An acid-resistant steel plate for storage equipment and its preparation method

A steel plate and equipment technology, which is applied in the field of acid-resistant steel plate for storage equipment and its preparation, can solve the problems of corrosion storage equipment, storage equipment damage, increase storage costs, etc., and achieve good strength, toughness, acid resistance and low cost.

Inactive Publication Date: 2016-09-21
SUZHOU JIN YUAN OIL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when it is used to store some acidic goods, it often corrodes the storage equipment, causing the storage equipment to be damaged in a short time and increasing the storage cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment is an acid-resistant steel plate for storage equipment. The composition and mass percentage of the steel plate are: C: 0.31%, Mn: 0.45%, Si: 0.07%, P: 0.006%, S: 0.002%, Nb : 0.06%, V: 0.07%, Ti: 0.05%, Al: 0.08%, N: 0.006%, H: 0.00020%, Cu: 0.012%, Cr: 0.4%, Mo: 0.23%, the balance is Fe and impurities to be avoided;

[0056] In the steel plate of this embodiment, the first phase is ferrite, the second phase is pearlite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 2.5%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 7.0%, and no banded structure; the steel plate of this embodiment has an average grain diameter of ferrite of 3.5 μm from the surface to 1 / 4 thickness, an average diameter of pearlite clusters of 6.0 m, and iron from 1 / 4 thickness to the center. The average crystal grain diameter of the element body is 5.0 μm, and the average diameter of the pearlite clusters is 7.0 μm.

...

Embodiment 2

[0069] In the acid-resistant steel plate used for storage equipment in this embodiment, the composition and mass percentage of the steel plate are: C: 0.32%, Mn: 0.46%, Si: 0.08%, P: 0.007%, S: 0.003%, Nb: 0.07 %, V: 0.08%, Ti: 0.06%, Al: 0.09%, N: 0.002%, H: 0.0001%, Cu: 0.013%, Cr: 0.5%, Mo: 0.24%, the balance is Fe and unavoidable impurities;

[0070] In the steel plate of this embodiment, the first phase is ferrite, the second phase is pearlite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 2.6%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 7.3%, and no banded tissue;

[0071] In the steel sheet of this example, the average grain diameter of ferrite from the surface to 1 / 4 thickness is 3.6 μm, the average diameter of pearlite clusters is 6.2 μm, and the average grain diameter of ferrite from 1 / 4 thickness to the center is 5.2 μm , the average diameter of pearlite clusters is 7.2 μm.

[0072] The prepa...

Embodiment 3

[0084] In the acid-resistant steel plate used for storage equipment in this embodiment, the composition and mass percentage of the steel plate are: C: 0.33%, Mn: 0.47%, Si: 0.09%, P: 0.008%, S: 0.005%, Nb: 0.08 %, V: 0.09%, Ti: 0.07%, Al: 0.1%, N: 0.002%, H: 0.00012%, Cu: 0.015%, Cr: 0.6%, Mo: 0.25%, the balance is Fe and unavoidable impurities;

[0085] In the steel plate of this embodiment, the first phase is ferrite, the second phase is pearlite, the volume percentage of the second phase from the surface to 1 / 4 thickness is 2.8%, and the volume percentage of the second phase from 1 / 4 thickness to the center is 7.5%, and no banded structure; the steel plate of this embodiment has an average grain diameter of ferrite of 3.7 μm from the surface to 1 / 4 thickness, an average diameter of pearlite clusters of 6.3 μm, and iron from 1 / 4 thickness to the center. The average crystal grain diameter of the element body is 5.3 μm, and the average diameter of pearlite clusters is 7.3 μm....

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Abstract

The invention provides an anti-acid steel plate for storage equipment and a preparation method of the anti-acid steel plate. The steel plate is prepared from the following components in percentage by mass: 0.31-0.33% of C, 0.45-0.47% of Mn, 0.07-0.09% of Si, 0.006-0.008% of P, 0.002-0.005% of S, 0.06-0.08% of Nb, 0.07-0.09% of V, 0.05-0.07% of Ti, 0.08-0.1% of Al, less than or equal to 0.006% of N, less than or equal to 0.00020% of H, 0.012-0.015% of Cu, 0.4-0.6% of Cr, 0.23-0.25% of Mo and the balance of Fe. According to the anti-acid steel plate, a reasonable two-phase ratio as well as fine ferrite and dispersively distributed pearlite of the steel plate can be obtained and the formation of banded structure is avoided; and without the banded structure, the acid resistance is improved.

Description

technical field [0001] The invention relates to a steel plate and a preparation method thereof, in particular to an acid-resistant steel plate used for storage equipment and a preparation method thereof. Background technique [0002] Storage equipment refers to the technical devices and tools that can meet the needs of storing and keeping items. Storage equipment is the main symbol of the level of storage and logistics technology. Modern storage equipment reflects the development of modern storage and logistics technology. The shelves in the storage equipment are more commonly used equipment. Due to the storage needs of special materials, the use conditions and environments of the shelves are becoming more and more severe, and the thickness of the steel plate is becoming thicker and thicker. Requirements are also constantly increasing. Especially when used to store some acidic goods, the storage equipment is often corroded, resulting in damage to the storage equipment in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C21D8/02
CPCC21D8/0247C21D2211/005C21D2211/009C22C38/04C22C38/12C22C38/14C22C38/16C22C38/18
Inventor 李琪
Owner SUZHOU JIN YUAN OIL MACHINERY
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