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Grain size control method for stainless steel extra-thick plate

A control method and technology for extra-thick plates, applied in temperature control, rolling force/gap control, metal rolling, etc., can solve problems such as difficulty in grain size control of 316H stainless steel thick plates

Pending Publication Date: 2022-03-25
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to solve the difficult problem of grain size control of 316H stainless steel thick plate of 30~95mm

Method used

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  • Grain size control method for stainless steel extra-thick plate
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  • Grain size control method for stainless steel extra-thick plate

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Embodiment Construction

[0017] The invention mainly solves the grain size control problem of 30-90mm 316H stainless steel thick and extra-thick plates.

[0018] The purpose of the present invention is to solve the problems of a small amount of super large grains in the hot-rolled structure and the problems that cannot pass through the solid solution through the control of the type of blank, the total amount of rolling deformation, the amount of deformation in a single pass, the final rolling temperature, and the solid solution temperature and time of the steel plate. Solvent treatment solves the problem of grain size and uniformity, and realizes stable and accurate control of grain size 4~6 in the full thickness direction of 30-90mm thick plate and extra thick steel plate.

[0019] In the production of steel plates, due to the advantages of high efficiency and low cost of continuous casting slabs, continuous casting slabs are generally used. Only when the total rolling deformation and single weight ar...

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Abstract

The invention relates to the field of grain size control of 316H stainless steel thick plates. According to the grain size control method for the stainless steel extra-thick plate, a blank is made of a 316H stainless steel plate, the blank is subjected to hot rolling to form a steel plate with the thickness of 30-95 mm, when the blank is a continuous casting blank, the minimum compression ratio in the rolling process is 6.7, when the blank is a forging blank, the minimum compression ratio in the rolling process is 5, and the deformation of main passes in the blank rolling process is not smaller than 15%; the finish rolling temperature is 1000 to 1050 DEG C; after solid solution heat treatment, the mechanical property and the like meet the technical requirements, and the grain size is kept unchanged.

Description

technical field [0001] The invention relates to the field of grain size control of 316H stainless steel thick plates. Background technique [0002] In some special fields, such as the construction of nuclear power plants, due to the safety requirements of nuclear power plants in service, high requirements are placed on the uniformity of structure and performance stability of steel plates throughout the thickness. The 316H stainless steel plate used for high-temperature components of the new generation of nuclear power technology requires that the grain size of the full cross-section of all thickness steel plates of 30-95mm be controlled within the range of 4-6. The steel plate is produced according to the conventional hot rolling and solid solution process, the qualified rate of grain size is below 20%, and the typical grain size is 2~7 grades. The unqualified conditions mainly include surface coarse grains, layered mixed grains, and a small amount of super large grains. Wa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/02B21B37/58B21B37/74
CPCB21B3/02B21B37/58B21B37/74
Inventor 尹嵬庄迎张威李建春李吉东
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD