: 0.6- 0.7%, V: 0.23~0.27%, Ta: 0.10~0.26%, Zr: 0.001~0.005%, etc.; heat treatment parameters are: normalizing temperature 1010~1050℃, normalizing time 20~55min, tempering temperature 600~720 ℃, tempering time 50 ~ 90min. The present invention also provides a machine learning-based design method for the above-mentioned steel. The RAFM steel of the present invention has a higher service temperature upper limit, and also has better tensile properties at high temperatures; at the same time, the machine learning method constructed by the present invention has strong generalization ability, and can quickly and efficiently design reasonable composition and heat treatment parameter.
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Description

technical field

[0001] The invention relates to the technical field of iron and steel materials, in particular to a high-strength, high-temperature-resistant RAFM steel and a design method based on machine learning. Background technique

[0002] Low-activation ferritic / martensitic (RAFM) steels developed from conventional 9Cr-1Mo steels are considered to be very promising structures for fusion reactors due to their good thermophysical, thermomechanical, and radiation resistance properties Material. As a metallic structural material, tensile properties are the most important fundamental factor in the design and application evaluation of RAFM steel. In fusion reactors, the improvement of high-temperature mechanical properties of structural materials is conducive to improving the utilization efficiency of nuclear energy. At present, the upper limit of the service temperature of RAFM steel is 550°C. In order to optimize the high temperature tensile properties of RAFM steels, ...

Claims

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