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A kind of preparation method of high boron stainless steel plate

A stainless steel plate and stainless steel technology is applied in the field of preparation of nuclear materials and ceramic materials, which can solve the problems of complex operation and high equipment requirements, and achieve the effects of simple operation steps, strong operability and low requirements.

Active Publication Date: 2019-03-19
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing high-boron stainless steel plates, which solves the problem of high equipment requirements and complicated operations in the current method of hot extrusion to make thick steel plates with cladding layers, and then rolling them into thin steel plates question

Method used

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  • A kind of preparation method of high boron stainless steel plate
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Experimental program
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Effect test

Embodiment 1

[0029] A kind of preparation method of high boron stainless steel plate of the present invention, carry out successively according to following steps:

[0030](a) Powder packaging: the chemical composition is C: 0.03%, B: 0.5%, Si: 0.75%, Mn: 1.2%, P: 0.015%, S: 0.010%, Ni: 13.5%, Cr: 18.9% , N: 0.050%, O: 0.001%, the rest is Fe and unavoidable impurities, the high-boron stainless steel alloy powder with a particle size of 10 μm is placed in the frame box and filled with vibration, and the cover is covered. Manual argon arc welding or other Welding package in equivalent way;

[0031] (b) Free forging: Put the packaged frame box into a high-temperature furnace, heat it to 1150°C, heat at a rate of 10°C / min, and hold it for 90 minutes, then free forge it into a thick plate. The temperature is 950°C, and the forging reduction is not less than 50%.

[0032] (c) Hot rolling: Put the forged thick plate into the high-temperature furnace again, heat it to 1150°C, the heating rate is...

Embodiment 2

[0036] A kind of preparation method of high boron stainless steel plate of the present invention, carry out successively according to following steps:

[0037] (a) Powder packaging: the chemical composition is C: 0.026%, B: 1.0%, Si: 0.65%, Mn: 1.3%, P: 0.018%, S: 0.010%, Ni: 14.0%, Cr: 18.5% , N: 0.030%, O: 0.001%, the rest is Fe and unavoidable impurities, the high-boron stainless steel alloy powder with a particle size of 40 μm is placed in the frame box and filled with vibration, and the cover is covered, and manual argon arc welding or other methods are used. Welding package in equivalent way;

[0038] (b) Free forging: Put the packaged frame box into a high-temperature furnace, heat it to 1200°C, heat at a rate of 10°C / min, and hold it for 90 minutes, then free forge it into a thick plate. The temperature is 950°C, and the forging reduction is not less than 50%.

[0039] (c) Hot rolling: put the forged thick plate into the high temperature furnace again, heat it to 100...

Embodiment 3

[0043] A kind of preparation method of high boron stainless steel plate of the present invention, carry out successively according to following steps:

[0044] (a) Powder packaging: the chemical composition is C: 0.025%, B: 1.5%, Si: 0.85%, Mn: 1.1%, P: 0.014%, S: 0.010%, Ni: 13.8%, Cr: 19.0% , N: 0.040%, O: 0.001%, the rest is Fe and unavoidable impurities, the high-boron stainless steel alloy powder with a particle size of 80 μm is placed in the frame box and filled with vibration, and the cover is covered, and manual argon arc welding or other methods are used. Welding package in equivalent way;

[0045] (b) Free forging: Put the packaged frame box into a high-temperature furnace, heat it to 1050°C, heat at a rate of 5°C / min, and hold it for 90 minutes, then free forge it into a thick plate. The temperature is 950°C, and the forging reduction is not less than 50%.

[0046] (c) Hot rolling: Put the forged thick plate into the high temperature furnace again, heat it to 1050...

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Abstract

The present invention discloses a preparation method for a high-boron stainless steel plate. The preparation method comprises: powder encapsulation, namely loading a high-boron stainless steel alloy powder meeting the requirements on chemical components into a frame box, compacting by vibrating such that the box is full of the powder, and covering the box with a cover plate for welding encapsulation; free forging, namely placing the encapsulated frame box into a high-temperature furnace to undergo heating, warming, and temperature preservation, and then carrying out free forging to obtain a thick plate; hot rolling, namely placing the forged thick plate into the high-temperature furnace again to undergo heating, warming, and temperature preservation, and then carrying out hot rolling to obtain a thin plate of a desired thickness; and profile processing: subjecting the hot-rolled plate to frame removal, solid-solution treatment and straightening, thereby obtaining a finished plate with boride uniformly distributed in austenite and having a density of 97-99%T.D. The finished plate manufactured according to the preparation method for a high-boron stainless steel plate has the same excellent properties as a plate manufactured by means of a process in the prior art, but is lower in requirements on equipment and also lower in manufacturing cost.

Description

technical field [0001] The invention relates to the preparation technology of nuclear materials and ceramic materials, in particular to a preparation method of high-boron stainless steel plates. Background technique [0002] After boron absorbs neutrons, only soft gamma photons (about 0.5 MeV) and easily absorbed alpha particles are produced without large residual induced radioactivity. Therefore, boron stainless steel prepared by adding boron to stainless steel can be used as a neutron absorbing material, which can be installed around a nuclear reactor to absorb neutrons leaked from the core to ensure the safety of operators working around it; in the storage of nuclear fuel and During transportation, boron stainless steel as a neutron absorbing material can ensure that the depth of nuclear fuel is below the subcritical safety threshold, ensuring the safety of nuclear fuel storage or transportation. [0003] In the ASTM A887-89 standard, according to the mechanical properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/17C22C38/58C22C38/54C22C38/02C22C38/04
CPCB22F3/17C22C38/001C22C38/02C22C38/04C22C38/54C22C38/58
Inventor 付道贵刘晓珍简敏李刚王美玲王贯春解怀英
Owner NUCLEAR POWER INSTITUTE OF CHINA
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